SmogRank / History / July 17, 2026

Most polluted cities on July 17, 2026

2,326 cities ranked by their average PM2.5 over the day. Each city's own local calendar day.

← July 16, 2026July 18, 2026 →
#City µg/m³× WHO
1Perrysburg Ohio, United States
254.016.9×
2St. Thomas Ontario, Canada
247.016.5×
3Superior Wisconsin, United States
246.016.4×
4Steubenville Ohio, United States
236.015.7×
5Medina Ohio, United States
229.015.3×
6Royal Oak low-cost sensors Michigan, United States
225.515.0×
7Lansing Michigan, United States
223.014.9×
8Grand Rapids Michigan, United States
220.014.7×
9Ypsilanti Michigan, United States
216.014.4×
9Duluth Minnesota, United States
216.014.4×
11Bay City Michigan, United States
212.014.1×
11Jenison Michigan, United States
212.014.1×
11Southfield Michigan, United States
212.014.1×
11Toledo Ohio, United States
212.014.1×
15London Ontario, Canada
210.014.0×
15Windsor Ontario, Canada
210.014.0×
17Oregon Ohio, United States
207.013.8×
18Dearborn Michigan, United States
206.013.7×
19Canton Ohio, United States
203.513.6×
20Lincoln Park Michigan, United States
203.013.5×
21Westerville Ohio, United States
202.013.5×
22Detroit Michigan, United States
199.013.3×
23Weirton West Virginia, United States
197.513.2×
24Taylor Michigan, United States
197.013.1×
25Sarnia Ontario, Canada
196.013.1×
26Kalamazoo Michigan, United States
189.012.6×
26Port Huron Michigan, United States
189.012.6×
28York Pennsylvania, United States
185.012.3×
29Columbus Ohio, United States
183.512.2×
30Eastpointe Michigan, United States
183.012.2×
31Erie Pennsylvania, United States
181.012.1×
32Brantford Ontario, Canada
178.011.9×
33Pittsburgh Pennsylvania, United States
176.511.8×
34Cleveland Ohio, United States
175.511.7×
35Fort Wayne Indiana, United States
173.011.5×
36Ashburn Virginia, United States
172.011.5×
37Chambersburg Pennsylvania, United States
171.011.4×
38Wyoming Michigan, United States
168.011.2×
38Kitchener Ontario, Canada
168.011.2×
40Shaker Heights Ohio, United States
167.511.2×
41Marquette Michigan, United States
167.011.1×
41Upper Saint Clair Pennsylvania, United States
167.011.1×
43West Mifflin Pennsylvania, United States
166.511.1×
44Chatham Ontario, Canada
166.011.1×
45Akron Ohio, United States
163.010.9×
46Naperville Illinois, United States
162.010.8×
46Elkhart Indiana, United States
162.010.8×
46Dublin Ohio, United States
162.010.8×
49South Bend Indiana, United States
161.010.7×
49Flint Michigan, United States
161.010.7×
49Wilkinsburg Pennsylvania, United States
161.010.7×
49Weirton Heights West Virginia, United States
161.010.7×
53Springfield Virginia, United States
160.010.7×
53Redford Michigan, United States
160.010.7×
53Warren Ohio, United States
160.010.7×
53Johnstown Pennsylvania, United States
160.010.7×
53Guelph Ontario, Canada
160.010.7×
58Northbrook Illinois, United States
157.010.5×
58Holland Michigan, United States
157.010.5×
58Green Bay Wisconsin, United States
157.010.5×
61Cleveland Heights Ohio, United States
155.010.3×
61Carlisle Pennsylvania, United States
155.010.3×
61McKeesport Pennsylvania, United States
155.010.3×
64Harrisburg Pennsylvania, United States
153.010.2×
65Michigan City Indiana, United States
