SmogRank / Cleaner or dirtier / Japan

Japan: cleaner or dirtier, 2026

In Japan, 557 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 30 got dirtier and 517 cleaner.

The 30 cities that got dirtier, biggest rise first

#	City	2025	2026	Change
1	MiyakoIwate, Japan	29	46	+3.1 µg/m³+60%
2	MinokamoGifu, Japan	34	46	+2.2 µg/m³+36%
3	SumotoHyōgo, Japan	46	52	+1.4 µg/m³+17%
4	ŌdateAkita, Japan	48	52	+0.9 µg/m³+10%
5	HekinanAichi, Japan	47	52	+0.9 µg/m³+11%
6	HagiYamaguchi, Japan	47	51	+0.9 µg/m³+11%
7	TonoshōKagawa, Japan	50	52	+0.8 µg/m³+9%
8	AmamiKagoshima, Japan	37	41	+0.7 µg/m³+11%
9	NishiwakiHyōgo, Japan	50	52	+0.6 µg/m³+7%
10	InuyamaAichi, Japan	48	51	+0.6 µg/m³+7%
11	Kashima-shiIbaraki, Japan	48	51	+0.5 µg/m³+6%
12	ObihiroHokkaido, Japan	34	36	+0.4 µg/m³+7%
13	TakeoSaga, Japan	51	52	+0.3 µg/m³+3%
14	KogaFukuoka, Japan	50	51	+0.3 µg/m³+3%
15	MunakataFukuoka, Japan	48	49	+0.3 µg/m³+3%
16	KaratsuSaga, Japan	47	49	+0.3 µg/m³+4%
17	AomoriJapan	42	44	+0.3 µg/m³+4%
18	KitamiHokkaido, Japan	36	37	+0.3 µg/m³+5%
19	KamisuIbaraki, Japan	54	55	+0.3 µg/m³+3%
20	SaseboNagasaki, Japan	52	53	+0.3 µg/m³+3%
21	MatsuuraNagasaki, Japan	52	52	+0.2 µg/m³+2%
22	NoshiroAkita, Japan	46	47	+0.2 µg/m³+2%
23	MuroranHokkaido, Japan	46	47	+0.2 µg/m³+2%
24	SagaJapan	52	52	+0.2 µg/m³+2%
25	KashimaSaga, Japan	51	52	+0.2 µg/m³+2%
26	TakuSaga, Japan	51	52	+0.2 µg/m³+2%
27	MinamichitaAichi, Japan	47	48	+0.2 µg/m³+2%
28	OgaAkita, Japan	51	51	+0.1 µg/m³+1%
29	KogaFukuoka, Japan	53	53	+0.1 µg/m³+1%
30	HakodateHokkaido, Japan	38	39	+0.1 µg/m³+1%

The 517 cities that got cleaner, biggest fall first

#	City	2025	2026	Change
1	ŌtsukiYamanashi, Japan	61	43	−6.6 µg/m³−46%
2	ŌgakiGifu, Japan	54	31	−5.3 µg/m³−49%
3	NakatsuOita, Japan	59	49	−4.7 µg/m³−35%
4	AnanTokushima, Japan	60	52	−4.4 µg/m³−31%
5	MimaTokushima, Japan	58	51	−4.0 µg/m³−31%
6	KariyaHyōgo, Japan	58	52	−3.3 µg/m³−26%
7	OwaseMie, Japan	53	38	−3.3 µg/m³−32%
8	AyaseKanagawa, Japan	57	50	−3.1 µg/m³−26%
9	SaikiOita, Japan	55	46	−3.0 µg/m³−27%
10	SandachōHyōgo, Japan	57	51	−3.0 µg/m³−25%
11	AioiHyōgo, Japan	57	52	−2.9 µg/m³−24%
12	UozuToyama, Japan	55	48	−2.8 µg/m³−24%
13	TatsunoHyōgo, Japan	56	50	−2.8 µg/m³−24%
14	ImabariEhime, Japan	59	54	−2.8 µg/m³−21%
15	TamanoOkayama, Japan	59	54	−2.8 µg/m³−21%
16	IgaMie, Japan	55	47	−2.8 µg/m³−25%
17	IkomaNara, Japan	55	47	−2.8 µg/m³−25%
18	YoukaichiShiga, Japan	56	49	−2.8 µg/m³−24%
19	OkayamaJapan	57	51	−2.8 µg/m³−23%
20	HigashinozoeHyōgo, Japan	58	53	−2.8 µg/m³−21%
21	ShikokuchūōEhime, Japan	59	54	−2.8 µg/m³−21%
22	YaoOsaka, Japan	55	48	−2.7 µg/m³−24%
23	Kashihara-shiNara, Japan	55	48	−2.7 µg/m³−24%
24	Kamojimachō-jōgejimaTokushima, Japan	55	47	−2.7 µg/m³−24%
25	KofuYamanashi, Japan	56	49	−2.7 µg/m³−23%
26	GyōdaSaitama, Japan	57	52	−2.7 µg/m³−22%
27	IkedachōTokushima, Japan	57	52	−2.7 µg/m³−22%
28	NabariMie, Japan	55	48	−2.6 µg/m³−23%
29	SekimachiGifu, Japan	55	49	−2.6 µg/m³−23%
30	ShidoKagawa, Japan	58	53	−2.6 µg/m³−20%
31	BizenOkayama, Japan	59	54	−2.6 µg/m³−19%
32	GifuJapan	54	47	−2.5 µg/m³−23%
33	HabikinoOsaka, Japan	55	47	−2.5 µg/m³−23%
34	SakaiOsaka, Japan	56	51	−2.5 µg/m³−21%
35	BeppuOita, Japan	58	53	−2.5 µg/m³−20%
36	HayashimaOkayama, Japan	58	53	−2.5 µg/m³−19%
