SmogRank / Cleaner or dirtier / United States
United States: cleaner or dirtier, 2026
In United States, 812 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 403 got dirtier and 374 cleaner.
The 403 cities that got dirtier, biggest rise first
| # | City | 2025 | 2026 | Change |
|---|---|---|---|---|
| 1 | NampaIdaho, United States | 36 | 58 | +6.5 µg/m³+100% |
| 2 | PrinevilleOregon, United States | 35 | 58 | +6.4 µg/m³+102% |
| 3 | ShreveportLouisiana, United States | 31 | 55 | +5.7 µg/m³+102% |
| 4 | La GrandeOregon, United States | 31 | 55 | +5.4 µg/m³+96% |
| 5 | OntarioOregon, United States | 38 | 56 | +4.8 µg/m³+71% |
| 6 | Baker CityOregon, United States | 33 | 53 | +4.5 µg/m³+76% |
| 7 | MadrasOregon, United States | 36 | 54 | +4.1 µg/m³+64% |
| 8 | MiamiOklahoma, United States | 51 | 58 | +3.7 µg/m³+40% |
| 9 | LaredoTexas, United States | 53 | 59 | +3.5 µg/m³+35% |
| 10 | PendletonOregon, United States | 31 | 49 | +3.2 µg/m³+57% |
| 11 | YorkPennsylvania, United States | 44 | 55 | +3.2 µg/m³+40% |
| 12 | South LaurelMaryland, United States | 30 | 46 | +2.8 µg/m³+52% |
| 13 | Hood RiverOregon, United States | 23 | 38 | +2.7 µg/m³+64% |
| 14 | Alta SierraCalifornia, United States | 31 | 46 | +2.7 µg/m³+49% |
| 15 | Walla WallaWashington, United States | 31 | 46 | +2.7 µg/m³+49% |
| 16 | VancouverWashington, United States | 28 | 43 | +2.6 µg/m³+51% |
| 17 | PhiladelphiaPennsylvania, United States | 47 | 55 | +2.6 µg/m³+31% |
| 18 | LancasterPennsylvania, United States | 44 | 54 | +2.6 µg/m³+32% |
| 19 | MercedCalifornia, United States | 38 | 51 | +2.4 µg/m³+35% |
| 20 | RedmondOregon, United States | 27 | 40 | +2.4 µg/m³+50% |
| 21 | Moses LakeWashington, United States | 35 | 48 | +2.4 µg/m³+38% |
| 22 | San Luis ObispoCalifornia, United States | 32 | 46 | +2.4 µg/m³+41% |
| 23 | Tri-CitiesWashington, United States | 23 | 37 | +2.4 µg/m³+57% |
| 24 | Eagle PassTexas, United States | 49 | 55 | +2.3 µg/m³+26% |
| 25 | EphrataWashington, United States | 31 | 43 | +2.2 µg/m³+39% |
| 26 | MedinaOhio, United States | 41 | 52 | +2.2 µg/m³+30% |
| 27 | Airway HeightsWashington, United States | 31 | 43 | +2.1 µg/m³+38% |
| 28 | HopewellVirginia, United States | 32 | 43 | +2.0 µg/m³+35% |
| 29 | Wake ForestNorth Carolina, United States | 56 | 60 | +1.9 µg/m³+16% |
| 30 | VisaliaCalifornia, United States | 53 | 57 | +1.9 µg/m³+18% |
| 31 | Spokane ValleyWashington, United States | 41 | 51 | +1.9 µg/m³+26% |
| 32 | MeadWashington, United States | 37 | 47 | +1.9 µg/m³+29% |
| 33 | Twin FallsIdaho, United States | 31 | 41 | +1.9 µg/m³+35% |
| 34 | ReadingPennsylvania, United States | 41 | 51 | +1.9 µg/m³+26% |
| 35 | OrcuttCalifornia, United States | 24 | 35 | +1.9 µg/m³+43% |
| 36 | AustinTexas, United States | 51 | 54 | +1.8 µg/m³+20% |
| 37 | LimaOhio, United States | 44 | 52 | +1.8 µg/m³+23% |
| 38 | Timberwood ParkTexas, United States | 43 | 52 | +1.8 µg/m³+23% |
| 39 | CanonsburgPennsylvania, United States | 35 | 45 | +1.8 µg/m³+29% |
| 40 | Jurupa ValleyCalifornia, United States | 57 | 61 | +1.8 µg/m³+15% |
| 41 | MissionTexas, United States | 53 | 57 | +1.8 µg/m³+17% |
| 42 | SpartanburgSouth Carolina, United States | 49 | 54 | +1.8 µg/m³+20% |
| 43 | ClovisCalifornia, United States | 46 | 52 | +1.7 µg/m³+21% |
| 44 | QuincyWashington, United States | 28 | 38 | +1.7 µg/m³+33% |
| 45 | SebastopolCalifornia, United States | 23 | 32 | +1.7 µg/m³+41% |
| 46 | ToledoOhio, United States | 51 | 55 | +1.7 µg/m³+18% |
| 47 | ChattanoogaTennessee, United States | 47 | 53 | +1.7 µg/m³+20% |
| 48 | WyomissingPennsylvania, United States | 41 | 51 | +1.7 µg/m³+23% |
| 49 | Santa CruzCalifornia, United States | 27 | 37 | +1.7 µg/m³+35% |
| 50 | PortsmouthOhio, United States | 51 | 54 | +1.6 µg/m³+17% |
| 51 | WheelersburgOhio, United States | 51 | 54 | +1.6 µg/m³+17% |
| 52 | StaytonOregon, United States | 26 | 34 | +1.6 µg/m³+35% |
| 53 | AtascaderoCalifornia, United States | 24 | 33 | +1.6 µg/m³+37% |
| 54 | MaconGeorgia, United States | 55 | 58 | +1.6 µg/m³+15% |
| 55 | FlatwoodsKentucky, United States | 47 | 53 | +1.6 µg/m³+19% |
| 56 | BearDelaware, United States | 36 | 44 | +1.6 µg/m³+25% |
| 57 | AshlandKentucky, United States | 41 | 49 | +1.5 µg/m³+21% |
| 58 | ElginIllinois, United States | 51 | 54 | +1.5 µg/m³+16% |
| 59 | JohnstownPennsylvania, United States | 38 | 47 | +1.5 µg/m³+22% |
| 60 | BillingsMontana, United States | 35 | 43 | +1.5 µg/m³+24% |
| 61 | LockwoodMontana, United States | 35 | 43 | +1.5 µg/m³+24% |
| 62 | San LeandroCalifornia, United States | 33 | 41 | +1.5 µg/m³+25% |
| 63 | The DallesOregon, United States | 29 | 38 | +1.5 µg/m³+28% |
| 64 | MantecaCalifornia, United States | 37 | 46 | +1.5 µg/m³+22% |
| 65 | RiversideCalifornia, United States | 55 | 58 | +1.4 µg/m³+13% |
| 66 | CorcoranCalifornia, United States | 53 | 55 | +1.4 µg/m³+14% |
| 67 | Little RockArkansas, United States | 52 | 55 | +1.4 µg/m³+15% |
| 68 | BrookfieldIllinois, United States | 52 | 54 | +1.4 µg/m³+15% |
| 69 | Oak LawnIllinois, United States | 51 | 54 | +1.4 µg/m³+15% |
| 70 | Columbia CityIndiana, United States | 48 | 53 | +1.4 µg/m³+16% |
| 71 | FayettevilleNorth Carolina, United States | 44 | 52 | +1.4 µg/m³+18% |
| 72 | WilmingtonDelaware, United States | 42 | 50 | +1.4 µg/m³+18% |
| 73 | DoverDelaware, United States | 42 | 49 | +1.4 µg/m³+19% |
| 74 | Coeur d'AleneIdaho, United States | 39 | 47 | +1.4 µg/m³+20% |
| 75 | BethlehemPennsylvania, United States | 38 | 46 | +1.4 µg/m³+20% |
| 76 | EllensburgWashington, United States | 33 | 41 | +1.4 µg/m³+23% |
| 77 | ConcordCalifornia, United States | 24 | 32 | +1.4 µg/m³+33% |
| 78 | AthensGeorgia, United States | 43 | 51 | +1.4 µg/m³+18% |
| 79 | SomersetKentucky, United States | 38 | 46 | +1.4 µg/m³+21% |
| 80 | FresnoCalifornia, United States | 52 | 55 | +1.4 µg/m³+14% |
| 81 | Lincoln ParkMichigan, United States | 49 | 53 | +1.4 µg/m³+16% |
| 82 | LebanonPennsylvania, United States | 47 | 52 | +1.3 µg/m³+15% |
| 83 | Columbia FallsMontana, United States | 45 | 52 | +1.3 µg/m³+16% |
| 84 | MarquetteMichigan, United States | 45 | 52 | +1.3 µg/m³+16% |
| 85 | MendhamNew Jersey, United States | 34 | 41 | +1.3 µg/m³+21% |
| 86 | RandolphNew Jersey, United States | 34 | 41 | +1.3 µg/m³+21% |
| 87 | GreenvilleNorth Carolina, United States | 35 | 42 | +1.3 µg/m³+21% |
| 88 | King CityCalifornia, United States | 33 | 40 | +1.3 µg/m³+22% |
| 89 | CarpinteriaCalifornia, United States | 31 | 38 | +1.3 µg/m³+24% |
| 90 | HarrisburgPennsylvania, United States | 46 | 52 | +1.3 µg/m³+16% |
| 91 | NorthbrookIllinois, United States | 44 | 51 | +1.3 µg/m³+16% |
| 92 | SpokaneWashington, United States | 41 | 48 | +1.3 µg/m³+18% |
| 93 | LewistonIdaho, United States | 48 | 52 | +1.2 µg/m³+14% |
| 94 | YpsilantiMichigan, United States | 46 | 52 | +1.2 µg/m³+15% |
