SmogRank / Countries / Japan / 2026
Most polluted cities in Japan, 2026
530 cities in Japan ranked by their average PM2.5 so far (273 of 365 days); 530 above the WHO annual guideline (5.0 µg/m³). Worst: Onomichi at 13.4 µg/m³, #377 of 2,181 cities in the world. Cleanest: Kushiro at 5.6. A city needs measurements on 70% of the days to be ranked.
- 1OnomichiHiroshima 13.42.7×
- 2HitaOita 13.02.6×
- 3FukuyamaHiroshima 12.42.5×
- 4Shin’ichiHiroshima 12.22.4×
- 5SaijōEhime 11.72.3×
- 6ChikugoFukuoka 11.52.3×
- 7NiihamaEhime 11.32.3×
- 8KurashikiOkayama 11.12.2×
- 9OnodaYamaguchi 11.02.2×
- 9BizenOkayama 11.02.2×
- 11Tanushimarumachi-toyokiFukuoka 10.92.2×
- 11Maebaru-chūōFukuoka 10.92.2×
- 11Kan’onjichōKagawa 10.92.2×
- 11TsuchiuraIbaraki 10.92.2×
- 11ShikokuchūōEhime 10.92.2×
- 16ŌmutaFukuoka 10.82.2×
- 16OwariasahiAichi 10.82.2×
- 18TamanoOkayama 10.72.1×
- 19TakamatsuKagawa 10.62.1×
- 19FukuokaFukuoka 10.62.1×
- 19HyūgaMiyazaki 10.62.1×
- 19HigashihiroshimaHiroshima 10.62.1×
- 23Tottori-shiTottori 10.52.1×
- 23Kakogawachō-honmachiHyōgo 10.52.1×
- 23ImabariEhime 10.52.1×
- 26TakanabeMiyazaki 10.42.1×
- 26KasaokaOkayama 10.42.1×
- 28ShidoKagawa 10.32.1×
- 28HigashinozoeHyōgo 10.32.1×
- 28Hondomachi-hondoKumamoto 10.32.1×
- 28HigashiosakaOsaka 10.32.1×
- 28KamisuIbaraki 10.32.1×
- 28KogaFukuoka 10.32.1×
- 28AsakuchiOkayama 10.32.1×
- 35TaharaAichi 10.22.0×
- 35SaseboNagasaki 10.22.0×
- 35KitakyushuFukuoka 10.22.0×
- 35BeppuOita 10.22.0×
- 35IshinomakiMiyagi 10.22.0×
- 35AraoKumamoto 10.22.0×
- 41Uekimachi-mōnoKumamoto 10.12.0×
- 41SōjaOkayama 10.12.0×
- 41MinatoWakayama 10.12.0×
- 41MiyakonojōMiyazaki 10.12.0×
- 41MarugameKagawa 10.12.0×
- 41KureHiroshima 10.12.0×
- 41AmagasakiHyōgo 10.12.0×
- 41HigashigōSaga 10.12.0×
- 49TenriNara 10.02.0×
- 49Shimo-tsumaIbaraki 10.02.0×
- 49NyūzenToyama 10.02.0×
- 52ZentsujichóKagawa 9.92.0×
- 52Ōyanomachi-noboritateKumamoto 9.92.0×
- 52NobeokaMiyazaki 9.92.0×
- 52ItoigawaNiigata 9.92.0×
- 52MatsuyamaEhime 9.92.0×
- 57YawataKyoto 9.82.0×
- 57ToyamaToyama 9.82.0×
- 57TamanaKumamoto 9.82.0×
- 57SusakiKochi 9.82.0×
- 57ShimonosekiYamaguchi 9.82.0×
- 57ŌzuKumamoto 9.82.0×