37	AsoKumamoto, Japan	53	44	−2.4 µg/m³−23%
38	HirakataOsaka, Japan	54	47	−2.4 µg/m³−22%
39	TsuMie, Japan	54	47	−2.4 µg/m³−22%
40	HiragiKagawa, Japan	56	52	−2.4 µg/m³−20%
41	KashiwaraNara, Japan	56	52	−2.4 µg/m³−20%
42	TsuyamaOkayama, Japan	56	52	−2.4 µg/m³−20%
43	AkashiHyōgo, Japan	56	52	−2.4 µg/m³−20%
44	OnoHyōgo, Japan	56	52	−2.4 µg/m³−20%
45	MarugameKagawa, Japan	58	53	−2.4 µg/m³−19%
46	KasaokaOkayama, Japan	58	53	−2.4 µg/m³−19%
47	KurashikiOkayama, Japan	59	55	−2.4 µg/m³−18%
48	KisoNagano, Japan	49	37	−2.3 µg/m³−26%
49	JōyōKyoto, Japan	54	48	−2.3 µg/m³−21%
50	SugaiKyoto, Japan	55	48	−2.3 µg/m³−21%
51	KameyamaMie, Japan	55	48	−2.3 µg/m³−21%
52	IkarugaHyōgo, Japan	55	50	−2.3 µg/m³−20%
53	OsakaJapan	56	52	−2.3 µg/m³−19%
54	KōkaShiga, Japan	51	38	−2.3 µg/m³−25%
55	YonoOsaka, Japan	52	41	−2.3 µg/m³−24%
56	SayamaOsaka, Japan	53	44	−2.3 µg/m³−23%
57	HashimaGifu, Japan	54	46	−2.3 µg/m³−22%
58	TakinomiyaKagawa, Japan	54	47	−2.3 µg/m³−21%
59	UwajimaEhime, Japan	52	42	−2.2 µg/m³−22%
60	IyoEhime, Japan	55	51	−2.2 µg/m³−19%
61	FukuroiShizuoka, Japan	55	51	−2.2 µg/m³−19%
62	YokkaichiMie, Japan	56	52	−2.2 µg/m³−19%
63	AsakuchiOkayama, Japan	57	53	−2.2 µg/m³−18%
64	TsuchiuraIbaraki, Japan	58	54	−2.2 µg/m³−17%
65	KakegawaShizuoka, Japan	52	43	−2.2 µg/m³−22%
66	SakuNagano, Japan	48	36	−2.2 µg/m³−25%
67	IshiokaIbaraki, Japan	52	42	−2.2 µg/m³−23%
68	ŌtsuShiga, Japan	53	44	−2.2 µg/m³−22%
69	KizugawaKyoto, Japan	54	46	−2.2 µg/m³−21%
70	KosaiShizuoka, Japan	54	47	−2.2 µg/m³−21%
71	HōfuYamaguchi, Japan	54	47	−2.2 µg/m³−21%
72	Kawachi-NaganoOsaka, Japan	54	47	−2.2 µg/m³−21%
73	YawataKyoto, Japan	56	52	−2.2 µg/m³−18%
74	HigashihiroshimaHiroshima, Japan	58	53	−2.2 µg/m³−17%
75	YoshinogawaTokushima, Japan	53	46	−2.1 µg/m³−20%
76	GionHiroshima, Japan	54	48	−2.1 µg/m³−19%
77	TakarazukaHyōgo, Japan	54	48	−2.1 µg/m³−19%
78	Ueno-ebisumachiMie, Japan	54	48	−2.1 µg/m³−19%
79	YaeHiroshima, Japan	54	48	−2.1 µg/m³−19%
80	KōtariKyoto, Japan	55	51	−2.1 µg/m³−19%
81	TsurusakiOita, Japan	55	51	−2.1 µg/m³−19%
82	TokiGifu, Japan	56	52	−2.1 µg/m³−18%
83	NiihamaEhime, Japan	59	55	−2.1 µg/m³−16%
84	KaminomaAichi, Japan	52	43	−2.1 µg/m³−21%
85	AkishimaTokyo, Japan	52	43	−2.1 µg/m³−21%
86	InaNagano, Japan	43	32	−2.1 µg/m³−27%
87	ChikumaNagano, Japan	50	38	−2.1 µg/m³−23%
88	AtamiShizuoka, Japan	52	42	−2.1 µg/m³−22%
89	ŌmeTokyo, Japan	53	44	−2.1 µg/m³−21%
90	ToyonakaOsaka, Japan	53	45	−2.1 µg/m³−21%
91	YawatahamaEhime, Japan	54	47	−2.1 µg/m³−20%
92	KusatsuShiga, Japan	54	48	−2.1 µg/m³−20%
93	Narutochō-mitsuishiTokushima, Japan	56	52	−2.1 µg/m³−18%
94	KishiwadaOsaka, Japan	56	52	−2.1 µg/m³−18%
95	ShimogamoOkayama, Japan	57	53	−2.1 µg/m³−17%
96	SaijōEhime, Japan	60	56	−2.1 µg/m³−15%
97	ŌmihachimanShiga, Japan	52	43	−2.0 µg/m³−20%
98	IzunokuniShizuoka, Japan	47	36	−2.0 µg/m³−24%
99	EbinaKanagawa, Japan	52	42	−2.0 µg/m³−21%
100	SennanOsaka, Japan	53	46	−2.0 µg/m³−20%
101	TondabayashichōOsaka, Japan	53	46	−2.0 µg/m³−20%
102	AmaAichi, Japan	53	46	−2.0 µg/m³−19%
103	GobōWakayama, Japan	53	46	−2.0 µg/m³−19%
104	ChiryūAichi, Japan	54	47	−2.0 µg/m³−19%
105	HikoneShiga, Japan	54	47	−2.0 µg/m³−19%
106	IwakiFukushima, Japan	54	48	−2.0 µg/m³−19%
107	AgeoSaitama, Japan	55	50	−2.0 µg/m³−18%