| 95 | BensalemPennsylvania, United States | 45 | 51 | +1.2 µg/m³+15% |
| 96 | Cleveland HeightsOhio, United States | 42 | 49 | +1.2 µg/m³+16% |
| 97 | ChesapeakeVirginia, United States | 39 | 46 | +1.2 µg/m³+17% |
| 98 | SpringfieldVirginia, United States | 40 | 47 | +1.2 µg/m³+17% |
| 99 | Rose HillVirginia, United States | 36 | 43 | +1.2 µg/m³+18% |
| 100 | PleasantvilleNew Jersey, United States | 33 | 40 | +1.2 µg/m³+20% |
| 101 | SmithvilleNew Jersey, United States | 33 | 40 | +1.2 µg/m³+20% |
| 102 | MissoulaMontana, United States | 28 | 34 | +1.2 µg/m³+24% |
| 103 | HillsboroOregon, United States | 26 | 33 | +1.2 µg/m³+26% |
| 104 | Winston-SalemNorth Carolina, United States | 42 | 48 | +1.2 µg/m³+16% |
| 105 | CharlottesvilleVirginia, United States | 39 | 46 | +1.2 µg/m³+17% |
| 106 | ModestoCalifornia, United States | 39 | 46 | +1.2 µg/m³+17% |
| 107 | Hunt ValleyMaryland, United States | 38 | 45 | +1.2 µg/m³+17% |
| 108 | BendOregon, United States | 30 | 37 | +1.2 µg/m³+22% |
| 109 | CanbyOregon, United States | 24 | 31 | +1.2 µg/m³+27% |
| 110 | New OrleansLouisiana, United States | 41 | 47 | +1.1 µg/m³+15% |
| 111 | NewarkDelaware, United States | 38 | 44 | +1.1 µg/m³+16% |
| 112 | SeafordDelaware, United States | 34 | 40 | +1.1 µg/m³+18% |
| 113 | Redwood CityCalifornia, United States | 28 | 34 | +1.1 µg/m³+22% |
| 114 | AlbanyOregon, United States | 26 | 32 | +1.1 µg/m³+24% |
| 115 | GreshamOregon, United States | 26 | 32 | +1.1 µg/m³+24% |
| 116 | MaderaCalifornia, United States | 47 | 52 | +1.1 µg/m³+13% |
| 117 | NashvilleTennessee, United States | 45 | 51 | +1.1 µg/m³+14% |
| 118 | MorrisvilleNorth Carolina, United States | 42 | 48 | +1.1 µg/m³+14% |
| 119 | New BrightonPennsylvania, United States | 42 | 48 | +1.1 µg/m³+14% |
| 120 | ClaymontDelaware, United States | 41 | 47 | +1.1 µg/m³+15% |
| 121 | ChesterPennsylvania, United States | 41 | 47 | +1.1 µg/m³+15% |
| 122 | MasonOhio, United States | 36 | 42 | +1.1 µg/m³+17% |
| 123 | San FranciscoCalifornia, United States | 34 | 41 | +1.1 µg/m³+18% |
| 124 | DavisCalifornia, United States | 33 | 39 | +1.1 µg/m³+19% |
| 125 | Winter ParkFlorida, United States | 29 | 35 | +1.1 µg/m³+21% |
| 126 | PullmanWashington, United States | 27 | 33 | +1.1 µg/m³+22% |
| 127 | NorristownPennsylvania, United States | 41 | 46 | +1.0 µg/m³+14% |
| 128 | Corpus ChristiTexas, United States | 53 | 55 | +1.0 µg/m³+10% |
| 129 | BaytownTexas, United States | 53 | 55 | +1.0 µg/m³+10% |
| 130 | HighlandsTexas, United States | 53 | 55 | +1.0 µg/m³+10% |
| 131 | Kennedy TownshipPennsylvania, United States | 47 | 52 | +1.0 µg/m³+12% |
| 132 | TaylorMichigan, United States | 47 | 52 | +1.0 µg/m³+12% |
| 133 | CarlislePennsylvania, United States | 45 | 51 | +1.0 µg/m³+12% |
| 134 | SchlusserPennsylvania, United States | 45 | 51 | +1.0 µg/m³+12% |
| 135 | Saint AndrewsSouth Carolina, United States | 44 | 50 | +1.0 µg/m³+13% |
| 136 | Warrensville HeightsOhio, United States | 44 | 49 | +1.0 µg/m³+13% |
| 137 | SunnysideWashington, United States | 42 | 47 | +1.0 µg/m³+13% |
| 138 | EdmondOklahoma, United States | 41 | 47 | +1.0 µg/m³+14% |
| 139 | GreensburgPennsylvania, United States | 39 | 45 | +1.0 µg/m³+14% |
| 140 | PortlandMaine, United States | 38 | 44 | +1.0 µg/m³+14% |
| 141 | SharonvilleOhio, United States | 36 | 42 | +1.0 µg/m³+15% |
| 142 | HolbrookNew York, United States | 36 | 42 | +1.0 µg/m³+15% |
| 143 | AltamontOregon, United States | 36 | 42 | +1.0 µg/m³+15% |
| 144 | ButteMontana, United States | 36 | 41 | +1.0 µg/m³+16% |
| 145 | LivermoreCalifornia, United States | 33 | 38 | +1.0 µg/m³+17% |
| 146 | Ben LomondCalifornia, United States | 32 | 37 | +1.0 µg/m³+18% |
| 147 | SheridanWyoming, United States | 31 | 37 | +1.0 µg/m³+18% |
| 148 | RoseburgOregon, United States | 20 | 26 | +1.0 µg/m³+28% |
| 149 | WashingtonDistrict of Columbia, United States | 43 | 48 | +1.0 µg/m³+13% |
| 150 | Lake ElsinoreCalifornia, United States | 43 | 48 | +1.0 µg/m³+13% |
| 151 | SuperiorWisconsin, United States | 54 | 55 | +0.9 µg/m³+8% |
| 152 | HanfordCalifornia, United States | 53 | 55 | +0.9 µg/m³+9% |
| 153 | SandpointIdaho, United States | 52 | 54 | +0.9 µg/m³+9% |
| 154 | Live OakTexas, United States | 50 | 52 | +0.9 µg/m³+10% |
| 155 | Port HuronMichigan, United States | 48 | 52 | +0.9 µg/m³+10% |
| 156 | MilwaukeeWisconsin, United States | 47 | 52 | +0.9 µg/m³+11% |
| 157 | MontgomeryAlabama, United States | 47 | 51 | +0.9 µg/m³+11% |
| 158 | EastpointeMichigan, United States | 45 | 50 | +0.9 µg/m³+11% |
| 159 | TurlockCalifornia, United States | 42 | 47 | +0.9 µg/m³+12% |
| 160 | MonessenPennsylvania, United States | 41 | 46 | +0.9 µg/m³+12% |
| 161 | State CollegePennsylvania, United States | 39 | 44 | +0.9 µg/m³+13% |
| 162 | AshburnVirginia, United States | 39 | 44 | +0.9 µg/m³+13% |
| 163 | MaryvilleTennessee, United States | 38 | 43 | +0.9 µg/m³+13% |
| 164 | Arden-ArcadeCalifornia, United States | 38 | 43 | +0.9 µg/m³+13% |
| 165 | BayonneNew Jersey, United States | 33 | 38 | +0.9 µg/m³+15% |
| 166 | DallasOregon, United States | 18 | 23 | +0.9 µg/m³+27% |
| 167 | DecaturAlabama, United States | 41 | 46 | +0.9 µg/m³+12% |
| 168 | Toms RiverNew Jersey, United States | 38 | 43 | +0.9 µg/m³+13% |
| 169 | PoquosonVirginia, United States | 36 | 41 | +0.9 µg/m³+14% |
| 170 | Kailua-KonaHawaii, United States | 32 | 37 | +0.9 µg/m³+16% |
| 171 | WyomingMichigan, United States | 56 | 58 | +0.9 µg/m³+8% |
| 172 | DetroitMichigan, United States | 52 | 54 | +0.9 µg/m³+9% |
| 173 | ClevelandOhio, United States | 52 | 54 | +0.9 µg/m³+9% |
| 174 | FlorenceSouth Carolina, United States | 49 | 52 | +0.9 µg/m³+10% |
| 175 | DearbornMichigan, United States | 52 | 54 | +0.8 µg/m³+8% |
| 176 | WestervilleOhio, United States | 52 | 54 | +0.8 µg/m³+8% |
| 177 | San AntonioTexas, United States | 52 | 53 | +0.8 µg/m³+8% |
| 178 | WenatcheeWashington, United States | 52 | 53 | +0.8 µg/m³+8% |
| 179 | Fort WayneIndiana, United States | 51 | 53 | +0.8 µg/m³+9% |
| 180 | New HollandPennsylvania, United States | 48 | 52 | +0.8 µg/m³+9% |
| 181 | LansingMichigan, United States | 48 | 52 | +0.8 µg/m³+9% |
| 182 | HersheyPennsylvania, United States | 46 | 50 | +0.8 µg/m³+10% |
| 183 | WilkinsburgPennsylvania, United States | 45 | 49 | +0.8 µg/m³+10% |
| 184 | ManisteeMichigan, United States | 42 | 47 | +0.8 µg/m³+11% |
| 185 | JerseyvilleIllinois, United States | 37 | 41 | +0.8 µg/m³+12% |
| 186 | SacramentoCalifornia, United States | 34 | 38 | +0.8 µg/m³+13% |
| 187 | Coos BayOregon, United States | 19 | 23 | +0.8 µg/m³+24% |
| 188 | EwingNew Jersey, United States | 43 | 47 | +0.8 µg/m³+10% |
| 189 | MurraysvilleNorth Carolina, United States | 40 | 44 | +0.8 µg/m³+11% |
| 190 | Yuba CityCalifornia, United States | 39 | 43 | +0.8 µg/m³+11% |
