SmogRank / Cleaner or dirtier / Japan

Japan: cleaner or dirtier, 2025

In Japan, 546 cities have enough days in both years to compare 2025 with the same days of 2024: 510 got dirtier and 32 cleaner.

The 510 cities that got dirtier, biggest rise first

#	City	2024	2025	Change
1	OnomichiHiroshima, Japan	47	60	+5.2 µg/m³+61%
2	Shin’ichiHiroshima, Japan	46	59	+5.0 µg/m³+60%
3	TakamatsuKagawa, Japan	44	56	+3.8 µg/m³+48%
4	KariyaAichi, Japan	42	55	+3.5 µg/m³+46%
5	AnanTokushima, Japan	52	58	+3.3 µg/m³+35%
6	HigashinozoeHyōgo, Japan	51	57	+3.2 µg/m³+35%
7	YaeHiroshima, Japan	38	52	+3.1 µg/m³+46%
8	BeppuOita, Japan	51	57	+3.0 µg/m³+32%
9	SekimachiGifu, Japan	46	55	+3.0 µg/m³+37%
10	ShingūWakayama, Japan	31	47	+2.9 µg/m³+53%
11	ShidoKagawa, Japan	49	56	+2.9 µg/m³+33%
12	IbiGifu, Japan	30	46	+2.8 µg/m³+52%
13	AridaWakayama, Japan	44	54	+2.7 µg/m³+34%
14	Kamojimachō-jōgejimaTokushima, Japan	46	54	+2.6 µg/m³+32%
15	TamanoOkayama, Japan	53	58	+2.6 µg/m³+26%
16	OnoHyōgo, Japan	48	55	+2.5 µg/m³+29%
17	ŌgakiGifu, Japan	47	54	+2.5 µg/m³+30%
18	NishioAichi, Japan	44	54	+2.5 µg/m³+31%
19	TsubataIshikawa, Japan	32	46	+2.5 µg/m³+44%
20	KurashikiOkayama, Japan	54	58	+2.4 µg/m³+23%
21	HigashihiroshimaHiroshima, Japan	52	56	+2.4 µg/m³+25%
22	HigashiosakaOsaka, Japan	50	55	+2.4 µg/m³+27%
23	TsuyamaOkayama, Japan	49	55	+2.4 µg/m³+27%
24	KosaiShizuoka, Japan	41	52	+2.4 µg/m³+33%
25	Ueno-ebisumachiMie, Japan	40	52	+2.4 µg/m³+33%
26	YoukaichiShiga, Japan	47	54	+2.3 µg/m³+27%
27	HiwasauraTokushima, Japan	47	54	+2.3 µg/m³+27%
28	HiroshimaJapan	46	54	+2.3 µg/m³+28%
29	SabaeFukui, Japan	39	51	+2.3 µg/m³+33%
30	MaizuruKyoto, Japan	39	51	+2.3 µg/m³+33%
31	ImabariEhime, Japan	52	57	+2.3 µg/m³+23%
32	Kakogawachō-honmachiHyōgo, Japan	51	56	+2.3 µg/m³+25%
33	ShimogamoOkayama, Japan	51	55	+2.2 µg/m³+24%
34	InabeMie, Japan	42	52	+2.2 µg/m³+29%
35	YawatahamaEhime, Japan	43	52	+2.2 µg/m³+29%
36	BizenOkayama, Japan	54	58	+2.2 µg/m³+20%
37	FukuyamaHiroshima, Japan	53	58	+2.2 µg/m³+21%
38	OnodaYamaguchi, Japan	51	55	+2.2 µg/m³+24%
39	TakahashiOkayama, Japan	49	55	+2.2 µg/m³+25%
40	KōtariKyoto, Japan	47	54	+2.2 µg/m³+26%
41	JōyōKyoto, Japan	44	53	+2.2 µg/m³+28%
42	HiragiKagawa, Japan	48	54	+2.1 µg/m³+24%
43	KainanWakayama, Japan	46	53	+2.1 µg/m³+26%
44	ToyookaHyōgo, Japan	41	52	+2.1 µg/m³+29%
45	GobōWakayama, Japan	40	51	+2.1 µg/m³+29%
46	ShinagawaEhime, Japan	35	47	+2.1 µg/m³+33%
47	KumaEhime, Japan	35	47	+2.1 µg/m³+33%
48	AsakuchiOkayama, Japan	52	56	+2.1 µg/m³+21%
49	OkayamaJapan	51	55	+2.1 µg/m³+23%
50	AkashiHyōgo, Japan	49	55	+2.1 µg/m³+24%