108	HimejiHyōgo, Japan	55	50	−2.0 µg/m³−18%
109	TakashimaShiga, Japan	55	51	−2.0 µg/m³−18%
110	KainanWakayama, Japan	55	51	−2.0 µg/m³−18%
111	ŌitaOita, Japan	55	52	−2.0 µg/m³−18%
112	MatsuyamaEhime, Japan	56	52	−2.0 µg/m³−17%
113	KureHiroshima, Japan	56	52	−2.0 µg/m³−17%
114	SōjaOkayama, Japan	56	53	−2.0 µg/m³−17%
115	Kakogawachō-honmachiHyōgo, Japan	57	53	−2.0 µg/m³−16%
116	FujinomiyaShizuoka, Japan	52	42	−1.9 µg/m³−20%
117	KumanoMie, Japan	52	44	−1.9 µg/m³−19%
118	AnjōAichi, Japan	52	44	−1.9 µg/m³−19%
119	ToyotaAichi, Japan	52	44	−1.9 µg/m³−19%
120	KitahamaShiga, Japan	53	45	−1.9 µg/m³−19%
121	TokorozawaSaitama, Japan	53	45	−1.9 µg/m³−19%
122	TajimiGifu, Japan	53	47	−1.9 µg/m³−18%
123	KuwanaMie, Japan	54	48	−1.9 µg/m³−18%
124	IzumiOsaka, Japan	54	48	−1.9 µg/m³−18%
125	IrumaSaitama, Japan	54	48	−1.9 µg/m³−18%
126	UjiKyoto, Japan	54	48	−1.9 µg/m³−18%
127	MatsusakaMie, Japan	55	52	−1.9 µg/m³−17%
128	ZentsujichóKagawa, Japan	56	53	−1.9 µg/m³−16%
129	HigashiosakaOsaka, Japan	57	53	−1.9 µg/m³−15%
130	IbiGifu, Japan	51	40	−1.9 µg/m³−21%
131	KaizuGifu, Japan	51	41	−1.9 µg/m³−21%
132	NiimiOkayama, Japan	52	43	−1.9 µg/m³−20%
133	TokushimaJapan	53	46	−1.9 µg/m³−19%
134	KameokaKyoto, Japan	54	49	−1.9 µg/m³−18%
135	KariyaAichi, Japan	56	52	−1.9 µg/m³−16%
136	HamakitaShizuoka, Japan	49	39	−1.8 µg/m³−20%
137	HamamatsuShizuoka, Japan	51	42	−1.8 µg/m³−19%
138	HiratsukaKanagawa, Japan	52	44	−1.8 µg/m³−18%
139	HigashikurumeTokyo, Japan	53	46	−1.8 µg/m³−18%
140	KōnosuSaitama, Japan	53	48	−1.8 µg/m³−17%
141	SanoTochigi, Japan	54	48	−1.8 µg/m³−17%
142	AyabeKyoto, Japan	54	50	−1.8 µg/m³−17%
143	MenumaSaitama, Japan	54	50	−1.8 µg/m³−17%
144	TakahashiOkayama, Japan	55	52	−1.8 µg/m³−16%
145	AmagasakiHyōgo, Japan	56	53	−1.8 µg/m³−15%
146	TakamatsuKagawa, Japan	57	54	−1.8 µg/m³−15%
147	Shin’ichiHiroshima, Japan	60	56	−1.8 µg/m³−13%
148	YachiyoChiba, Japan	52	44	−1.8 µg/m³−19%
149	MaizuruKyoto, Japan	53	47	−1.8 µg/m³−18%
150	KobeHyōgo, Japan	54	49	−1.8 µg/m³−17%
151	SaikūMie, Japan	54	49	−1.8 µg/m³−17%
152	ChigasakiKanagawa, Japan	54	49	−1.8 µg/m³−17%
153	IzumisanoOsaka, Japan	54	49	−1.8 µg/m³−17%
154	ShibukawaGunma, Japan	54	49	−1.8 µg/m³−17%
155	NishinomiyaHyōgo, Japan	55	51	−1.8 µg/m³−16%
156	NantanKyoto, Japan	55	52	−1.8 µg/m³−16%
157	ŌzuKumamoto, Japan	56	52	−1.8 µg/m³−15%
158	IidaNagano, Japan	51	42	−1.7 µg/m³−18%
159	MiyazuKyoto, Japan	52	46	−1.7 µg/m³−17%
160	Higashi-MatsuyamaSaitama, Japan	53	48	−1.7 µg/m³−16%
161	HandaAichi, Japan	53	48	−1.7 µg/m³−16%
162	ShūnanYamaguchi, Japan	54	51	−1.7 µg/m³−16%
163	MinamataKumamoto, Japan	54	51	−1.7 µg/m³−16%
164	OkazakiAichi, Japan	54	51	−1.7 µg/m³−16%
165	SuzukaMie, Japan	54	51	−1.7 µg/m³−16%
166	FujiedaShizuoka, Japan	49	40	−1.7 µg/m³−19%
167	SakaiminatoTottori, Japan	49	40	−1.7 µg/m³−19%
168	MatsudoChiba, Japan	50	41	−1.7 µg/m³−19%
169	AjikiChiba, Japan	48	39	−1.7 µg/m³−20%
170	HigashimurayamaTokyo, Japan	51	41	−1.7 µg/m³−19%
171	KumaEhime, Japan	51	41	−1.7 µg/m³−19%
172	ShinagawaEhime, Japan	51	41	−1.7 µg/m³−19%
173	ObamaFukui, Japan	52	44	−1.7 µg/m³−18%
174	MieOita, Japan	54	49	−1.7 µg/m³−16%
175	InabeMie, Japan	54	50	−1.7 µg/m³−16%
176	NiizaSaitama, Japan	54	50	−1.7 µg/m³−16%