| 191 | AllentownPennsylvania, United States | 38 | 42 | +0.8 µg/m³+12% |
| 192 | LoudonTennessee, United States | 36 | 40 | +0.8 µg/m³+12% |
| 193 | SalinasCalifornia, United States | 35 | 39 | +0.8 µg/m³+13% |
| 194 | TigardOregon, United States | 31 | 35 | +0.8 µg/m³+15% |
| 195 | San RafaelCalifornia, United States | 24 | 29 | +0.8 µg/m³+18% |
| 196 | BeavertonOregon, United States | 23 | 28 | +0.8 µg/m³+19% |
| 197 | SilvertonOregon, United States | 23 | 28 | +0.8 µg/m³+19% |
| 198 | JenisonMichigan, United States | 47 | 51 | +0.8 µg/m³+10% |
| 199 | MooreOklahoma, United States | 46 | 51 | +0.8 µg/m³+10% |
| 200 | Ponca CityOklahoma, United States | 44 | 48 | +0.8 µg/m³+10% |
| 201 | GreendaleWisconsin, United States | 48 | 52 | +0.7 µg/m³+8% |
| 202 | South MilwaukeeWisconsin, United States | 48 | 52 | +0.7 µg/m³+8% |
| 203 | New BaltimoreMichigan, United States | 48 | 51 | +0.7 µg/m³+8% |
| 204 | ClemmonsNorth Carolina, United States | 42 | 46 | +0.7 µg/m³+9% |
| 205 | CharlestonWest Virginia, United States | 40 | 44 | +0.7 µg/m³+10% |
| 206 | GreensboroNorth Carolina, United States | 39 | 43 | +0.7 µg/m³+10% |
| 207 | LawtonOklahoma, United States | 39 | 43 | +0.7 µg/m³+10% |
| 208 | HermitagePennsylvania, United States | 39 | 43 | +0.7 µg/m³+10% |
| 209 | Fort SmithArkansas, United States | 38 | 42 | +0.7 µg/m³+10% |
| 210 | TarboroNorth Carolina, United States | 38 | 42 | +0.7 µg/m³+10% |
| 211 | BridgeportConnecticut, United States | 38 | 42 | +0.7 µg/m³+10% |
| 212 | HermistonOregon, United States | 38 | 42 | +0.7 µg/m³+10% |
| 213 | Weirton HeightsWest Virginia, United States | 37 | 41 | +0.7 µg/m³+10% |
| 214 | GridleyCalifornia, United States | 36 | 40 | +0.7 µg/m³+11% |
| 215 | BrocktonMassachusetts, United States | 34 | 38 | +0.7 µg/m³+11% |
| 216 | Palm BayFlorida, United States | 28 | 32 | +0.7 µg/m³+14% |
| 217 | WoodburnOregon, United States | 24 | 28 | +0.7 µg/m³+16% |
| 218 | Forest GroveOregon, United States | 17 | 21 | +0.7 µg/m³+23% |
| 219 | BakersfieldCalifornia, United States | 55 | 56 | +0.7 µg/m³+6% |
| 220 | Grand RapidsMichigan, United States | 52 | 53 | +0.7 µg/m³+7% |
| 221 | SouthfieldMichigan, United States | 49 | 52 | +0.7 µg/m³+8% |
| 222 | Candler-McAfeeGeorgia, United States | 47 | 51 | +0.7 µg/m³+8% |
| 223 | HudsonvilleMichigan, United States | 47 | 51 | +0.7 µg/m³+8% |
| 224 | AtlantaGeorgia, United States | 46 | 50 | +0.7 µg/m³+8% |
| 225 | HendersonvilleTennessee, United States | 42 | 46 | +0.7 µg/m³+9% |
| 226 | Oak GroveKentucky, United States | 38 | 42 | +0.7 µg/m³+10% |
| 227 | ClarksvilleTennessee, United States | 38 | 42 | +0.7 µg/m³+10% |
| 228 | RichmondVirginia, United States | 38 | 42 | +0.7 µg/m³+10% |
| 229 | EugeneOregon, United States | 30 | 34 | +0.7 µg/m³+13% |
| 230 | SalemOregon, United States | 27 | 31 | +0.7 µg/m³+14% |
| 231 | BellinghamWashington, United States | 27 | 31 | +0.7 µg/m³+14% |
| 232 | TexarkanaTexas, United States | 51 | 52 | +0.6 µg/m³+7% |
| 233 | HuntsvilleAlabama, United States | 43 | 47 | +0.6 µg/m³+8% |
| 234 | PrienLouisiana, United States | 43 | 46 | +0.6 µg/m³+8% |
| 235 | SulphurLouisiana, United States | 43 | 46 | +0.6 µg/m³+8% |
| 236 | UniontownPennsylvania, United States | 39 | 43 | +0.6 µg/m³+8% |
| 237 | Mount VernonWashington, United States | 13 | 16 | +0.6 µg/m³+26% |
| 238 | Granite CityIllinois, United States | 51 | 52 | +0.6 µg/m³+7% |
| 239 | TecumsehMichigan, United States | 47 | 50 | +0.6 µg/m³+7% |
| 240 | BartlettTennessee, United States | 45 | 48 | +0.6 µg/m³+7% |
| 241 | BloomingtonIndiana, United States | 42 | 46 | +0.6 µg/m³+8% |
| 242 | Jersey CityNew Jersey, United States | 41 | 44 | +0.6 µg/m³+8% |
| 243 | HarrisonburgVirginia, United States | 40 | 43 | +0.6 µg/m³+8% |
| 244 | ColumbiaTennessee, United States | 38 | 42 | +0.6 µg/m³+9% |
| 245 | Atlantic CityNew Jersey, United States | 36 | 39 | +0.6 µg/m³+9% |
| 246 | ProsserWashington, United States | 34 | 38 | +0.6 µg/m³+10% |
| 247 | WeirtonWest Virginia, United States | 43 | 46 | +0.5 µg/m³+6% |
| 248 | Imperial BeachCalifornia, United States | 57 | 58 | +0.5 µg/m³+4% |
| 249 | RockfordIllinois, United States | 51 | 52 | +0.5 µg/m³+5% |
| 250 | PittsburghPennsylvania, United States | 47 | 49 | +0.5 µg/m³+6% |
| 251 | MidwayFlorida, United States | 47 | 49 | +0.5 µg/m³+6% |
| 252 | LawrencevilleGeorgia, United States | 46 | 48 | +0.5 µg/m³+6% |
| 253 | MiddlesboroKentucky, United States | 46 | 48 | +0.5 µg/m³+6% |
| 254 | GlenpoolOklahoma, United States | 45 | 48 | +0.5 µg/m³+6% |
| 255 | JenksOklahoma, United States | 45 | 48 | +0.5 µg/m³+6% |
| 256 | BessemerAlabama, United States | 42 | 44 | +0.5 µg/m³+7% |
| 257 | AthensTennessee, United States | 41 | 44 | +0.5 µg/m³+7% |
| 258 | OaklandCalifornia, United States | 41 | 43 | +0.5 µg/m³+7% |
| 259 | LemayMissouri, United States | 40 | 43 | +0.5 µg/m³+7% |
| 260 | AshevilleNorth Carolina, United States | 38 | 41 | +0.5 µg/m³+7% |
| 261 | RoanokeVirginia, United States | 36 | 39 | +0.5 µg/m³+8% |
| 262 | LincolnNebraska, United States | 36 | 38 | +0.5 µg/m³+8% |
| 263 | Stansbury parkUtah, United States | 32 | 34 | +0.5 µg/m³+9% |
| 264 | TooeleUtah, United States | 32 | 34 | +0.5 µg/m³+9% |
| 265 | PocatelloIdaho, United States | 31 | 33 | +0.5 µg/m³+9% |
| 266 | GreenOregon, United States | 26 | 29 | +0.5 µg/m³+11% |
| 267 | BremertonWashington, United States | 24 | 27 | +0.5 µg/m³+11% |
| 268 | PrestonIdaho, United States | 23 | 26 | +0.5 µg/m³+12% |
| 269 | North PortlandOregon, United States | 19 | 22 | +0.5 µg/m³+14% |
| 270 | McMinnvilleOregon, United States | 19 | 22 | +0.5 µg/m³+15% |
| 271 | Kennett SquarePennsylvania, United States | 43 | 46 | +0.5 µg/m³+6% |
| 272 | WindcrestTexas, United States | 53 | 54 | +0.4 µg/m³+4% |
| 273 | Calumet CityIllinois, United States | 52 | 53 | +0.4 µg/m³+4% |
| 274 | TulsaOklahoma, United States | 52 | 53 | +0.4 µg/m³+4% |
| 275 | CantonOhio, United States | 52 | 52 | +0.4 µg/m³+4% |
| 276 | McAlesterOklahoma, United States | 49 | 51 | +0.4 µg/m³+4% |
| 277 | AkronOhio, United States | 47 | 49 | +0.4 µg/m³+5% |
| 278 | OceansideCalifornia, United States | 46 | 48 | +0.4 µg/m³+5% |
| 279 | New York CityNew York, United States | 45 | 47 | +0.4 µg/m³+5% |
| 280 | BaltimoreMaryland, United States | 44 | 47 | +0.4 µg/m³+5% |
| 281 | YakimaWashington, United States | 44 | 46 | +0.4 µg/m³+5% |
| 282 | Saint MatthewsKentucky, United States | 42 | 44 | +0.4 µg/m³+5% |
| 283 | PatersonNew Jersey, United States | 41 | 43 | +0.4 µg/m³+5% |
| 284 | West Valley CityUtah, United States | 39 | 42 | +0.4 µg/m³+6% |
| 285 | BrandermillVirginia, United States | 39 | 42 | +0.4 µg/m³+6% |
| 286 | FillmoreCalifornia, United States | 35 | 37 | +0.4 µg/m³+6% |
| 287 | CookevilleTennessee, United States | 34 | 36 | +0.4 µg/m³+7% |