51	IkarugaHyōgo, Japan	46	53	+2.1 µg/m³+25%
52	UwajimaEhime, Japan	39	51	+2.1 µg/m³+30%
53	TanabeWakayama, Japan	38	50	+2.1 µg/m³+30%
54	NishiwakiHyōgo, Japan	36	48	+2.1 µg/m³+32%
55	TobaMie, Japan	38	49	+2.0 µg/m³+29%
56	NiimiOkayama, Japan	38	49	+2.0 µg/m³+29%
57	HayashimaOkayama, Japan	54	58	+2.0 µg/m³+19%
58	MimaTokushima, Japan	53	56	+2.0 µg/m³+20%
59	HitoyoshiKumamoto, Japan	49	54	+2.0 µg/m³+23%
60	AyabeKyoto, Japan	45	53	+2.0 µg/m³+25%
61	KitahamaShiga, Japan	41	52	+2.0 µg/m³+27%
62	IkedachōTokushima, Japan	52	56	+1.9 µg/m³+19%
63	Tottori-shiTottori, Japan	48	54	+1.9 µg/m³+22%
64	OsakaJapan	48	54	+1.9 µg/m³+22%
65	MatsusakaMie, Japan	48	54	+1.9 µg/m³+22%
66	Kashihara-shiNara, Japan	48	54	+1.9 µg/m³+22%
67	IgaMie, Japan	47	53	+1.9 µg/m³+23%
68	HimejiHyōgo, Japan	46	53	+1.9 µg/m³+23%
69	KameokaKyoto, Japan	44	52	+1.9 µg/m³+24%
70	ShimaMie, Japan	36	47	+1.9 µg/m³+29%
71	YonoOsaka, Japan	36	47	+1.9 µg/m³+29%
72	SakuraChiba, Japan	43	52	+1.9 µg/m³+24%
73	HirakataOsaka, Japan	43	52	+1.9 µg/m³+25%
74	AsoKumamoto, Japan	41	51	+1.9 µg/m³+26%
75	ŌmihachimanShiga, Japan	40	51	+1.9 µg/m³+26%
76	YawataKyoto, Japan	52	55	+1.8 µg/m³+19%
77	Narutochō-mitsuishiTokushima, Japan	50	54	+1.8 µg/m³+20%
78	TatsunoHyōgo, Japan	50	54	+1.8 µg/m³+20%
79	NantanKyoto, Japan	48	54	+1.8 µg/m³+21%
80	IkomaNara, Japan	46	53	+1.8 µg/m³+22%
81	TakarazukaHyōgo, Japan	44	52	+1.8 µg/m³+23%
82	KuwanaMie, Japan	44	52	+1.8 µg/m³+23%
83	KawaguchiTokushima, Japan	42	52	+1.8 µg/m³+24%
84	SumotoHyōgo, Japan	31	41	+1.8 µg/m³+32%
85	HabikinoOsaka, Japan	43	52	+1.8 µg/m³+23%
86	KōkaShiga, Japan	35	45	+1.8 µg/m³+29%
87	TenriNara, Japan	49	54	+1.8 µg/m³+20%
88	NishinomiyaHyōgo, Japan	47	53	+1.8 µg/m³+21%
89	HashimaGifu, Japan	47	53	+1.8 µg/m³+21%
90	KizugawaKyoto, Japan	44	52	+1.8 µg/m³+23%
91	UjiKyoto, Japan	46	52	+1.7 µg/m³+21%
92	FukuroiShizuoka, Japan	45	52	+1.7 µg/m³+21%
93	TondabayashichōOsaka, Japan	42	51	+1.7 µg/m³+22%
94	KakegawaShizuoka, Japan	42	51	+1.7 µg/m³+22%
95	MiyoshiHiroshima, Japan	39	49	+1.7 µg/m³+24%
96	IzumiOsaka, Japan	43	52	+1.7 µg/m³+22%
97	YurihonjōAkita, Japan	38	47	+1.7 µg/m³+25%
98	SakaiminatoTottori, Japan	37	47	+1.7 µg/m³+25%
99	TsuchiuraIbaraki, Japan	54	58	+1.7 µg/m³+16%
100	KashiwaraNara, Japan	50	54	+1.7 µg/m³+19%
101	TakinomiyaKagawa, Japan	44	52	+1.7 µg/m³+21%
102	IseMie, Japan	44	52	+1.7 µg/m³+22%
103	YonagoTottori, Japan	42	51	+1.7 µg/m³+23%
104	NakamuraKochi, Japan	42	51	+1.7 µg/m³+23%
105	SennanOsaka, Japan	42	51	+1.7 µg/m³+23%
106	KumanoMie, Japan	41	51	+1.7 µg/m³+23%
107	KikugawaShizuoka, Japan	38	48	+1.7 µg/m³+25%