177	Misato, SaitamaSaitama, Japan	54	50	−1.7 µg/m³−16%
178	NagahamaShiga, Japan	54	50	−1.7 µg/m³−16%
179	TatebayashiGunma, Japan	54	50	−1.7 µg/m³−16%
180	IwakuniYamaguchi, Japan	55	52	−1.7 µg/m³−15%
181	MiharaHiroshima, Japan	55	52	−1.7 µg/m³−15%
182	HiroshimaJapan	55	52	−1.7 µg/m³−15%
183	TaharaAichi, Japan	56	53	−1.7 µg/m³−14%
184	FuchūTokyo, Japan	52	46	−1.6 µg/m³−16%
185	YanaiYamaguchi, Japan	52	46	−1.6 µg/m³−16%
186	IseMie, Japan	53	48	−1.6 µg/m³−16%
187	NishioAichi, Japan	54	51	−1.6 µg/m³−15%
188	HōryūjiNara, Japan	55	52	−1.6 µg/m³−14%
189	MatsumotoNagano, Japan	49	40	−1.6 µg/m³−18%
190	BarakiChiba, Japan	51	43	−1.6 µg/m³−17%
191	MinanoSaitama, Japan	52	43	−1.6 µg/m³−17%
192	OmigawaChiba, Japan	46	37	−1.6 µg/m³−20%
193	OgawamachiSaitama, Japan	47	38	−1.6 µg/m³−19%
194	KamakuraKanagawa, Japan	52	44	−1.6 µg/m³−17%
195	SetoAichi, Japan	52	44	−1.6 µg/m³−17%
196	OdawaraKanagawa, Japan	52	45	−1.6 µg/m³−16%
197	SabaeFukui, Japan	52	45	−1.6 µg/m³−16%
198	AzaminoKanagawa, Japan	52	46	−1.6 µg/m³−16%
199	KodairaTokyo, Japan	53	47	−1.6 µg/m³−16%
200	HonmachiKumamoto, Japan	55	52	−1.6 µg/m³−14%
201	IwadeWakayama, Japan	55	52	−1.6 µg/m³−14%
202	TamanaKumamoto, Japan	55	52	−1.6 µg/m³−14%
203	IshinomakiMiyagi, Japan	56	53	−1.6 µg/m³−13%
204	Kan’onjichōKagawa, Japan	57	54	−1.6 µg/m³−13%
205	FujiyoshidaYamanashi, Japan	49	41	−1.5 µg/m³−17%
206	SaikuboGunma, Japan	49	41	−1.5 µg/m³−17%
207	YachimataChiba, Japan	51	43	−1.5 µg/m³−16%
208	UrayasuChiba, Japan	51	43	−1.5 µg/m³−16%
209	OkayaNagano, Japan	44	36	−1.5 µg/m³−19%
210	KōzakiChiba, Japan	47	39	−1.5 µg/m³−18%
211	SawaraChiba, Japan	47	39	−1.5 µg/m³−18%
212	YokosukaKanagawa, Japan	49	41	−1.5 µg/m³−17%
213	BandōIbaraki, Japan	52	44	−1.5 µg/m³−16%
214	HadanoKanagawa, Japan	52	45	−1.5 µg/m³−16%
215	YamatoKanagawa, Japan	52	46	−1.5 µg/m³−15%
216	IchinomiyaAichi, Japan	52	47	−1.5 µg/m³−15%
217	Sakai-nakajimaGunma, Japan	53	48	−1.5 µg/m³−15%
218	YoriiSaitama, Japan	53	48	−1.5 µg/m³−15%
219	KinokawaWakayama, Japan	53	48	−1.5 µg/m³−15%
220	KiryūGunma, Japan	53	48	−1.5 µg/m³−15%
221	TokyoJapan	53	48	−1.5 µg/m³−15%
222	HitoyoshiKumamoto, Japan	53	49	−1.5 µg/m³−15%
223	SakadoSaitama, Japan	53	49	−1.5 µg/m³−14%
224	NakaIbaraki, Japan	54	51	−1.5 µg/m³−14%
225	OyamaTochigi, Japan	54	51	−1.5 µg/m³−14%
226	TakeharaHiroshima, Japan	54	51	−1.5 µg/m³−14%
227	KyotoJapan	54	51	−1.5 µg/m³−14%
228	NagaiYamagata, Japan	55	52	−1.5 µg/m³−13%
229	MitoIbaraki, Japan	51	43	−1.5 µg/m³−16%
230	KikugawaShizuoka, Japan	51	43	−1.5 µg/m³−16%
231	KatsuuraChiba, Japan	41	33	−1.4 µg/m³−19%
232	YokoshibaChiba, Japan	46	38	−1.4 µg/m³−17%
233	MotonaChiba, Japan	47	39	−1.4 µg/m³−17%
234	MinamiashigaraKanagawa, Japan	47	39	−1.4 µg/m³−16%
235	MobaraChiba, Japan	47	39	−1.4 µg/m³−16%
236	NaritaChiba, Japan	49	42	−1.4 µg/m³−16%
237	KasamaIbaraki, Japan	50	42	−1.4 µg/m³−16%
238	FujisawaKanagawa, Japan	51	44	−1.4 µg/m³−15%
239	YaitaTochigi, Japan	51	44	−1.4 µg/m³−15%
240	KashiwaChiba, Japan	52	45	−1.4 µg/m³−15%
241	KasukabeSaitama, Japan	52	45	−1.4 µg/m³−15%
242	KawagoeSaitama, Japan	52	45	−1.4 µg/m³−15%
243	KamagayaChiba, Japan	52	46	−1.4 µg/m³−15%
244	ChibaJapan	52	46	−1.4 µg/m³−15%
245	KumagayaSaitama, Japan	52	46	−1.4 µg/m³−15%