| 288 | HarrimanTennessee, United States | 34 | 36 | +0.4 µg/m³+7% |
| 289 | HuronCalifornia, United States | 33 | 36 | +0.4 µg/m³+7% |
| 290 | Rancho MurietaCalifornia, United States | 32 | 34 | +0.4 µg/m³+7% |
| 291 | ScottsbluffNebraska, United States | 28 | 31 | +0.4 µg/m³+8% |
| 292 | Grand JunctionColorado, United States | 28 | 30 | +0.4 µg/m³+8% |
| 293 | AlamosaColorado, United States | 28 | 30 | +0.4 µg/m³+8% |
| 294 | RidgecrestCalifornia, United States | 24 | 26 | +0.4 µg/m³+9% |
| 295 | AnchorageAlaska, United States | 21 | 23 | +0.4 µg/m³+11% |
| 296 | CorvallisOregon, United States | 16 | 18 | +0.4 µg/m³+14% |
| 297 | PennsaukenNew Jersey, United States | 43 | 46 | +0.4 µg/m³+5% |
| 298 | JacksonTennessee, United States | 43 | 46 | +0.4 µg/m³+5% |
| 299 | Jefferson HillsPennsylvania, United States | 43 | 45 | +0.4 µg/m³+5% |
| 300 | McKeesportPennsylvania, United States | 43 | 45 | +0.4 µg/m³+5% |
| 301 | RidgefieldWashington, United States | 23 | 26 | +0.4 µg/m³+10% |
| 302 | Salmon CreekWashington, United States | 23 | 26 | +0.4 µg/m³+10% |
| 303 | CalexicoCalifornia, United States | 51 | 52 | +0.4 µg/m³+4% |
| 304 | Valley StationKentucky, United States | 46 | 48 | +0.4 µg/m³+5% |
| 305 | EdinburgTexas, United States | 55 | 55 | +0.3 µg/m³+3% |
| 306 | WaterlooIowa, United States | 51 | 52 | +0.3 µg/m³+3% |
| 307 | DerbyKansas, United States | 48 | 50 | +0.3 µg/m³+3% |
| 308 | LouisvilleKentucky, United States | 48 | 50 | +0.3 µg/m³+3% |
| 309 | HaysvilleKansas, United States | 48 | 50 | +0.3 µg/m³+3% |
| 310 | DentsvilleSouth Carolina, United States | 45 | 47 | +0.3 µg/m³+4% |
| 311 | Winthrop HarborIllinois, United States | 44 | 46 | +0.3 µg/m³+4% |
| 312 | ZionIllinois, United States | 44 | 46 | +0.3 µg/m³+4% |
| 313 | ClaytonNorth Carolina, United States | 42 | 44 | +0.3 µg/m³+4% |
| 314 | ScaggsvilleMaryland, United States | 39 | 41 | +0.3 µg/m³+4% |
| 315 | New LondonConnecticut, United States | 34 | 36 | +0.3 µg/m³+5% |
| 316 | ColusaCalifornia, United States | 34 | 36 | +0.3 µg/m³+5% |
| 317 | ClevelandMississippi, United States | 43 | 45 | +0.3 µg/m³+4% |
| 318 | WaterburyConnecticut, United States | 39 | 41 | +0.3 µg/m³+4% |
| 319 | SavoyIllinois, United States | 38 | 40 | +0.3 µg/m³+4% |
| 320 | VallejoCalifornia, United States | 38 | 39 | +0.3 µg/m³+4% |
| 321 | El CentroCalifornia, United States | 36 | 37 | +0.3 µg/m³+5% |
| 322 | RenoNevada, United States | 36 | 37 | +0.3 µg/m³+5% |
| 323 | TacomaWashington, United States | 36 | 37 | +0.3 µg/m³+5% |
| 324 | TemeculaCalifornia, United States | 35 | 37 | +0.3 µg/m³+5% |
| 325 | Coconut CreekFlorida, United States | 33 | 34 | +0.3 µg/m³+5% |
| 326 | LewistownMontana, United States | 33 | 34 | +0.3 µg/m³+5% |
| 327 | Fall RiverMassachusetts, United States | 32 | 34 | +0.3 µg/m³+5% |
| 328 | CambridgeMaryland, United States | 32 | 33 | +0.3 µg/m³+5% |
| 329 | GilroyCalifornia, United States | 32 | 33 | +0.3 µg/m³+5% |
| 330 | TruckeeCalifornia, United States | 25 | 27 | +0.3 µg/m³+7% |
| 331 | ChehalisWashington, United States | 24 | 26 | +0.3 µg/m³+7% |
| 332 | TaosNew Mexico, United States | 21 | 23 | +0.3 µg/m³+8% |
| 333 | Franklin ParkIllinois, United States | 55 | 56 | +0.3 µg/m³+3% |
| 334 | West MifflinPennsylvania, United States | 52 | 53 | +0.3 µg/m³+3% |
| 335 | AnaheimCalifornia, United States | 52 | 53 | +0.3 µg/m³+3% |
| 336 | WarrenOhio, United States | 51 | 52 | +0.3 µg/m³+3% |
| 337 | ElkhartIndiana, United States | 49 | 51 | +0.3 µg/m³+3% |
| 338 | SavannahGeorgia, United States | 47 | 48 | +0.3 µg/m³+4% |
| 339 | CharlotteNorth Carolina, United States | 47 | 48 | +0.3 µg/m³+4% |
| 340 | DoltonIllinois, United States | 54 | 54 | +0.2 µg/m³+2% |
| 341 | SteubenvilleOhio, United States | 53 | 53 | +0.2 µg/m³+2% |
| 342 | North CharlestonSouth Carolina, United States | 48 | 49 | +0.2 µg/m³+2% |
| 343 | KnoxvilleTennessee, United States | 45 | 46 | +0.2 µg/m³+2% |
| 344 | RaleighNorth Carolina, United States | 42 | 43 | +0.2 µg/m³+3% |
| 345 | SpringfieldMissouri, United States | 41 | 42 | +0.2 µg/m³+3% |
| 346 | Salt Lake CityUtah, United States | 39 | 40 | +0.2 µg/m³+3% |
| 347 | HalfwayMaryland, United States | 37 | 38 | +0.2 µg/m³+3% |
| 348 | NicholasvilleKentucky, United States | 37 | 38 | +0.2 µg/m³+3% |
| 349 | GainesvilleFlorida, United States | 36 | 37 | +0.2 µg/m³+3% |
| 350 | Cottage GroveOregon, United States | 35 | 36 | +0.2 µg/m³+3% |
| 351 | OrlandoFlorida, United States | 35 | 36 | +0.2 µg/m³+3% |
| 352 | PikevilleKentucky, United States | 33 | 34 | +0.2 µg/m³+3% |
| 353 | LynnMassachusetts, United States | 32 | 33 | +0.2 µg/m³+3% |
| 354 | North BendWashington, United States | 25 | 26 | +0.2 µg/m³+4% |
| 355 | CentraliaWashington, United States | 24 | 25 | +0.2 µg/m³+5% |
| 356 | Hawaiian Paradise ParkHawaii, United States | 19 | 20 | +0.2 µg/m³+6% |
| 357 | HiloHawaii, United States | 19 | 20 | +0.2 µg/m³+6% |
| 358 | SpringdaleArkansas, United States | 53 | 53 | +0.2 µg/m³+2% |
| 359 | ValdostaGeorgia, United States | 52 | 53 | +0.2 µg/m³+2% |
| 360 | Warner RobinsGeorgia, United States | 52 | 52 | +0.2 µg/m³+2% |
| 361 | HattiesburgMississippi, United States | 47 | 48 | +0.2 µg/m³+2% |
| 362 | BuffaloNew York, United States | 47 | 48 | +0.2 µg/m³+2% |
| 363 | New AlbanyIndiana, United States | 44 | 46 | +0.2 µg/m³+2% |
| 364 | JasperIndiana, United States | 44 | 45 | +0.2 µg/m³+3% |
| 365 | Fort LeeNew Jersey, United States | 41 | 42 | +0.2 µg/m³+3% |
| 366 | EriePennsylvania, United States | 41 | 42 | +0.2 µg/m³+3% |
| 367 | Brigham CityUtah, United States | 33 | 34 | +0.2 µg/m³+3% |
| 368 | KalamazooMichigan, United States | 52 | 52 | +0.1 µg/m³+1% |
| 369 | GadsdenAlabama, United States | 48 | 49 | +0.1 µg/m³+1% |
| 370 | OwensboroKentucky, United States | 48 | 49 | +0.1 µg/m³+1% |
| 371 | SpringfieldOhio, United States | 48 | 49 | +0.1 µg/m³+1% |
| 372 | DentonTexas, United States | 48 | 49 | +0.1 µg/m³+1% |
| 373 | PainesvilleOhio, United States | 41 | 41 | +0.1 µg/m³+1% |
| 374 | HagerstownMaryland, United States | 38 | 38 | +0.1 µg/m³+1% |
| 375 | GreeleyColorado, United States | 37 | 37 | +0.1 µg/m³+2% |
| 376 | RentonWashington, United States | 35 | 36 | +0.1 µg/m³+2% |
| 377 | Idaho FallsIdaho, United States | 29 | 30 | +0.1 µg/m³+2% |
| 378 | SolvangCalifornia, United States | 27 | 27 | +0.1 µg/m³+2% |
| 379 | SunnyvaleCalifornia, United States | 17 | 18 | +0.1 µg/m³+3% |
| 380 | NewportOregon, United States | 16 | 16 | +0.1 µg/m³+4% |
| 381 | Great FallsMontana, United States | 54 | 54 | +0.1 µg/m³+1% |
| 382 | WaukeshaWisconsin, United States | 52 | 52 | +0.1 µg/m³+1% |
| 383 | PortageIndiana, United States | 52 | 52 | +0.1 µg/m³+1% |
| 384 | Green BayWisconsin, United States | 51 | 52 | +0.1 µg/m³+1% |
| 385 | MoundsvilleWest Virginia, United States | 50 | 51 | +0.1 µg/m³+1% |