- 57ŌtakeHiroshima 9.82.0×
- 57KariyaAichi 9.82.0×
- 57KandaFukuoka 9.82.0×
- 57IwadeWakayama 9.82.0×
- 57Imarichō-kōSaga 9.82.0×
- 57Fukui-shiFukui 9.82.0×
- 57KaniGifu 9.82.0×
- 57KotōKumamoto 9.82.0×
- 71TokonameAichi 9.71.9×
- 71TagawaFukuoka 9.71.9×
- 71SumotoHyōgo 9.71.9×
- 71OsakaOsaka 9.71.9×
- 71NishiwakiHyōgo 9.71.9×
- 71KurayoshiTottori 9.71.9×
- 71KumamotoKumamoto 9.71.9×
- 71IkedachōTokushima 9.71.9×
- 71IizukaFukuoka 9.71.9×
- 71HōryūjiNara 9.71.9×
- 71HiroshimaHiroshima 9.71.9×
- 71MinawaKanagawa 9.71.9×
- 71NagaiYamagata 9.71.9×
- 84AkashiHyōgo 9.61.9×
- 84YokkaichiMie 9.61.9×
- 84TokiGifu 9.61.9×
- 84TakahashiOkayama 9.61.9×
- 84SagaSaga 9.61.9×
- 84OnoHyōgo 9.61.9×
- 84MiharaHiroshima 9.61.9×
- 84KishiwadaOsaka 9.61.9×
- 84KikuchiKumamoto 9.61.9×
- 84HimimachiToyama 9.61.9×
- 84HekinanAichi 9.61.9×
- 84GyōdaSaitama 9.61.9×
- 84AnanTokushima 9.61.9×
- 84KariyaHyōgo 9.61.9×
- 84ImizuToyama 9.61.9×
- 84JōetsuNiigata 9.61.9×
- 84MatsusakaMie 9.61.9×
- 101TsuyamaOkayama 9.51.9×
- 101Narutochō-mitsuishiTokushima 9.51.9×
- 101KashimaSaga 9.51.9×
- 101Kanzakimachi-kanzakiSaga 9.51.9×
- 101AioiHyōgo 9.51.9×
- 101TakuSaga 9.51.9×
- 101NantanKyoto 9.51.9×
- 108HonmachiKumamoto 9.41.9×
- 108UtoKumamoto 9.41.9×
- 108UbeYamaguchi 9.41.9×
- 108TomiokaGunma 9.41.9×
- 108TogitsuNagasaki 9.41.9×
- 108TakeharaHiroshima 9.41.9×
- 108TakaokaToyama 9.41.9×
- 108SakaiOsaka 9.41.9×
- 108OkayamaOkayama 9.41.9×
- 108NōgataFukuoka 9.41.9×
- 108MinamirinkanKanagawa 9.41.9×
- 108KyotoKyoto 9.41.9×
- 108KashiwaraNara 9.41.9×
- 108KainanWakayama 9.41.9×
- 108IwakuniYamaguchi 9.41.9×
- 108HagiYamaguchi 9.41.9×
- 108HachiōjiTokyo 9.41.9×
- 108AsakaSaitama 9.41.9×
- 108OgōriFukuoka 9.41.9×
- 127TakeoSaga 9.31.9×
- 127SekimachiGifu 9.31.9×
- 127SandachōHyōgo 9.31.9×
- 127ŌitaOita 9.31.9×
- 127NishinomiyaHyōgo 9.31.9×
- 127MifuneKumamoto 9.31.9×
- 127KōtariKyoto 9.31.9×
- 127KogaFukuoka 9.31.9×
- 127TakashimaShiga 9.31.9×
- 127TsushimaNagasaki 9.31.9×
- 127UkihaFukuoka 9.31.9×
- 127ItoshimaFukuoka 9.31.9×
- 127TōkaiAichi 9.31.9×
- 140YukuhashiFukuoka 9.21.8×
- 140TsurusakiOita 9.21.8×
- 140SuzukaMie 9.21.8×
- 140ShibataNiigata 9.21.8×