246	MitaiMiyazaki, Japan	52	46	−1.4 µg/m³−15%
247	NagasakiJapan	52	46	−1.4 µg/m³−15%
248	SaitamaJapan	52	47	−1.4 µg/m³−14%
249	MiyoshiHiroshima, Japan	52	47	−1.4 µg/m³−14%
250	MikuniFukui, Japan	52	47	−1.4 µg/m³−14%
251	MineYamaguchi, Japan	53	48	−1.4 µg/m³−14%
252	Kodamachō-kodamaminamiSaitama, Japan	53	48	−1.4 µg/m³−14%
253	KawaguchiSaitama, Japan	53	48	−1.4 µg/m³−14%
254	MorohongōSaitama, Japan	53	48	−1.4 µg/m³−14%
255	NagoyaAichi, Japan	53	49	−1.4 µg/m³−14%
256	FukuchiyamaKyoto, Japan	54	51	−1.4 µg/m³−13%
257	Tottori-shiTottori, Japan	56	53	−1.4 µg/m³−12%
258	MinamiuonumaNiigata, Japan	48	41	−1.4 µg/m³−16%
259	OnoFukui, Japan	48	41	−1.4 µg/m³−16%
260	KyōtangoKyoto, Japan	51	43	−1.4 µg/m³−15%
261	ShizuokaJapan	51	43	−1.4 µg/m³−15%
262	TsurugaFukui, Japan	51	43	−1.4 µg/m³−15%
263	TobaMie, Japan	52	46	−1.4 µg/m³−14%
264	YokohamaKanagawa, Japan	52	46	−1.4 µg/m³−14%
265	AtsugiKanagawa, Japan	52	46	−1.4 µg/m³−14%
266	SagaeYamagata, Japan	53	49	−1.4 µg/m³−14%
267	MinamibōsōChiba, Japan	46	39	−1.3 µg/m³−16%
268	ImaichiTochigi, Japan	46	39	−1.3 µg/m³−16%
269	TateyamaChiba, Japan	47	39	−1.3 µg/m³−15%
270	NarashinoChiba, Japan	49	42	−1.3 µg/m³−15%
271	KōriyamaFukushima, Japan	49	42	−1.3 µg/m³−15%
272	KisarazuChiba, Japan	49	42	−1.3 µg/m³−15%
273	KumagawaFukui, Japan	49	42	−1.3 µg/m³−15%
274	TochigiJapan	49	42	−1.3 µg/m³−15%
275	Ōdachō-ōdaShimane, Japan	51	44	−1.3 µg/m³−14%
276	ShimaMie, Japan	51	44	−1.3 µg/m³−14%
277	GotembaShizuoka, Japan	52	45	−1.3 µg/m³−14%
278	MasudaShimane, Japan	52	45	−1.3 µg/m³−14%
279	NumazuShizuoka, Japan	52	46	−1.3 µg/m³−14%
280	KawaguchiTokushima, Japan	52	47	−1.3 µg/m³−13%
281	BuzenFukuoka, Japan	53	48	−1.3 µg/m³−13%
282	KanbaraShizuoka, Japan	53	48	−1.3 µg/m³−13%
283	YokotaTokyo, Japan	53	48	−1.3 µg/m³−13%
284	HikariYamaguchi, Japan	53	51	−1.3 µg/m³−13%
285	IgusaSaitama, Japan	53	51	−1.3 µg/m³−13%
286	KikuchiKumamoto, Japan	55	52	−1.3 µg/m³−12%
287	TenriNara, Japan	55	53	−1.3 µg/m³−12%
288	OnomichiHiroshima, Japan	61	58	−1.3 µg/m³−9%
289	TōganeChiba, Japan	43	36	−1.3 µg/m³−17%
290	HitachiIbaraki, Japan	44	37	−1.3 µg/m³−16%
291	Aizu-WakamatsuFukushima, Japan	45	38	−1.3 µg/m³−16%
292	Minami-AlpsYamanashi, Japan	51	43	−1.3 µg/m³−14%
293	YotsukaidōChiba, Japan	51	43	−1.3 µg/m³−14%
294	HamadaShimane, Japan	51	43	−1.3 µg/m³−14%
295	HitachiomiyaIbaraki, Japan	46	38	−1.3 µg/m³−16%
296	ŌyauchiFukushima, Japan	48	41	−1.3 µg/m³−15%
297	SuwaNagano, Japan	48	41	−1.3 µg/m³−15%
298	InashikiIbaraki, Japan	51	44	−1.3 µg/m³−14%
299	KanumaTochigi, Japan	51	44	−1.3 µg/m³−14%
300	HannōSaitama, Japan	52	46	−1.3 µg/m³−14%
301	ToyohashiAichi, Japan	52	46	−1.3 µg/m³−14%
302	UtsunomiyaTochigi, Japan	52	46	−1.3 µg/m³−14%
303	NodaChiba, Japan	52	47	−1.3 µg/m³−13%
304	SōkaSaitama, Japan	53	49	−1.3 µg/m³−13%
305	ToyookaHyōgo, Japan	53	49	−1.3 µg/m³−13%
306	TōkaiAichi, Japan	54	51	−1.3 µg/m³−12%
307	UkihaFukuoka, Japan	54	51	−1.3 µg/m³−12%
308	KotōKumamoto, Japan	55	52	−1.3 µg/m³−12%
309	KaniGifu, Japan	55	52	−1.3 µg/m³−12%
310	ŌtakeHiroshima, Japan	55	52	−1.3 µg/m³−12%
311	OwariasahiAichi, Japan	57	54	−1.3 µg/m³−11%
312	InzaiChiba, Japan	49	42	−1.2 µg/m³−14%
313	Hitachi-NakaIbaraki, Japan	49	42	−1.2 µg/m³−14%