| 386 | EvansvilleIndiana, United States | 48 | 48 | +0.1 µg/m³+1% |
| 387 | ElizabethNew Jersey, United States | 46 | 47 | +0.1 µg/m³+1% |
| 388 | GalvestonTexas, United States | 45 | 46 | +0.1 µg/m³+1% |
| 389 | West JordanUtah, United States | 44 | 44 | +0.1 µg/m³+1% |
| 390 | ScrantonPennsylvania, United States | 43 | 43 | +0.1 µg/m³+1% |
| 391 | Roanoke RapidsNorth Carolina, United States | 41 | 42 | +0.1 µg/m³+1% |
| 392 | GahannaOhio, United States | 41 | 42 | +0.1 µg/m³+1% |
| 393 | New AlbanyOhio, United States | 41 | 42 | +0.1 µg/m³+1% |
| 394 | TrentonNew Jersey, United States | 40 | 41 | +0.1 µg/m³+1% |
| 395 | Fort ThomasKentucky, United States | 37 | 38 | +0.1 µg/m³+1% |
| 396 | Highland HeightsKentucky, United States | 37 | 38 | +0.1 µg/m³+1% |
| 397 | GaltCalifornia, United States | 36 | 37 | +0.1 µg/m³+2% |
| 398 | AuburnWashington, United States | 36 | 36 | +0.1 µg/m³+2% |
| 399 | Safety HarborFlorida, United States | 34 | 35 | +0.1 µg/m³+2% |
| 400 | RockvilleMaryland, United States | 33 | 34 | +0.1 µg/m³+2% |
| 401 | MagnaUtah, United States | 33 | 34 | +0.1 µg/m³+2% |
| 402 | OjaiCalifornia, United States | 32 | 32 | +0.1 µg/m³+2% |
| 403 | PortlandOregon, United States | 26 | 27 | +0.1 µg/m³+2% |
The 374 cities that got cleaner, biggest fall first
| # | City | 2025 | 2026 | Change |
|---|---|---|---|---|
| 1 | Sunland ParkNew Mexico, United States | 62 | 44 | −6.8 µg/m³−46% |
| 2 | El PasoTexas, United States | 66 | 55 | −5.7 µg/m³−34% |
| 3 | AnacortesWashington, United States | 42 | 15 | −4.9 µg/m³−64% |
| 4 | AnthonyNew Mexico, United States | 58 | 46 | −4.8 µg/m³−37% |
| 5 | ColumbiaMissouri, United States | 57 | 44 | −4.4 µg/m³−35% |
| 6 | SocorroTexas, United States | 60 | 52 | −4.2 µg/m³−30% |
| 7 | MankatoMinnesota, United States | 55 | 42 | −3.8 µg/m³−33% |
| 8 | LompocCalifornia, United States | 38 | 19 | −3.4 µg/m³−49% |
| 9 | HelenaMontana, United States | 52 | 36 | −3.4 µg/m³−35% |
| 10 | Helena Valley West CentralMontana, United States | 52 | 36 | −3.3 µg/m³−34% |
| 11 | BrookingsSouth Dakota, United States | 53 | 39 | −3.2 µg/m³−31% |
| 12 | Las CrucesNew Mexico, United States | 44 | 27 | −3.2 µg/m³−40% |
| 13 | BlairNebraska, United States | 39 | 22 | −3.0 µg/m³−43% |
| 14 | GaryIndiana, United States | 56 | 48 | −3.0 µg/m³−26% |
| 15 | Red HillSouth Carolina, United States | 47 | 31 | −2.9 µg/m³−35% |
| 16 | ConwaySouth Carolina, United States | 47 | 31 | −2.9 µg/m³−35% |
| 17 | Santa BarbaraCalifornia, United States | 54 | 43 | −2.9 µg/m³−27% |
| 18 | VirginiaMinnesota, United States | 54 | 43 | −2.9 µg/m³−27% |
| 19 | Detroit LakesMinnesota, United States | 52 | 37 | −2.8 µg/m³−30% |
| 20 | LanderWyoming, United States | 36 | 22 | −2.6 µg/m³−40% |
| 21 | ChicoCalifornia, United States | 43 | 29 | −2.6 µg/m³−33% |
| 22 | LafayetteLouisiana, United States | 48 | 34 | −2.6 µg/m³−30% |
| 23 | Santa MonicaCalifornia, United States | 57 | 52 | −2.6 µg/m³−21% |
| 24 | MarshallMinnesota, United States | 46 | 32 | −2.5 µg/m³−30% |
| 25 | West FargoNorth Dakota, United States | 52 | 38 | −2.5 µg/m³−27% |
| 26 | BadgerAlaska, United States | 53 | 43 | −2.4 µg/m³−24% |
| 27 | ConroeTexas, United States | 55 | 51 | −2.3 µg/m³−20% |
| 28 | AberdeenSouth Dakota, United States | 37 | 24 | −2.3 µg/m³−35% |
| 29 | HobbsNew Mexico, United States | 51 | 39 | −2.2 µg/m³−24% |
| 30 | MinneapolisMinnesota, United States | 53 | 46 | −2.2 µg/m³−21% |
| 31 | MaranaArizona, United States | 37 | 25 | −2.2 µg/m³−33% |
| 32 | Sioux FallsSouth Dakota, United States | 37 | 25 | −2.2 µg/m³−33% |
| 33 | BozemanMontana, United States | 44 | 32 | −2.2 µg/m³−28% |
| 34 | RochesterMinnesota, United States | 52 | 41 | −2.2 µg/m³−23% |
| 35 | FairbanksAlaska, United States | 45 | 33 | −2.1 µg/m³−26% |
| 36 | BerkeleyCalifornia, United States | 51 | 39 | −2.1 µg/m³−23% |
| 37 | Apple ValleyMinnesota, United States | 51 | 39 | −2.1 µg/m³−23% |
| 38 | HoustonTexas, United States | 57 | 53 | −2.1 µg/m³−17% |
| 39 | FolsomCalifornia, United States | 38 | 27 | −2.0 µg/m³−29% |
| 40 | HueytownAlabama, United States | 44 | 33 | −2.0 µg/m³−25% |
| 41 | FairfieldAlabama, United States | 44 | 33 | −2.0 µg/m³−25% |
| 42 | Grand IslandNebraska, United States | 39 | 28 | −1.9 µg/m³−27% |
| 43 | Des MoinesIowa, United States | 51 | 41 | −1.9 µg/m³−20% |
| 44 | ShakopeeMinnesota, United States | 52 | 42 | −1.9 µg/m³−20% |
| 45 | Saint JosephMissouri, United States | 53 | 45 | −1.9 µg/m³−19% |
| 46 | BurbankCalifornia, United States | 55 | 51 | −1.9 µg/m³−17% |
| 47 | AlbuquerqueNew Mexico, United States | 44 | 34 | −1.8 µg/m³−22% |
| 48 | OregonOhio, United States | 54 | 49 | −1.8 µg/m³−17% |
| 49 | SchrieverLouisiana, United States | 51 | 42 | −1.7 µg/m³−18% |
| 50 | BellevueNebraska, United States | 41 | 31 | −1.7 µg/m³−23% |
| 51 | Saint PaulMinnesota, United States | 52 | 44 | −1.7 µg/m³−18% |
| 52 | BurnsvilleMinnesota, United States | 52 | 44 | −1.7 µg/m³−18% |
| 53 | NogalesArizona, United States | 53 | 47 | −1.7 µg/m³−17% |
| 54 | BirminghamAlabama, United States | 54 | 50 | −1.7 µg/m³−16% |
| 55 | PawtucketRhode Island, United States | 38 | 29 | −1.6 µg/m³−23% |
| 56 | MarvinNorth Carolina, United States | 40 | 31 | −1.6 µg/m³−22% |
| 57 | La VistaNebraska, United States | 41 | 32 | −1.6 µg/m³−22% |
| 58 | OconomowocWisconsin, United States | 58 | 55 | −1.6 µg/m³−12% |
| 59 | Palo AltoCalifornia, United States | 26 | 18 | −1.5 µg/m³−32% |
| 60 | VermillionSouth Dakota, United States | 33 | 24 | −1.5 µg/m³−25% |
| 61 | BeatriceNebraska, United States | 43 | 35 | −1.5 µg/m³−19% |
| 62 | Saint MichaelMinnesota, United States | 48 | 39 | −1.5 µg/m³−17% |
| 63 | HollandMichigan, United States | 52 | 46 | −1.5 µg/m³−15% |
| 64 | BraidwoodIllinois, United States | 48 | 40 | −1.5 µg/m³−17% |
| 65 | GuadalupeCalifornia, United States | 46 | 38 | −1.4 µg/m³−17% |
| 66 | WatertownSouth Dakota, United States | 45 | 37 | −1.4 µg/m³−17% |
| 67 | SeabrookTexas, United States | 51 | 43 | −1.4 µg/m³−15% |
| 68 | La PorteTexas, United States | 51 | 43 | −1.4 µg/m³−15% |
| 69 | West MemphisArkansas, United States | 57 | 54 | −1.4 µg/m³−11% |
| 70 | MarionArkansas, United States | 57 | 54 | −1.4 µg/m³−11% |
| 71 | NipomoCalifornia, United States | 46 | 39 | −1.3 µg/m³−16% |
| 72 | Los AngelesCalifornia, United States | 57 | 55 | −1.3 µg/m³−10% |
| 73 | Rock SpringsWyoming, United States | 26 | 19 | −1.3 µg/m³−28% |
| 74 | UticaNew York, United States | 37 | 29 | −1.3 µg/m³−20% |
| 75 | ArvadaColorado, United States | 41 | 33 | −1.3 µg/m³−18% |
| 76 | BrainerdMinnesota, United States | 48 | 41 | −1.3 µg/m³−15% |
| 77 | Thousand OaksCalifornia, United States | 39 | 32 | −1.2 µg/m³−17% |
| 78 | Saint CloudMinnesota, United States | 47 | 40 | −1.2 µg/m³−14% |
| 79 | WoodlandCalifornia, United States | 49 | 43 | −1.2 µg/m³−13% |