- 140OyamaTochigi 9.21.8×
- 140NishioAichi 9.21.8×
- 140Kashima-shiIbaraki 9.21.8×
- 140FukuroiShizuoka 9.21.8×
- 140FukuchiyamaKyoto 9.21.8×
- 140IyoEhime 9.21.8×
- 140NakaIbaraki 9.21.8×
- 140HiragiKagawa 9.21.8×
- 140ShūnanYamaguchi 9.21.8×
- 153OkazakiAichi 9.11.8×
- 153NagahamaShiga 9.11.8×
- 153MinamataKumamoto 9.11.8×
- 153InuyamaAichi 9.11.8×
- 153IkarugaHyōgo 9.11.8×
- 153HikariYamaguchi 9.11.8×
- 153NagatoYamaguchi 9.11.8×
- 153ChikuseiIbaraki 9.11.8×
- 153MatsuuraNagasaki 9.11.8×
- 153WakasugiFukuoka 9.11.8×
- 153MimaTokushima 9.11.8×
- 164YoukaichiShiga 9.01.8×
- 164TatebayashiGunma 9.01.8×
- 164ShibukawaGunma 9.01.8×
- 164NichinanMiyazaki 9.01.8×
- 164MenumaSaitama 9.01.8×
- 164KochiKochi 9.01.8×
- 164KobayashiMiyazaki 9.01.8×
- 164KanoyaKagoshima 9.01.8×
- 164KagoshimaKagoshima 9.01.8×
- 164IzumisanoOsaka 9.01.8×
- 164HimejiHyōgo 9.01.8×
- 164HashimotoWakayama 9.01.8×
- 164AyabeKyoto 9.01.8×
- 164ShiroishiMiyagi 9.01.8×
- 164NiizaSaitama 9.01.8×
- 164InabeMie 9.01.8×
- 164TatsunoHyōgo 9.01.8×
- 181ToyookaHyōgo 8.91.8×
- 181SakadoSaitama 8.91.8×
- 181NakamaFukuoka 8.91.8×
- 181NagoyaAichi 8.91.8×
- 181KukichūōSaitama 8.91.8×
- 181KofuYamanashi 8.91.8×
- 181KameokaKyoto 8.91.8×
- 181IgusaSaitama 8.91.8×
- 181HijiOita 8.91.8×
- 181GionHiroshima 8.91.8×
- 181AgeoSaitama 8.91.8×
- 181SagaeYamagata 8.91.8×
- 181Misato, SaitamaSaitama 8.91.8×
- 181HashimaGifu 8.91.8×
- 181MunakataFukuoka 8.91.8×
- 196ShingūWakayama 8.81.8×
- 196YamaguchiYamaguchi 8.81.8×
- 196TosuSaga 8.81.8×
- 196TanabeWakayama 8.81.8×
- 196TakayamaGifu 8.81.8×
- 196SōkaSaitama 8.81.8×
- 196SaikūMie 8.81.8×
- 196NakatsuOita 8.81.8×
- 196KobeHyōgo 8.81.8×
- 196KiryūGunma 8.81.8×
- 196KaratsuSaga 8.81.8×
- 196KakamigaharaGifu 8.81.8×
- 196HanyūSaitama 8.81.8×
- 196HandaAichi 8.81.8×
- 196ChigasakiKanagawa 8.81.8×
- 196AshikagaTochigi 8.81.8×
- 196AiharaKanagawa 8.81.8×
- 196JōsōIbaraki 8.81.8×
- 196KinokawaWakayama 8.81.8×
- 196AyaseKanagawa 8.81.8×
- 216YoriiSaitama 8.71.7×
- 216YokotaTokyo 8.71.7×
- 216YaeHiroshima 8.71.7×
- 216UozuToyama 8.71.7×
- 216UjiKyoto 8.71.7×
- 216Ueno-ebisumachiMie 8.71.7×
- 216TsuruokaYamagata 8.71.7×