314	MiuraKanagawa, Japan	49	42	−1.2 µg/m³−14%
315	SakuraChiba, Japan	52	46	−1.2 µg/m³−13%
316	YonagoTottori, Japan	52	48	−1.2 µg/m³−12%
317	KudamatsuYamaguchi, Japan	52	48	−1.2 µg/m³−12%
318	ChikuseiIbaraki, Japan	53	51	−1.2 µg/m³−12%
319	SodegauraChiba, Japan	44	37	−1.2 µg/m³−15%
320	NankokuKochi, Japan	49	43	−1.2 µg/m³−13%
321	ShimodaShizuoka, Japan	48	41	−1.2 µg/m³−14%
322	NoboritoKanagawa, Japan	51	44	−1.2 µg/m³−13%
323	SayamaSaitama, Japan	51	44	−1.2 µg/m³−13%
324	YonezawaYamagata, Japan	52	46	−1.2 µg/m³−13%
325	HonjōSaitama, Japan	52	46	−1.2 µg/m³−13%
326	HanyūSaitama, Japan	52	47	−1.2 µg/m³−12%
327	MizuhoGifu, Japan	52	47	−1.2 µg/m³−12%
328	GamagōriAichi, Japan	52	47	−1.2 µg/m³−12%
329	KoshigayaSaitama, Japan	52	47	−1.2 µg/m³−12%
330	AshikagaTochigi, Japan	53	49	−1.2 µg/m³−12%
331	KochiJapan	53	50	−1.2 µg/m³−12%
332	UtoKumamoto, Japan	54	52	−1.2 µg/m³−11%
333	ItoigawaNiigata, Japan	55	52	−1.2 µg/m³−11%
334	NyūzenToyama, Japan	55	53	−1.2 µg/m³−11%
335	MinatoWakayama, Japan	55	53	−1.2 µg/m³−11%
336	YameFukuoka, Japan	51	46	−1.1 µg/m³−12%
337	KurayoshiTottori, Japan	54	52	−1.1 µg/m³−10%
338	NakanojōGunma, Japan	49	43	−1.1 µg/m³−13%
339	MizunashiFukushima, Japan	42	36	−1.1 µg/m³−15%
340	KitaibarakiIbaraki, Japan	44	38	−1.1 µg/m³−14%
341	NasukarasuyamaTochigi, Japan	45	39	−1.1 µg/m³−14%
342	UedaNagano, Japan	45	39	−1.1 µg/m³−14%
343	ShirakawaFukushima, Japan	48	42	−1.1 µg/m³−13%
344	YamagataJapan	48	42	−1.1 µg/m³−13%
345	NumataGunma, Japan	48	42	−1.1 µg/m³−13%
346	NisshinAichi, Japan	50	44	−1.1 µg/m³−12%
347	SōmaFukushima, Japan	51	45	−1.1 µg/m³−12%
348	KagaIshikawa, Japan	51	45	−1.1 µg/m³−12%
349	ŌuchiMiyagi, Japan	51	45	−1.1 µg/m³−12%
350	ObuseNagano, Japan	51	45	−1.1 µg/m³−12%
351	SuzakaNagano, Japan	51	45	−1.1 µg/m³−12%
352	InoKochi, Japan	52	46	−1.1 µg/m³−12%
353	KaminokawaTochigi, Japan	52	46	−1.1 µg/m³−12%
354	ChitoseHokkaido, Japan	52	48	−1.1 µg/m³−11%
355	IwanumaMiyagi, Japan	52	48	−1.1 µg/m³−11%
356	KukichūōSaitama, Japan	52	49	−1.1 µg/m³−11%
357	SakataYamagata, Japan	53	50	−1.1 µg/m³−11%
358	AsakaSaitama, Japan	53	51	−1.1 µg/m³−11%
359	MinamirinkanKanagawa, Japan	53	51	−1.1 µg/m³−11%
360	KumamotoJapan	54	52	−1.1 µg/m³−10%
361	MiyakonojōMiyazaki, Japan	55	53	−1.1 µg/m³−10%
362	Uekimachi-mōnoKumamoto, Japan	55	53	−1.1 µg/m³−10%
363	Tanushimarumachi-toyokiFukuoka, Japan	57	55	−1.1 µg/m³−9%
364	FukuyamaHiroshima, Japan	59	57	−1.1 µg/m³−8%
365	TorideIbaraki, Japan	49	43	−1.0 µg/m³−11%
366	Niitsu-honchōNiigata, Japan	43	38	−1.0 µg/m³−13%
367	IchinomiyaChiba, Japan	44	39	−1.0 µg/m³−12%
368	ŌharaChiba, Japan	44	39	−1.0 µg/m³−12%
369	HigashineYamagata, Japan	49	44	−1.0 µg/m³−11%
370	KomatsuIshikawa, Japan	50	44	−1.0 µg/m³−11%
371	MachidaTokyo, Japan	51	45	−1.0 µg/m³−11%
372	FujiShizuoka, Japan	51	46	−1.0 µg/m³−11%
373	TonamiToyama, Japan	52	47	−1.0 µg/m³−11%
374	SendaiKagoshima, Japan	52	47	−1.0 µg/m³−11%
375	YamaguchiJapan	52	48	−1.0 µg/m³−10%
376	AiharaKanagawa, Japan	52	49	−1.0 µg/m³−10%
377	TanabeWakayama, Japan	52	49	−1.0 µg/m³−10%
378	YukuhashiFukuoka, Japan	53	51	−1.0 µg/m³−10%
379	TomiokaGunma, Japan	53	51	−1.0 µg/m³−10%
380	KandaFukuoka, Japan	54	52	−1.0 µg/m³−9%
381	ŌmutaFukuoka, Japan	56	54	−1.0 µg/m³−8%