| 80 | Summerlin SouthNevada, United States | 28 | 22 | −1.2 µg/m³−24% |
| 81 | LafayetteIndiana, United States | 48 | 41 | −1.2 µg/m³−14% |
| 82 | Eau ClaireWisconsin, United States | 52 | 46 | −1.2 µg/m³−13% |
| 83 | Elmwood ParkIllinois, United States | 61 | 59 | −1.2 µg/m³−8% |
| 84 | YumaArizona, United States | 44 | 38 | −1.1 µg/m³−14% |
| 85 | VictorvilleCalifornia, United States | 49 | 43 | −1.1 µg/m³−13% |
| 86 | MadisonWisconsin, United States | 49 | 43 | −1.1 µg/m³−12% |
| 87 | CasperWyoming, United States | 23 | 17 | −1.1 µg/m³−26% |
| 88 | Sweet HomeOregon, United States | 23 | 17 | −1.1 µg/m³−27% |
| 89 | LyndenWashington, United States | 33 | 27 | −1.1 µg/m³−18% |
| 90 | WillowsCalifornia, United States | 36 | 30 | −1.1 µg/m³−17% |
| 91 | PittsfieldMassachusetts, United States | 37 | 31 | −1.1 µg/m³−17% |
| 92 | UkiahCalifornia, United States | 41 | 34 | −1.1 µg/m³−15% |
| 93 | MolineIllinois, United States | 48 | 42 | −1.1 µg/m³−13% |
| 94 | Cedar RapidsIowa, United States | 48 | 42 | −1.1 µg/m³−13% |
| 95 | AltoonaWisconsin, United States | 52 | 46 | −1.1 µg/m³−12% |
| 96 | JolietIllinois, United States | 52 | 48 | −1.1 µg/m³−11% |
| 97 | Port ArthurTexas, United States | 52 | 48 | −1.1 µg/m³−11% |
| 98 | New CityNew York, United States | 33 | 28 | −1.0 µg/m³−17% |
| 99 | Mount IvyNew York, United States | 33 | 28 | −1.0 µg/m³−17% |
| 100 | DenverColorado, United States | 37 | 32 | −1.0 µg/m³−15% |
| 101 | ProvidenceRhode Island, United States | 38 | 32 | −1.0 µg/m³−15% |
| 102 | North AdamsMassachusetts, United States | 39 | 33 | −1.0 µg/m³−14% |
| 103 | MesaArizona, United States | 39 | 34 | −1.0 µg/m³−14% |
| 104 | Belle GladeFlorida, United States | 39 | 34 | −1.0 µg/m³−14% |
| 105 | McDonoughGeorgia, United States | 40 | 34 | −1.0 µg/m³−14% |
| 106 | ThorntonColorado, United States | 43 | 37 | −1.0 µg/m³−13% |
| 107 | ArnoldMissouri, United States | 43 | 38 | −1.0 µg/m³−13% |
| 108 | BloomingtonIllinois, United States | 45 | 39 | −1.0 µg/m³−12% |
| 109 | SewellNew Jersey, United States | 47 | 41 | −1.0 µg/m³−12% |
| 110 | PaulsboroNew Jersey, United States | 47 | 41 | −1.0 µg/m³−12% |
| 111 | CloquetMinnesota, United States | 47 | 42 | −1.0 µg/m³−12% |
| 112 | OdessaTexas, United States | 51 | 46 | −1.0 µg/m³−11% |
| 113 | PasadenaTexas, United States | 54 | 52 | −1.0 µg/m³−9% |
| 114 | Port IsabelTexas, United States | 58 | 56 | −1.0 µg/m³−8% |
| 115 | Green ValleyArizona, United States | 23 | 17 | −1.0 µg/m³−24% |
| 116 | EnterpriseNevada, United States | 29 | 24 | −0.9 µg/m³−17% |
| 117 | BoulderColorado, United States | 32 | 27 | −0.9 µg/m³−16% |
| 118 | Presque IsleMaine, United States | 33 | 28 | −0.9 µg/m³−15% |
| 119 | White PlainsNew York, United States | 33 | 28 | −0.9 µg/m³−15% |
| 120 | HighlandUtah, United States | 36 | 31 | −0.9 µg/m³−14% |
| 121 | Cedar HillsUtah, United States | 36 | 31 | −0.9 µg/m³−14% |
| 122 | EnochUtah, United States | 36 | 31 | −0.9 µg/m³−14% |
| 123 | Cedar CityUtah, United States | 36 | 31 | −0.9 µg/m³−14% |
| 124 | OxnardCalifornia, United States | 39 | 34 | −0.9 µg/m³−13% |
| 125 | El RioCalifornia, United States | 39 | 34 | −0.9 µg/m³−13% |
| 126 | Casa GrandeArizona, United States | 44 | 39 | −0.9 µg/m³−11% |
| 127 | DavenportIowa, United States | 47 | 42 | −0.9 µg/m³−11% |
| 128 | San MarcosTexas, United States | 50 | 45 | −0.9 µg/m³−10% |
| 129 | Santa ClaritaCalifornia, United States | 51 | 47 | −0.9 µg/m³−10% |
| 130 | TorranceCalifornia, United States | 52 | 48 | −0.9 µg/m³−9% |
| 131 | Lacy-LakeviewTexas, United States | 53 | 52 | −0.9 µg/m³−9% |
| 132 | BanningCalifornia, United States | 42 | 37 | −0.9 µg/m³−12% |
| 133 | ValricoFlorida, United States | 43 | 38 | −0.9 µg/m³−12% |
| 134 | AnkenyIowa, United States | 45 | 40 | −0.9 µg/m³−11% |
| 135 | BlaineMinnesota, United States | 48 | 43 | −0.9 µg/m³−10% |
| 136 | Baton RougeLouisiana, United States | 50 | 46 | −0.8 µg/m³−9% |
| 137 | Michigan CityIndiana, United States | 52 | 48 | −0.8 µg/m³−8% |
| 138 | PerrysburgOhio, United States | 52 | 48 | −0.8 µg/m³−8% |
| 139 | MaumeeOhio, United States | 52 | 48 | −0.8 µg/m³−8% |
| 140 | GlendoraCalifornia, United States | 53 | 51 | −0.8 µg/m³−8% |
| 141 | NewburghNew York, United States | 34 | 30 | −0.8 µg/m³−13% |
| 142 | CrestlineCalifornia, United States | 37 | 32 | −0.8 µg/m³−12% |
| 143 | Grants PassOregon, United States | 38 | 33 | −0.8 µg/m³−12% |
| 144 | LongmontColorado, United States | 39 | 35 | −0.8 µg/m³−11% |
| 145 | Spanish ForkUtah, United States | 40 | 36 | −0.8 µg/m³−11% |
| 146 | OmahaNebraska, United States | 41 | 36 | −0.8 µg/m³−11% |
| 147 | OremUtah, United States | 43 | 38 | −0.8 µg/m³−10% |
| 148 | Kansas CityMissouri, United States | 43 | 38 | −0.8 µg/m³−10% |
| 149 | IndianapolisIndiana, United States | 53 | 52 | −0.8 µg/m³−8% |
| 150 | MiamiFlorida, United States | 46 | 42 | −0.7 µg/m³−8% |
| 151 | PhoenixArizona, United States | 49 | 45 | −0.7 µg/m³−8% |
| 152 | PierreSouth Dakota, United States | 29 | 26 | −0.7 µg/m³−13% |
| 153 | MoscowIdaho, United States | 39 | 35 | −0.7 µg/m³−10% |
| 154 | LeawoodKansas, United States | 41 | 37 | −0.7 µg/m³−9% |
| 155 | FairhopeAlabama, United States | 42 | 38 | −0.7 µg/m³−9% |
| 156 | IndioCalifornia, United States | 44 | 41 | −0.7 µg/m³−9% |
| 157 | Heber CityUtah, United States | 31 | 27 | −0.7 µg/m³−12% |
| 158 | TracyCalifornia, United States | 34 | 30 | −0.7 µg/m³−11% |
| 159 | GreenfieldMassachusetts, United States | 39 | 36 | −0.7 µg/m³−10% |
| 160 | RochesterNew York, United States | 42 | 38 | −0.7 µg/m³−9% |
| 161 | ToppenishWashington, United States | 48 | 44 | −0.7 µg/m³−8% |
| 162 | Iowa CityIowa, United States | 48 | 44 | −0.7 µg/m³−8% |
| 163 | KaufmanTexas, United States | 48 | 44 | −0.7 µg/m³−8% |
| 164 | GainesvilleGeorgia, United States | 50 | 46 | −0.7 µg/m³−8% |
| 165 | East Saint LouisIllinois, United States | 51 | 47 | −0.7 µg/m³−8% |
| 166 | CincinnatiOhio, United States | 52 | 49 | −0.7 µg/m³−7% |
| 167 | Mission BendTexas, United States | 52 | 50 | −0.7 µg/m³−7% |
| 168 | LincolnwoodIllinois, United States | 54 | 53 | −0.7 µg/m³−7% |
| 169 | Missouri CityTexas, United States | 52 | 51 | −0.6 µg/m³−6% |
| 170 | VernalUtah, United States | 29 | 26 | −0.6 µg/m³−12% |
| 171 | Apache JunctionArizona, United States | 30 | 27 | −0.6 µg/m³−11% |
| 172 | SyracuseNew York, United States | 37 | 34 | −0.6 µg/m³−9% |
| 173 | Fort MyersFlorida, United States | 38 | 35 | −0.6 µg/m³−9% |
| 174 | AlpineCalifornia, United States | 38 | 35 | −0.6 µg/m³−9% |
| 175 | PascagoulaMississippi, United States | 44 | 41 | −0.6 µg/m³−8% |
| 176 | LockhartTexas, United States | 46 | 43 | −0.6 µg/m³−7% |
| 177 | HurricaneUtah, United States | 28 | 25 | −0.6 µg/m³−12% |
| 178 | North ValleyNew Mexico, United States | 31 | 27 | −0.6 µg/m³−11% |