- 216TsubataIshikawa 8.71.7×
- 216TokyoTokyo 8.71.7×
- 216TakatsukiOsaka 8.71.7×
- 216TakarazukaHyōgo 8.71.7×
- 216SanoTochigi 8.71.7×
- 216ŌtaGunma 8.71.7×
- 216ŌmuraNagasaki 8.71.7×
- 216NabariMie 8.71.7×
- 216MorohongōSaitama 8.71.7×
- 216MiyazakiMiyazaki 8.71.7×
- 216MieOita 8.71.7×
- 216KudamatsuYamaguchi 8.71.7×
- 216Kodamachō-kodamaminamiSaitama 8.71.7×
- 216KazoSaitama 8.71.7×
- 216KawaguchiSaitama 8.71.7×
- 216Kashihara-shiNara 8.71.7×
- 216KameyamaMie 8.71.7×
- 216IzumoShimane 8.71.7×
- 216IseMie 8.71.7×
- 216HikoneShiga 8.71.7×
- 216IwanumaMiyagi 8.71.7×
- 216HigashineYamagata 8.71.7×
- 216ShintomiMiyazaki 8.71.7×
- 216KasugaFukuoka 8.71.7×
- 216Higashi-MatsuyamaSaitama 8.71.7×
- 216BuzenFukuoka 8.71.7×
- 216SugaiKyoto 8.71.7×
- 216KuwanaMie 8.71.7×
- 216MizuhoGifu 8.71.7×
- 216GotōNagasaki 8.71.7×
- 216FuefukiYamanashi 8.71.7×
- 254YaoOsaka 8.61.7×
- 254KusatsuShiga 8.61.7×
- 254KoshigayaSaitama 8.61.7×
- 254KōnosuSaitama 8.61.7×
- 254IzumiOsaka 8.61.7×
- 254HitoyoshiKumamoto 8.61.7×
- 254Natori-shiMiyagi 8.61.7×
- 254IwakiFukushima 8.61.7×
- 254HokotaIbaraki 8.61.7×
- 254IrumaSaitama 8.61.7×
- 254KirishimaKagoshima 8.61.7×
- 254MineYamaguchi 8.61.7×
- 254JōyōKyoto 8.61.7×
- 267YonagoTottori 8.51.7×
- 267TsukumiuraOita 8.51.7×
- 267Sakai-nakajimaGunma 8.51.7×
- 267NodaChiba 8.51.7×
- 267NakamuraKochi 8.51.7×
- 267MikuniFukui 8.51.7×
- 267MatsutōIshikawa 8.51.7×
- 267MaizuruKyoto 8.51.7×
- 267Kamojimachō-jōgejimaTokushima 8.51.7×
- 267IzumiKagoshima 8.51.7×
- 267HirakataOsaka 8.51.7×
- 267GifuGifu 8.51.7×
- 267GamagōriAichi 8.51.7×
- 267MinokamoGifu 8.51.7×
- 267HabikinoOsaka 8.51.7×
- 267MinamichitaAichi 8.51.7×
- 267KodairaTokyo 8.51.7×
- 284AtsugiKanagawa 8.41.7×
- 284YokohamaKanagawa 8.41.7×
- 284Ureshinomachi-shimojukuSaga 8.41.7×
- 284TsuMie 8.41.7×
- 284SendaiKagoshima 8.41.7×
- 284MiyoshiHiroshima 8.41.7×
- 284KushikinoKagoshima 8.41.7×
- 284IwataShizuoka 8.41.7×
- 284IkomaNara 8.41.7×
- 284IchinomiyaAichi 8.41.7×
- 284HōfuYamaguchi 8.41.7×
- 284HannōSaitama 8.41.7×
- 284FujiShizuoka 8.41.7×
- 284ChiryūAichi 8.41.7×
- 284AkiKochi 8.41.7×
- 284YonezawaYamagata 8.41.7×