382	KuriharaMiyagi, Japan	40	35	−0.9 µg/m³−13%
383	MookaTochigi, Japan	49	44	−0.9 µg/m³−10%
384	GōtsuchōShimane, Japan	49	44	−0.9 µg/m³−10%
385	KimitsuChiba, Japan	51	46	−0.9 µg/m³−10%
386	HakuiIshikawa, Japan	51	46	−0.9 µg/m³−10%
387	YasugichōShimane, Japan	51	46	−0.9 µg/m³−10%
388	AkiKochi, Japan	51	47	−0.9 µg/m³−10%
389	Ureshinomachi-shimojukuSaga, Japan	51	47	−0.9 µg/m³−10%
390	KirishimaKagoshima, Japan	52	48	−0.9 µg/m³−9%
391	JōsōIbaraki, Japan	52	48	−0.9 µg/m³−9%
392	KasugaFukuoka, Japan	52	48	−0.9 µg/m³−9%
393	KobayashiMiyazaki, Japan	52	50	−0.9 µg/m³−9%
394	NagatoYamaguchi, Japan	53	51	−0.9 µg/m³−9%
395	ImizuToyama, Japan	54	52	−0.9 µg/m³−9%
396	ShimonosekiYamaguchi, Japan	54	52	−0.9 µg/m³−8%
397	TomeMiyagi, Japan	41	36	−0.9 µg/m³−12%
398	SusonoShizuoka, Japan	48	43	−0.9 µg/m³−10%
399	ŌsakiMiyagi, Japan	48	43	−0.9 µg/m³−10%
400	MatsueShimane, Japan	48	43	−0.9 µg/m³−10%
401	HiwasauraTokushima, Japan	56	54	−0.9 µg/m³−8%
402	NahaOkinawa, Japan	47	42	−0.8 µg/m³−10%
403	NaganoJapan	47	42	−0.8 µg/m³−10%
404	HigashimatsushimaMiyagi, Japan	49	44	−0.8 µg/m³−9%
405	IchiharaChiba, Japan	49	44	−0.8 µg/m³−9%
406	UnnanShimane, Japan	50	46	−0.8 µg/m³−9%
407	HirosakiAomori, Japan	50	46	−0.8 µg/m³−9%
408	NakamuraKochi, Japan	51	47	−0.8 µg/m³−9%
409	KazoSaitama, Japan	52	48	−0.8 µg/m³−8%
410	TsushimaNagasaki, Japan	52	51	−0.8 µg/m³−8%
411	HashimotoWakayama, Japan	52	51	−0.8 µg/m³−8%
412	KitakyushuFukuoka, Japan	54	53	−0.8 µg/m³−7%
413	HyūgaMiyazaki, Japan	55	54	−0.8 µg/m³−7%
414	OnodaYamaguchi, Japan	56	55	−0.8 µg/m³−7%
415	ChikugoFukuoka, Japan	57	56	−0.8 µg/m³−6%
416	MakiNiigata, Japan	43	38	−0.8 µg/m³−10%
417	SendaiMiyagi, Japan	44	40	−0.8 µg/m³−10%
418	MatsushimaMiyagi, Japan	47	43	−0.8 µg/m³−9%
419	NagaokaNiigata, Japan	48	43	−0.8 µg/m³−9%
420	ShironeNiigata, Japan	46	41	−0.8 µg/m³−10%
421	AkitaJapan	51	47	−0.8 µg/m³−9%
422	ChichibuSaitama, Japan	51	47	−0.8 µg/m³−9%
423	KurihamaKanagawa, Japan	51	47	−0.8 µg/m³−9%
424	TsuruokaYamagata, Japan	52	49	−0.8 µg/m³−8%
425	UbeYamaguchi, Japan	53	51	−0.8 µg/m³−8%
426	ShintomiMiyazaki, Japan	51	48	−0.7 µg/m³−8%
427	MiyazakiJapan	52	48	−0.7 µg/m³−7%
428	ShibataNiigata, Japan	53	52	−0.7 µg/m³−7%
429	TagawaFukuoka, Japan	53	52	−0.7 µg/m³−7%
430	TakanabeMiyazaki, Japan	54	53	−0.7 µg/m³−6%
431	KogaIbaraki, Japan	39	35	−0.7 µg/m³−10%
432	KawasakiMiyagi, Japan	42	38	−0.7 µg/m³−9%
433	NiigataJapan	47	43	−0.7 µg/m³−8%
434	SōsaChiba, Japan	46	42	−0.7 µg/m³−9%
435	ShimadaShizuoka, Japan	46	42	−0.7 µg/m³−9%
436	MatsutōIshikawa, Japan	51	47	−0.7 µg/m³−8%
437	Natori-shiMiyagi, Japan	51	47	−0.7 µg/m³−8%
438	TosuSaga, Japan	52	49	−0.7 µg/m³−7%
439	MinawaKanagawa, Japan	54	52	−0.7 µg/m³−7%
440	IzumoShimane, Japan	51	48	−0.6 µg/m³−6%
441	ŌshūIwate, Japan	36	32	−0.6 µg/m³−9%
442	NonoichiIshikawa, Japan	40	37	−0.6 µg/m³−8%
443	Kameda-honchōNiigata, Japan	46	43	−0.6 µg/m³−7%
444	KushiroHokkaido, Japan	34	31	−0.6 µg/m³−10%
445	Minami-SōmaFukushima, Japan	46	42	−0.6 µg/m³−7%
446	SadoNiigata, Japan	47	44	−0.6 µg/m³−7%
447	Tagajō-shiMiyagi, Japan	47	44	−0.6 µg/m³−7%
448	ObitaNagasaki, Japan	48	45	−0.6 µg/m³−7%
449	ShinjōYamagata, Japan	49	46	−0.6 µg/m³−7%
450	SeirōNiigata, Japan	49	46	−0.6 µg/m³−7%
451	YurihonjōAkita, Japan	52	50	−0.6 µg/m³−6%