| 179 | BenningtonVermont, United States | 31 | 28 | −0.6 µg/m³−11% |
| 180 | Crescent CityCalifornia, United States | 34 | 31 | −0.6 µg/m³−10% |
| 181 | Casas AdobesArizona, United States | 34 | 31 | −0.6 µg/m³−10% |
| 182 | Rio RanchoNew Mexico, United States | 35 | 32 | −0.6 µg/m³−10% |
| 183 | FraminghamMassachusetts, United States | 37 | 33 | −0.6 µg/m³−9% |
| 184 | HartfordVermont, United States | 37 | 33 | −0.6 µg/m³−9% |
| 185 | KeeneNew Hampshire, United States | 38 | 34 | −0.6 µg/m³−9% |
| 186 | LibertyMissouri, United States | 39 | 36 | −0.6 µg/m³−9% |
| 187 | KearneyMissouri, United States | 39 | 36 | −0.6 µg/m³−9% |
| 188 | TucsonArizona, United States | 39 | 36 | −0.6 µg/m³−8% |
| 189 | White OakOhio, United States | 41 | 37 | −0.6 µg/m³−8% |
| 190 | DentOhio, United States | 41 | 37 | −0.6 µg/m³−8% |
| 191 | Daytona BeachFlorida, United States | 41 | 37 | −0.6 µg/m³−8% |
| 192 | KennerLouisiana, United States | 46 | 42 | −0.6 µg/m³−7% |
| 193 | OlatheKansas, United States | 48 | 44 | −0.6 µg/m³−7% |
| 194 | DecaturIllinois, United States | 48 | 45 | −0.6 µg/m³−7% |
| 195 | Kansas CityKansas, United States | 49 | 46 | −0.6 µg/m³−7% |
| 196 | CaryIllinois, United States | 51 | 47 | −0.6 µg/m³−7% |
| 197 | StocktonCalifornia, United States | 46 | 43 | −0.5 µg/m³−6% |
| 198 | GilletteWyoming, United States | 26 | 23 | −0.5 µg/m³−11% |
| 199 | LaconiaNew Hampshire, United States | 27 | 24 | −0.5 µg/m³−10% |
| 200 | HendersonNevada, United States | 27 | 24 | −0.5 µg/m³−10% |
| 201 | Carson CityNevada, United States | 28 | 26 | −0.5 µg/m³−10% |
| 202 | VacavilleCalifornia, United States | 29 | 27 | −0.5 µg/m³−9% |
| 203 | LamarColorado, United States | 32 | 29 | −0.5 µg/m³−9% |
| 204 | WindsorColorado, United States | 33 | 31 | −0.5 µg/m³−8% |
| 205 | East LakeFlorida, United States | 34 | 31 | −0.5 µg/m³−8% |
| 206 | LubbockTexas, United States | 35 | 32 | −0.5 µg/m³−8% |
| 207 | GlendaleArizona, United States | 38 | 35 | −0.5 µg/m³−7% |
| 208 | RaymoreMissouri, United States | 38 | 35 | −0.5 µg/m³−7% |
| 209 | DavieFlorida, United States | 38 | 35 | −0.5 µg/m³−7% |
| 210 | BostonMassachusetts, United States | 38 | 36 | −0.5 µg/m³−7% |
| 211 | BrawleyCalifornia, United States | 40 | 37 | −0.5 µg/m³−7% |
| 212 | St. PetersburgFlorida, United States | 41 | 38 | −0.5 µg/m³−7% |
| 213 | DurhamNorth Carolina, United States | 41 | 38 | −0.5 µg/m³−7% |
| 214 | Palm CityFlorida, United States | 41 | 38 | −0.5 µg/m³−7% |
| 215 | AlbanyNew York, United States | 45 | 42 | −0.5 µg/m³−6% |
| 216 | BeltonTexas, United States | 48 | 45 | −0.5 µg/m³−6% |
| 217 | Venice GardensFlorida, United States | 48 | 46 | −0.5 µg/m³−6% |
| 218 | VeniceFlorida, United States | 48 | 46 | −0.5 µg/m³−6% |
| 219 | SandersvilleGeorgia, United States | 50 | 47 | −0.5 µg/m³−6% |
| 220 | East ChicagoIndiana, United States | 52 | 49 | −0.5 µg/m³−5% |
| 221 | ColumbusGeorgia, United States | 52 | 51 | −0.5 µg/m³−5% |
| 222 | HammondIndiana, United States | 53 | 52 | −0.5 µg/m³−5% |
| 223 | TallahasseeFlorida, United States | 53 | 52 | −0.5 µg/m³−5% |
| 224 | Beaver FallsPennsylvania, United States | 53 | 52 | −0.5 µg/m³−5% |
| 225 | WichitaKansas, United States | 53 | 52 | −0.5 µg/m³−5% |
| 226 | RedfordMichigan, United States | 56 | 55 | −0.5 µg/m³−4% |
| 227 | Spring ValleyNevada, United States | 28 | 26 | −0.4 µg/m³−8% |
| 228 | HavreMontana, United States | 29 | 27 | −0.4 µg/m³−8% |
| 229 | Picnic Point-North LynnwoodWashington, United States | 33 | 31 | −0.4 µg/m³−7% |
| 230 | Red BluffCalifornia, United States | 33 | 31 | −0.4 µg/m³−7% |
| 231 | North ChicopeeMassachusetts, United States | 33 | 31 | −0.4 µg/m³−7% |
| 232 | ReddingCalifornia, United States | 34 | 32 | −0.4 µg/m³−6% |
| 233 | YrekaCalifornia, United States | 36 | 33 | −0.4 µg/m³−6% |
| 234 | TempeArizona, United States | 38 | 36 | −0.4 µg/m³−6% |
| 235 | Deerfield BeachFlorida, United States | 39 | 37 | −0.4 µg/m³−6% |
| 236 | Oak RidgeFlorida, United States | 42 | 39 | −0.4 µg/m³−5% |
| 237 | MedfordOregon, United States | 42 | 39 | −0.4 µg/m³−5% |
| 238 | New HavenConnecticut, United States | 42 | 39 | −0.4 µg/m³−5% |
| 239 | HartfordConnecticut, United States | 43 | 41 | −0.4 µg/m³−5% |
| 240 | ClintonIowa, United States | 48 | 46 | −0.4 µg/m³−5% |
| 241 | Ponte Vedra BeachFlorida, United States | 49 | 47 | −0.4 µg/m³−4% |
| 242 | ColumbusOhio, United States | 52 | 52 | −0.4 µg/m³−4% |
| 243 | AlbanyGeorgia, United States | 52 | 52 | −0.4 µg/m³−4% |
| 244 | Wells BranchTexas, United States | 53 | 52 | −0.4 µg/m³−4% |
| 245 | AugustaGeorgia, United States | 54 | 53 | −0.4 µg/m³−4% |
| 246 | WorlandWyoming, United States | 20 | 18 | −0.4 µg/m³−11% |
| 247 | RanchettesWyoming, United States | 20 | 18 | −0.4 µg/m³−11% |
| 248 | CheyenneWyoming, United States | 20 | 18 | −0.4 µg/m³−11% |
| 249 | SheltonWashington, United States | 27 | 24 | −0.4 µg/m³−8% |
| 250 | UxbridgeMassachusetts, United States | 32 | 30 | −0.4 µg/m³−7% |
| 251 | Spanish SpringsNevada, United States | 32 | 30 | −0.4 µg/m³−7% |
| 252 | North AuburnCalifornia, United States | 35 | 33 | −0.4 µg/m³−6% |
| 253 | WorcesterMassachusetts, United States | 35 | 33 | −0.4 µg/m³−6% |
| 254 | Four CornersFlorida, United States | 38 | 36 | −0.4 µg/m³−6% |
| 255 | OceanoCalifornia, United States | 41 | 38 | −0.4 µg/m³−5% |
| 256 | Arroyo GrandeCalifornia, United States | 41 | 38 | −0.4 µg/m³−5% |
| 257 | LindenNew Jersey, United States | 45 | 43 | −0.4 µg/m³−5% |
| 258 | PeoriaIllinois, United States | 52 | 51 | −0.4 µg/m³−4% |
| 259 | LancasterCalifornia, United States | 30 | 28 | −0.3 µg/m³−6% |
| 260 | Port AngelesWashington, United States | 33 | 31 | −0.3 µg/m³−5% |
| 261 | BarabooWisconsin, United States | 44 | 42 | −0.3 µg/m³−4% |
| 262 | SpringfieldIllinois, United States | 44 | 42 | −0.3 µg/m³−4% |
| 263 | PowayCalifornia, United States | 46 | 44 | −0.3 µg/m³−4% |
| 264 | El CajonCalifornia, United States | 49 | 47 | −0.3 µg/m³−3% |
| 265 | NapervilleIllinois, United States | 52 | 52 | −0.3 µg/m³−3% |
| 266 | BridgeviewIllinois, United States | 57 | 57 | −0.3 µg/m³−2% |
| 267 | Camp VerdeArizona, United States | 28 | 27 | −0.3 µg/m³−6% |
| 268 | Colorado SpringsColorado, United States | 28 | 27 | −0.3 µg/m³−6% |
| 269 | WareMassachusetts, United States | 31 | 29 | −0.3 µg/m³−5% |
| 270 | MilfordMassachusetts, United States | 32 | 31 | −0.3 µg/m³−5% |
| 271 | Lake MaryFlorida, United States | 35 | 33 | −0.3 µg/m³−5% |
| 272 | Fort CollinsColorado, United States | 36 | 34 | −0.3 µg/m³−5% |
| 273 | WellingtonFlorida, United States | 36 | 34 | −0.3 µg/m³−5% |
| 274 | Sarasota SpringsFlorida, United States | 36 | 34 | −0.3 µg/m³−5% |
| 275 | SarasotaFlorida, United States | 36 | 34 | −0.3 µg/m³−5% |
| 276 | RooseveltUtah, United States | 37 | 35 | −0.3 µg/m³−5% |