- 284MoriokaIwate 8.41.7×
- 284ChitoseHokkaido 8.41.7×
- 284TonamiToyama 8.41.7×
- 284KosaiShizuoka 8.41.7×
- 284Kawachi-NaganoOsaka 8.41.7×
- 284SaitamaSaitama 8.41.7×
- 284YawatahamaEhime 8.41.7×
- 284ShonaiYamagata 8.41.7×
- 284IgaMie 8.41.7×
- 284AmaAichi 8.41.7×
- 310YasugichōShimane 8.31.7×
- 310UtsunomiyaTochigi 8.31.7×
- 310TokushimaTokushima 8.31.7×
- 310TobaMie 8.31.7×
- 310TakinomiyaKagawa 8.31.7×
- 310SaikiOita 8.31.7×
- 310Nara-shiNara 8.31.7×
- 310MiyazuKyoto 8.31.7×
- 310KurihamaKanagawa 8.31.7×
- 310KumagayaSaitama 8.31.7×
- 310KaminokawaTochigi 8.31.7×
- 310IsahayaNagasaki 8.31.7×
- 310HonjōSaitama 8.31.7×
- 310GobōWakayama 8.31.7×
- 310YoshiokaMiyagi 8.31.7×
- 310SakuraChiba 8.31.7×
- 310MiyakoIwate 8.31.7×
- 310ChibaChiba 8.31.7×
- 310HirosakiAomori 8.31.7×
- 310AzaminoKanagawa 8.31.7×
- 310YameFukuoka 8.31.7×
- 310KizugawaKyoto 8.31.7×
- 310MinamikyushuKagoshima 8.31.7×
- 310YoshinogawaTokushima 8.31.7×
- 310UnnanShimane 8.31.7×
- 335YanaiYamaguchi 8.21.6×
- 335ToyonakaOsaka 8.21.6×
- 335ToyohashiAichi 8.21.6×
- 335TondabayashichōOsaka 8.21.6×
- 335ObitaNagasaki 8.21.6×
- 335NumazuShizuoka 8.21.6×
- 335NagasakiNagasaki 8.21.6×
- 335MasudaShimane 8.21.6×
- 335KasukabeSaitama 8.21.6×
- 335KashiwaChiba 8.21.6×
- 335InoKochi 8.21.6×
- 335HakuiIshikawa 8.21.6×
- 335KimitsuChiba 8.21.6×
- 335HachinoheAomori 8.21.6×
- 335KagaIshikawa 8.21.6×
- 335SennanOsaka 8.21.6×
- 335YamatoKanagawa 8.21.6×
- 335HigashikurumeTokyo 8.21.6×
- 335FuchūTokyo 8.21.6×
- 354TokorozawaSaitama 8.11.6×
- 354TajimiGifu 8.11.6×
- 354SuzakaNagano 8.11.6×
- 354SabaeFukui 8.11.6×
- 354OdawaraKanagawa 8.11.6×
- 354Ōdachō-ōdaShimane 8.11.6×
- 354ObamaFukui 8.11.6×
- 354MachidaTokyo 8.11.6×
- 354KomatsuIshikawa 8.11.6×
- 354KitahamaShiga 8.11.6×
- 354KawagoeSaitama 8.11.6×
- 354IseharaKanagawa 8.11.6×
- 354HadanoKanagawa 8.11.6×
- 354ChichibuSaitama 8.11.6×
- 354ShinjōYamagata 8.11.6×
- 354KakudaMiyagi 8.11.6×
- 354IchiharaChiba 8.11.6×
- 354MuroranHokkaido 8.11.6×
- 354BandōIbaraki 8.11.6×
- 354InashikiIbaraki 8.11.6×
- 354SōmaFukushima 8.11.6×
- 354KamagayaChiba 8.11.6×
- 376YanagawaFukuoka 8.01.6×
- 376YaitaTochigi 8.01.6×