452	ShiroishiMiyagi, Japan	52	50	−0.6 µg/m³−6%
453	NichinanMiyazaki, Japan	52	50	−0.6 µg/m³−6%
454	ItoshimaFukuoka, Japan	52	51	−0.6 µg/m³−6%
455	TakaokaToyama, Japan	53	52	−0.6 µg/m³−6%
456	Kanzakimachi-kanzakiSaga, Japan	53	52	−0.6 µg/m³−6%
457	Shimo-tsumaIbaraki, Japan	53	52	−0.6 µg/m³−6%
458	Ōyanomachi-noboritateKumamoto, Japan	54	53	−0.6 µg/m³−6%
459	AraoKumamoto, Japan	54	53	−0.6 µg/m³−6%
460	Maebaru-chūōFukuoka, Japan	55	54	−0.6 µg/m³−5%
461	KamaishiIwate, Japan	36	33	−0.5 µg/m³−8%
462	TōmaHokkaido, Japan	38	36	−0.5 µg/m³−7%
463	WakuyaMiyagi, Japan	42	39	−0.5 µg/m³−7%
464	OyabeToyama, Japan	43	40	−0.5 µg/m³−6%
465	AnamizuIshikawa, Japan	44	41	−0.5 µg/m³−6%
466	KanazawaIshikawa, Japan	45	42	−0.5 µg/m³−6%
467	KushikinoKagoshima, Japan	49	47	−0.5 µg/m³−6%
468	ShonaiYamagata, Japan	51	48	−0.5 µg/m³−5%
469	HokotaIbaraki, Japan	51	48	−0.5 µg/m³−5%
470	IzumiKagoshima, Japan	51	48	−0.5 µg/m³−5%
471	ŌmuraNagasaki, Japan	51	48	−0.5 µg/m³−5%
472	ShingūWakayama, Japan	51	49	−0.5 µg/m³−5%
473	KagoshimaJapan	52	49	−0.5 µg/m³−5%
474	WakasugiFukuoka, Japan	52	51	−0.5 µg/m³−5%
475	KanoyaKagoshima, Japan	52	51	−0.5 µg/m³−5%
476	SaikaiNagasaki, Japan	46	43	−0.5 µg/m³−6%
477	HachinoheAomori, Japan	47	45	−0.4 µg/m³−5%
478	NakamaFukuoka, Japan	52	50	−0.4 µg/m³−4%
479	ŌtaGunma, Japan	52	51	−0.4 µg/m³−4%
480	JōetsuNiigata, Japan	53	52	−0.4 µg/m³−4%
481	HigashigōSaga, Japan	54	53	−0.4 µg/m³−4%
482	HanamakiIwate, Japan	39	37	−0.4 µg/m³−6%
483	IchinosekiIwate, Japan	42	40	−0.4 µg/m³−5%
484	KesennumaMiyagi, Japan	46	43	−0.4 µg/m³−5%
485	IwashitaKumamoto, Japan	52	51	−0.4 µg/m³−4%
486	MifuneKumamoto, Japan	52	51	−0.4 µg/m³−4%
487	TomakomaiHokkaido, Japan	36	34	−0.3 µg/m³−5%
488	KakudaMiyagi, Japan	47	45	−0.3 µg/m³−4%
489	SakamotoMiyagi, Japan	47	45	−0.3 µg/m³−4%
490	SukayamaChiba, Japan	52	52	−0.3 µg/m³−3%
491	SusakiKochi, Japan	52	52	−0.3 µg/m³−3%
492	TokonameAichi, Japan	52	52	−0.3 µg/m³−3%
493	IizukaFukuoka, Japan	53	52	−0.3 µg/m³−3%
494	AsahikawaHokkaido, Japan	42	40	−0.3 µg/m³−4%
495	YoshiokaMiyagi, Japan	48	46	−0.3 µg/m³−3%
496	MoriokaIwate, Japan	48	47	−0.3 µg/m³−3%
497	TogitsuNagasaki, Japan	52	52	−0.3 µg/m³−3%
498	Hondomachi-hondoKumamoto, Japan	54	53	−0.3 µg/m³−3%
499	TomiokaKumamoto, Japan	54	53	−0.3 µg/m³−3%
500	HimimachiToyama, Japan	52	52	−0.2 µg/m³−2%
501	KujiIwate, Japan	36	35	−0.2 µg/m³−3%
502	TakizawaIwate, Japan	37	36	−0.2 µg/m³−3%
503	IkiNagasaki, Japan	44	43	−0.2 µg/m³−3%
504	YokoteAkita, Japan	44	43	−0.2 µg/m³−3%
505	ShinshiroAichi, Japan	44	43	−0.2 µg/m³−3%
506	YanagawaFukuoka, Japan	45	44	−0.2 µg/m³−2%
507	FurukawamenNagasaki, Japan	46	44	−0.2 µg/m³−2%
508	MinamikyushuKagoshima, Japan	47	46	−0.2 µg/m³−2%
509	IsahayaNagasaki, Japan	47	46	−0.2 µg/m³−2%
510	MorouraSaga, Japan	48	47	−0.2 µg/m³−2%
511	OgōriFukuoka, Japan	52	51	−0.2 µg/m³−2%
512	HachiōjiTokyo, Japan	52	51	−0.2 µg/m³−2%
513	NōgataFukuoka, Japan	52	51	−0.2 µg/m³−2%
514	NobeokaMiyazaki, Japan	53	52	−0.2 µg/m³−2%
515	IwataShizuoka, Japan	48	48	−0.1 µg/m³−1%
516	TsubataIshikawa, Japan	50	49	−0.1 µg/m³−1%
517	Fukui-shiFukui, Japan	52	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.

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.