| 277 | Las VegasNevada, United States | 37 | 35 | −0.3 µg/m³−5% |
| 278 | KingsportTennessee, United States | 37 | 36 | −0.3 µg/m³−4% |
| 279 | SpringfieldMassachusetts, United States | 39 | 38 | −0.3 µg/m³−4% |
| 280 | MoabUtah, United States | 40 | 38 | −0.3 µg/m³−4% |
| 281 | DyersburgTennessee, United States | 41 | 39 | −0.3 µg/m³−4% |
| 282 | PaducahKentucky, United States | 42 | 40 | −0.3 µg/m³−4% |
| 283 | Simi ValleyCalifornia, United States | 43 | 42 | −0.3 µg/m³−4% |
| 284 | ChampaignIllinois, United States | 44 | 43 | −0.3 µg/m³−4% |
| 285 | MuscatineIowa, United States | 44 | 43 | −0.3 µg/m³−4% |
| 286 | HickoryNorth Carolina, United States | 45 | 43 | −0.3 µg/m³−4% |
| 287 | GreenvilleSouth Carolina, United States | 48 | 47 | −0.3 µg/m³−3% |
| 288 | MillcreekUtah, United States | 51 | 49 | −0.3 µg/m³−3% |
| 289 | Des PlainesIllinois, United States | 52 | 51 | −0.3 µg/m³−3% |
| 290 | TrussvilleAlabama, United States | 46 | 45 | −0.2 µg/m³−2% |
| 291 | LeedsAlabama, United States | 46 | 45 | −0.2 µg/m³−2% |
| 292 | St. LouisMissouri, United States | 49 | 48 | −0.2 µg/m³−2% |
| 293 | Bay CityMichigan, United States | 51 | 51 | −0.2 µg/m³−2% |
| 294 | Fort WorthTexas, United States | 52 | 51 | −0.2 µg/m³−2% |
| 295 | San DiegoCalifornia, United States | 52 | 52 | −0.2 µg/m³−2% |
| 296 | DuluthMinnesota, United States | 52 | 52 | −0.2 µg/m³−2% |
| 297 | LexingtonNorth Carolina, United States | 52 | 52 | −0.2 µg/m³−2% |
| 298 | ComptonCalifornia, United States | 55 | 55 | −0.2 µg/m³−2% |
| 299 | FontanaCalifornia, United States | 56 | 56 | −0.2 µg/m³−2% |
| 300 | BrookingsOregon, United States | 17 | 16 | −0.2 µg/m³−6% |
| 301 | HollisterCalifornia, United States | 27 | 26 | −0.2 µg/m³−4% |
| 302 | Ken CarylColorado, United States | 28 | 27 | −0.2 µg/m³−4% |
| 303 | ShorelineWashington, United States | 29 | 28 | −0.2 µg/m³−4% |
| 304 | Steamboat SpringsColorado, United States | 29 | 28 | −0.2 µg/m³−4% |
| 305 | PortsmouthNew Hampshire, United States | 33 | 32 | −0.2 µg/m³−3% |
| 306 | North OgdenUtah, United States | 33 | 32 | −0.2 µg/m³−3% |
| 307 | FrostburgMaryland, United States | 35 | 34 | −0.2 µg/m³−3% |
| 308 | White CenterWashington, United States | 38 | 37 | −0.2 µg/m³−3% |
| 309 | RosevilleCalifornia, United States | 40 | 39 | −0.2 µg/m³−3% |
| 310 | LebanonOhio, United States | 41 | 40 | −0.2 µg/m³−3% |
| 311 | University CityMissouri, United States | 41 | 40 | −0.2 µg/m³−3% |
| 312 | TampaFlorida, United States | 41 | 40 | −0.2 µg/m³−3% |
| 313 | AltoonaPennsylvania, United States | 42 | 41 | −0.2 µg/m³−3% |
| 314 | DanburyConnecticut, United States | 42 | 41 | −0.2 µg/m³−3% |
| 315 | Fort LauderdaleFlorida, United States | 42 | 41 | −0.2 µg/m³−3% |
| 316 | KahuluiHawaii, United States | 23 | 22 | −0.2 µg/m³−5% |
| 317 | AugustaMaine, United States | 34 | 33 | −0.2 µg/m³−3% |
| 318 | LowellMassachusetts, United States | 34 | 33 | −0.2 µg/m³−3% |
| 319 | New BrunswickNew Jersey, United States | 39 | 38 | −0.2 µg/m³−3% |
| 320 | MuncieIndiana, United States | 47 | 46 | −0.2 µg/m³−2% |
| 321 | College StationTexas, United States | 47 | 46 | −0.2 µg/m³−2% |
| 322 | TopekaKansas, United States | 50 | 49 | −0.2 µg/m³−2% |
| 323 | Long BeachCalifornia, United States | 52 | 52 | −0.2 µg/m³−2% |
| 324 | ChicagoIllinois, United States | 53 | 52 | −0.2 µg/m³−2% |
| 325 | MiddletownOhio, United States | 54 | 54 | −0.2 µg/m³−2% |
| 326 | DublinOhio, United States | 46 | 46 | −0.1 µg/m³−1% |
| 327 | ChanuteKansas, United States | 49 | 48 | −0.1 µg/m³−1% |
| 328 | Port TownsendWashington, United States | 23 | 23 | −0.1 µg/m³−2% |
| 329 | LewistonMaine, United States | 32 | 31 | −0.1 µg/m³−2% |
| 330 | Oxon Hill-GlassmanorMaryland, United States | 37 | 37 | −0.1 µg/m³−1% |
| 331 | BountifulUtah, United States | 37 | 37 | −0.1 µg/m³−1% |
| 332 | Rapid CitySouth Dakota, United States | 37 | 37 | −0.1 µg/m³−1% |
| 333 | Delray BeachFlorida, United States | 37 | 37 | −0.1 µg/m³−1% |
| 334 | South VinelandNew Jersey, United States | 40 | 39 | −0.1 µg/m³−1% |
| 335 | Lexington-FayetteKentucky, United States | 40 | 39 | −0.1 µg/m³−1% |
| 336 | EdgewoodMaryland, United States | 41 | 41 | −0.1 µg/m³−1% |
| 337 | WavelandMississippi, United States | 44 | 43 | −0.1 µg/m³−1% |
| 338 | BellevueWashington, United States | 21 | 20 | −0.1 µg/m³−3% |
| 339 | Boulder CityNevada, United States | 22 | 21 | −0.1 µg/m³−3% |
| 340 | LaramieWyoming, United States | 18 | 18 | −0.1 µg/m³−3% |
| 341 | West GreenwichRhode Island, United States | 21 | 21 | −0.1 µg/m³−3% |
| 342 | AberdeenWashington, United States | 21 | 21 | −0.1 µg/m³−3% |
| 343 | CoventryRhode Island, United States | 21 | 21 | −0.1 µg/m³−3% |
| 344 | FlorenceOregon, United States | 23 | 22 | −0.1 µg/m³−2% |
| 345 | LongviewWashington, United States | 26 | 25 | −0.1 µg/m³−2% |
| 346 | MilwaukieOregon, United States | 26 | 25 | −0.1 µg/m³−2% |
| 347 | AspenColorado, United States | 27 | 26 | −0.1 µg/m³−2% |
| 348 | TalentOregon, United States | 28 | 27 | −0.1 µg/m³−2% |
| 349 | PuebloColorado, United States | 29 | 29 | −0.1 µg/m³−2% |
| 350 | ParklandWashington, United States | 31 | 30 | −0.1 µg/m³−2% |
| 351 | LondonderryNew Hampshire, United States | 31 | 31 | −0.1 µg/m³−2% |
| 352 | DerryNew Hampshire, United States | 31 | 31 | −0.1 µg/m³−2% |
| 353 | GlendiveMontana, United States | 32 | 32 | −0.1 µg/m³−2% |
| 354 | QuincyMassachusetts, United States | 32 | 32 | −0.1 µg/m³−2% |
| 355 | HerrimanUtah, United States | 34 | 33 | −0.1 µg/m³−2% |
| 356 | ElktonMaryland, United States | 37 | 36 | −0.1 µg/m³−2% |
| 357 | GlasgowDelaware, United States | 37 | 36 | −0.1 µg/m³−2% |
| 358 | ElizabethtownKentucky, United States | 39 | 38 | −0.1 µg/m³−1% |
| 359 | BrunswickGeorgia, United States | 42 | 42 | −0.1 µg/m³−1% |
| 360 | JeffersontownKentucky, United States | 43 | 43 | −0.1 µg/m³−1% |
| 361 | Ferry PassFlorida, United States | 44 | 44 | −0.1 µg/m³−1% |
| 362 | PrichardAlabama, United States | 44 | 44 | −0.1 µg/m³−1% |
| 363 | San JoseCalifornia, United States | 46 | 45 | −0.1 µg/m³−1% |
| 364 | SaginawTexas, United States | 47 | 46 | −0.1 µg/m³−1% |
| 365 | River OaksTexas, United States | 47 | 46 | −0.1 µg/m³−1% |
| 366 | WarrenvilleIllinois, United States | 49 | 49 | −0.1 µg/m³−1% |
| 367 | South BendIndiana, United States | 49 | 49 | −0.1 µg/m³−1% |
| 368 | AppletonWisconsin, United States | 50 | 49 | −0.1 µg/m³−1% |
| 369 | DaytonOhio, United States | 50 | 49 | −0.1 µg/m³−1% |
| 370 | Wood RiverIllinois, United States | 51 | 50 | −0.1 µg/m³−1% |
| 371 | Lake CityFlorida, United States | 52 | 51 | −0.1 µg/m³−1% |
| 372 | HelotesTexas, United States | 52 | 52 | −0.1 µg/m³−1% |
| 373 | NorwoodOhio, United States | 52 | 52 | −0.1 µg/m³−1% |
| 374 | PortervilleCalifornia, United States | 53 | 52 | −0.1 µg/m³−1% |
Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.