150.010.0×
66Hagerstown Maryland, United States
149.09.9×
66Rockford Illinois, United States
149.09.9×
68Aurora Illinois, United States
148.09.9×
69Lima Ohio, United States
147.09.8×
70Lancaster Pennsylvania, United States
146.09.7×
70Appleton Wisconsin, United States
146.09.7×
72Evanston low-cost sensors Illinois, United States
145.59.7×
73Rose Hill Virginia, United States
145.09.7×
74Philadelphia Pennsylvania, United States
144.09.6×
74Gahanna Ohio, United States
144.09.6×
76Springfield Ohio, United States
143.09.5×
77Elgin Illinois, United States
142.09.5×
77Lebanon Pennsylvania, United States
142.09.5×
77Hamilton Ontario, Canada
142.09.5×
80Hermitage Pennsylvania, United States
141.09.4×
81Youngstown Ohio, United States
138.09.2×
82Oak Lawn Illinois, United States
136.09.1×
82Waukesha Wisconsin, United States
136.09.1×
84Wilmington Delaware, United States
135.59.0×
85Dover Delaware, United States
135.09.0×
86Franklin Park Illinois, United States
132.08.8×
86Portage Indiana, United States
132.08.8×
86Brookfield low-cost sensors Wisconsin, United States
132.08.8×
89Newark Delaware, United States
130.58.7×
90Joliet Illinois, United States
130.08.7×
91Wheaton low-cost sensors Illinois, United States
129.58.6×
92Elmwood Park Illinois, United States
128.08.5×
92Abington low-cost sensors Pennsylvania, United States
128.08.5×
92South Milwaukee Wisconsin, United States
128.08.5×
95Zion Illinois, United States
127.08.5×
95Altoona Pennsylvania, United States
127.08.5×
95Norristown Pennsylvania, United States
127.08.5×
98Bear Delaware, United States
126.08.4×
98Chester Pennsylvania, United States
126.08.4×
100Milton Ontario, Canada
124.08.3×
101Elkton Maryland, United States
123.08.2×
101South Laurel Maryland, United States
123.08.2×
101State College Pennsylvania, United States
123.08.2×
101Spokane Valley Washington, United States
123.08.2×
105Bridgeview Illinois, United States
122.08.1×
106Oconomowoc low-cost sensors Wisconsin, United States
121.08.1×
107Pennsauken New Jersey, United States
120.58.0×
108Des Plaines Illinois, United States
119.07.9×
109Baltimore Maryland, United States
118.07.9×
109Dolton Illinois, United States
118.07.9×
111Ropar Punjab, India
117.07.8×
111Hunt Valley Maryland, United States
117.07.8×
113Camden low-cost sensors New Jersey, United States
116.57.8×
114Edgewood Maryland, United States
116.07.7×
114Brookfield Illinois, United States
116.07.7×
116Scaggsville Maryland, United States
114.07.6×
117Sonīpat Haryana, India
113.07.5×
117Rockville Maryland, United States
113.07.5×
117Gary Indiana, United States
113.07.5×
120Chicago Illinois, United States
111.07.4×
121Calumet City Illinois, United States
110.07.3×
121Cary Illinois, United States
110.07.3×
121East Chicago Indiana, United States
110.07.3×
121Middleton low-cost sensors Wisconsin, United States
110.07.3×
125Mérida Yucatán, Mexico
109.07.3×
125Hammond Indiana, United States
109.07.3×
125Waterdown Ontario, Canada
109.07.3×
128Washington District of Columbia, United States
107.57.2×
129St. Catharines Ontario, Canada
107.07.1×
130Short Pump Virginia, United States
106.07.1×
130Oxon Hill-Glassmanor Maryland, United States
106.07.1×
132Oakville Ontario, Canada