- 376ToyotaAichi 8.01.6×
- 376ShimaMie 8.01.6×
- 376SetoAichi 8.01.6×
- 376ŌtsuShiga 8.01.6×
- 376NagaokaNiigata 8.01.6×
- 376KamakuraKanagawa 8.01.6×
- 376GōtsuchōShimane 8.01.6×
- 376GotembaShizuoka 8.01.6×
- 376SayamaSaitama 8.01.6×
- 376MookaTochigi 8.01.6×
- 376AomoriAomori 8.01.6×
- 376YachiyoChiba 8.01.6×
- 376HigashimatsushimaMiyagi 8.01.6×
- 376SadoNiigata 8.01.6×
- 392NanaoIshikawa 7.91.6×
- 392KanumaTochigi 7.91.6×
- 392HiratsukaKanagawa 7.91.6×
- 392ŌmihachimanShiga 7.91.6×
- 392FujisawaKanagawa 7.91.6×
- 392AnjōAichi 7.91.6×
- 392YotsukaidōChiba 7.91.6×
- 392Tagajō-shiMiyagi 7.91.6×
- 392KumanoMie 7.91.6×
- 392SayamaOsaka 7.91.6×
- 392NoboritoKanagawa 7.91.6×
- 392IkiNagasaki 7.91.6×
- 404UrayasuChiba 7.81.6×
- 404TochigiTochigi 7.81.6×
- 404ŌtsukiYamanashi 7.81.6×
- 404ŌmeTokyo 7.81.6×
- 404NiigataNiigata 7.81.6×
- 404MatsueShimane 7.81.6×
- 404Kaseda-shirakameKagoshima 7.81.6×
- 404Kameda-honchōNiigata 7.81.6×
- 404HamadaShimane 7.81.6×
- 404YachimataChiba 7.81.6×
- 404TorideIbaraki 7.81.6×
- 404KesennumaMiyagi 7.81.6×
- 404AsoKumamoto 7.81.6×
- 404ŌsakiMiyagi 7.81.6×
- 404NisshinAichi 7.81.6×
- 404MotosuGifu 7.81.6×
- 404Minami-AlpsYamanashi 7.81.6×
- 404KyōtangoKyoto 7.81.6×
- 404SaikaiNagasaki 7.81.6×
- 423TsurugaFukui 7.71.5×
- 423ShizuokaShizuoka 7.71.5×
- 423ShinshiroAichi 7.71.5×
- 423NakanojōGunma 7.71.5×
- 423NaganoNagano 7.71.5×
- 423KisarazuChiba 7.71.5×
- 423KanazawaIshikawa 7.71.5×
- 423KakegawaShizuoka 7.71.5×
- 423AtamiShizuoka 7.71.5×
- 423KikugawaShizuoka 7.71.5×
- 423SusonoShizuoka 7.71.5×
- 423NankokuKochi 7.71.5×
- 423NarashinoChiba 7.71.5×
- 423KaminomaAichi 7.71.5×
- 437NumataGunma 7.61.5×
- 437NiimiOkayama 7.61.5×
- 437IidaNagano 7.61.5×
- 437MiuraKanagawa 7.61.5×
- 437UwajimaEhime 7.61.5×
- 437YamagataYamagata 7.61.5×
- 437NaritaChiba 7.61.5×
- 437MitoIbaraki 7.61.5×
- 437MatsushimaMiyagi 7.61.5×
- 437KōriyamaFukushima 7.61.5×
- 437KasamaIbaraki 7.61.5×
- 437IshiokaIbaraki 7.61.5×
- 437Hitachi-NakaIbaraki 7.61.5×
- 437EbinaKanagawa 7.61.5×
- 437AkishimaTokyo 7.61.5×
- 437Minami-SōmaFukushima 7.61.5×
- 437SōsaChiba 7.61.5×
- 437InzaiChiba 7.61.5×
- 455ShironeNiigata 7.51.5×