105.07.0×
133Bensalem Pennsylvania, United States
104.06.9×
134Yellowknife low-cost sensors Northwest Territories, Canada
103.56.9×
135Reading Pennsylvania, United States
103.06.9×
135Madison Wisconsin, United States
103.06.9×
137Gurugram Haryana, India
101.06.7×
137Charlottesville Virginia, United States
101.06.7×
137Brampton Ontario, Canada
101.06.7×
140Dayton Ohio, United States
100.06.7×
141Richmond Virginia, United States
99.56.6×
142Spokane Washington, United States
98.16.5×
143Guwahati Assam, India
97.96.5×
144Bahadurgarh Haryana, India
97.86.5×
144Coeur d'Alene Idaho, United States
97.86.5×
146Kaithal Haryana, India
95.16.3×
147Faridabad Haryana, India
93.96.3×
148Kinshasa low-cost sensors Kinshasa, Democratic Republic of the Congo
91.16.1×
149Hopewell Virginia, United States
91.06.1×
150Sewell New Jersey, United States
90.16.0×
151Atlantic City New Jersey, United States
84.75.6×
152Dera Māndi Delhi, India
83.25.5×
153Mississauga Ontario, Canada
81.35.4×
154Rājgīr Bihar, India
81.25.4×
155Pleasantville New Jersey, United States
80.65.4×
156Kampala low-cost sensors Central Region, Uganda
79.95.3×
157Buffalo New York, United States
79.75.3×
158Jīnd Haryana, India
78.75.2×
159Alliston Ontario, Canada
76.05.1×
160Painesville Ohio, United States
75.65.0×
161Newmarket Ontario, Canada
75.35.0×
162Bethlehem Pennsylvania, United States
75.15.0×
163Ewing New Jersey, United States
73.94.9×
164Allentown Pennsylvania, United States
72.04.8×
165Lilongwe low-cost sensors Central Region, Malawi
71.84.8×
166Gummidipundi Tamil Nadu, India
69.24.6×
167East Hampton Virginia, United States
68.84.6×
168Beitbridge low-cost sensors Matabeleland South Province, Zimbabwe
68.74.6×
169Bhiwāni Haryana, India
68.54.6×
170Barrie Ontario, Canada
68.34.6×
171Dādri Uttar Pradesh, India
67.54.5×
171Ashland Oregon, United States
67.54.5×
173Sault Ste. Marie Ontario, Canada
66.64.4×
174Thānesar Haryana, India
66.54.4×
175Sasarām Bihar, India
64.74.3×
176Trenton New Jersey, United States
64.54.3×
177Karonga low-cost sensors Northern Region, Malawi
63.54.2×
178Toms River New Jersey, United States
63.34.2×
179Vereeniging low-cost sensors Gauteng, South Africa
62.74.2×
179Nilópolis Rio de Janeiro, Brazil
62.74.2×
181Meerut Uttar Pradesh, India
62.64.2×
182South Vineland New Jersey, United States
62.34.2×
183Karnāl Haryana, India
61.94.1×
184Chesapeake Virginia, United States
59.13.9×
185New Brunswick New Jersey, United States
58.83.9×
186Redmond low-cost sensors Washington, United States
58.73.9×
187Muzaffarnagar Uttar Pradesh, India
58.33.9×
188Altamont Oregon, United States
58.23.9×
189Roanoke Rapids North Carolina, United States
58.03.9×
190Bhiwadi Rajasthan, India
57.53.8×
191Ambāla Haryana, India
56.43.8×
191Noida Uttar Pradesh, India
56.43.8×
193Toronto Ontario, Canada
55.43.7×
194Tongaat low-cost sensors KwaZulu-Natal, South Africa
54.83.7×
194Roanoke Virginia, United States
54.83.7×
196Delhi Delhi, India
53.63.6×
197Lahore low-cost sensors Punjab, Pakistan
53.03.5×
198Chāpra Bihar, India
51.73.4×
199Sirsa Haryana, India
51.03.4×
199Ghāziābād Uttar Pradesh, India
51.03.4×

Top 200 of 2,326 shown.

Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data