- 455ShimadaShizuoka 7.51.5×
- 455IbiGifu 7.51.5×
- 455HamamatsuShizuoka 7.51.5×
- 455FujinomiyaShizuoka 7.51.5×
- 455MinamiuonumaNiigata 7.51.5×
- 455HigashimurayamaTokyo 7.51.5×
- 455ShirakawaFukushima 7.51.5×
- 463YokosukaKanagawa 7.41.5×
- 463ShinagawaEhime 7.41.5×
- 463ShimodaShizuoka 7.41.5×
- 463YonoOsaka 7.41.5×
- 463FujiyoshidaYamanashi 7.41.5×
- 468SuwaNagano 7.31.5×
- 468SakaiminatoTottori 7.31.5×
- 468OnoFukui 7.31.5×
- 468MatsumotoNagano 7.31.5×
- 468MatsudoChiba 7.31.5×
- 473UenoharaYamanashi 7.21.4×
- 473FujiedaShizuoka 7.21.4×
- 473SendaiMiyagi 7.21.4×
- 473MobaraChiba 7.21.4×
- 473IchinosekiIwate 7.21.4×
- 473AsahikawaHokkaido 7.21.4×
- 473OyabeToyama 7.21.4×
- 473AmamiKagoshima 7.21.4×
- 481UedaNagano 7.11.4×
- 481TateyamaChiba 7.11.4×
- 481AnamizuIshikawa 7.11.4×
- 481AjikiChiba 7.11.4×
- 481HakodateHokkaido 7.11.4×
- 481NasukarasuyamaTochigi 7.11.4×
- 481MinamibōsōChiba 7.11.4×
- 488ImaichiTochigi 7.01.4×
- 488HamakitaShizuoka 7.01.4×
- 488YokoshibaChiba 7.01.4×
- 488SawaraChiba 7.01.4×
- 488ŌharaChiba 7.01.4×
- 488KitaibarakiIbaraki 7.01.4×
- 488MinamiashigaraKanagawa 7.01.4×
- 488IzunokuniShizuoka 7.01.4×
- 488KaizuGifu 7.01.4×
- 497OwaseMie 6.91.4×
- 497OgawamachiSaitama 6.91.4×
- 497Niitsu-honchōNiigata 6.91.4×
- 497MakiNiigata 6.91.4×
- 497WakuyaMiyagi 6.91.4×
- 497ŌamiChiba 6.91.4×
- 497HitachiomiyaIbaraki 6.91.4×
- 497ChikumaNagano 6.91.4×
- 505HitachiIbaraki 6.81.4×
- 505KōkaShiga 6.81.4×
- 505Aizu-WakamatsuFukushima 6.81.4×
- 505SodegauraChiba 6.81.4×
- 509OmigawaChiba 6.71.3×
- 509HanamakiIwate 6.71.3×
- 509SapporoHokkaido 6.71.3×
- 509KitamiHokkaido 6.71.3×
- 513NonoichiIshikawa 6.61.3×
- 514SakuNagano 6.51.3×
- 514ObihiroHokkaido 6.51.3×
- 514TakizawaIwate 6.51.3×
- 517OkayaNagano 6.41.3×
- 517ŌgakiGifu 6.41.3×
- 517TōganeChiba 6.41.3×
- 517KujiIwate 6.41.3×
- 517KuriharaMiyagi 6.41.3×
- 517TomeMiyagi 6.41.3×
- 523KogaIbaraki 6.31.3×
- 524GeroGifu 6.11.2×
- 524KatsuuraChiba 6.11.2×
- 524KamaishiIwate 6.11.2×
- 524TomakomaiHokkaido 6.11.2×
- 528InaNagano 5.81.2×
- 528ŌshūIwate 5.81.2×
- 530KushiroHokkaido 5.61.1×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+