108	KumagawaFukui, Japan	36	45	+1.7 µg/m³+27%
109	ŌtsukiYamanashi, Japan	55	58	+1.6 µg/m³+14%
110	MarugameKagawa, Japan	53	56	+1.6 µg/m³+16%
111	ItoigawaNiigata, Japan	48	53	+1.6 µg/m³+18%
112	NagahamaShiga, Japan	46	52	+1.6 µg/m³+20%
113	Kawachi-NaganoOsaka, Japan	46	52	+1.6 µg/m³+20%
114	OnoFukui, Japan	37	46	+1.6 µg/m³+24%
115	AmagasakiHyōgo, Japan	52	55	+1.6 µg/m³+17%
116	KureHiroshima, Japan	52	55	+1.6 µg/m³+17%
117	HōryūjiNara, Japan	51	54	+1.6 µg/m³+18%
118	NabariMie, Japan	49	54	+1.6 µg/m³+18%
119	SugaiKyoto, Japan	49	54	+1.6 µg/m³+18%
120	KishiwadaOsaka, Japan	48	53	+1.6 µg/m³+19%
121	TsuMie, Japan	47	53	+1.6 µg/m³+19%
122	KyotoJapan	47	53	+1.6 µg/m³+19%
123	TomiokaGunma, Japan	47	53	+1.6 µg/m³+19%
124	SaikūMie, Japan	47	53	+1.6 µg/m³+19%
125	NyūzenToyama, Japan	47	53	+1.6 µg/m³+19%
126	GionHiroshima, Japan	45	52	+1.6 µg/m³+20%
127	Fukui-shiFukui, Japan	44	52	+1.6 µg/m³+20%
128	KirishimaKagoshima, Japan	44	52	+1.6 µg/m³+20%
129	TokushimaJapan	44	52	+1.6 µg/m³+20%
130	OwaseMie, Japan	44	52	+1.6 µg/m³+20%
131	ŌtsuShiga, Japan	42	51	+1.6 µg/m³+21%
132	KanbaraShizuoka, Japan	42	51	+1.6 µg/m³+21%
133	EbinaKanagawa, Japan	42	51	+1.6 µg/m³+21%
134	KamisuIbaraki, Japan	51	54	+1.5 µg/m³+16%
135	ŌtakeHiroshima, Japan	50	54	+1.5 µg/m³+17%
136	OkazakiAichi, Japan	49	53	+1.5 µg/m³+17%
137	IwakuniYamaguchi, Japan	49	53	+1.5 µg/m³+17%
138	SakaiOsaka, Japan	48	53	+1.5 µg/m³+17%
139	MiharaHiroshima, Japan	48	53	+1.5 µg/m³+17%
140	TōkaiAichi, Japan	48	53	+1.5 µg/m³+17%
141	KusatsuShiga, Japan	47	52	+1.5 µg/m³+18%
142	YaoOsaka, Japan	46	52	+1.5 µg/m³+18%
143	KobeHyōgo, Japan	46	52	+1.5 µg/m³+18%
144	BuzenFukuoka, Japan	46	52	+1.5 µg/m³+18%
145	TokonameAichi, Japan	45	52	+1.5 µg/m³+19%
146	YoshinogawaTokushima, Japan	45	52	+1.5 µg/m³+19%
147	MizuhoGifu, Japan	42	51	+1.5 µg/m³+20%
148	InoKochi, Japan	41	49	+1.5 µg/m³+20%
149	GamagōriAichi, Japan	41	49	+1.5 µg/m³+20%
150	NankokuKochi, Japan	38	47	+1.5 µg/m³+22%
151	HamakitaShizuoka, Japan	36	44	+1.5 µg/m³+23%
152	ToyonakaOsaka, Japan	43	51	+1.5 µg/m³+19%
153	KaminomaAichi, Japan	43	51	+1.5 µg/m³+19%
154	TaharaAichi, Japan	53	55	+1.4 µg/m³+14%
155	OwariasahiAichi, Japan	53	55	+1.4 µg/m³+14%
156	YokkaichiMie, Japan	52	55	+1.4 µg/m³+15%
157	NakaIbaraki, Japan	51	54	+1.4 µg/m³+15%
158	SuzukaMie, Japan	51	54	+1.4 µg/m³+15%
159	KameyamaMie, Japan	49	53	+1.4 µg/m³+16%
160	ShūnanYamaguchi, Japan	48	53	+1.4 µg/m³+16%
161	TakeharaHiroshima, Japan	48	53	+1.4 µg/m³+16%
162	KobayashiMiyazaki, Japan	46	52	+1.4 µg/m³+17%
163	ImizuToyama, Japan	45	52	+1.4 µg/m³+17%
164	YanaiYamaguchi, Japan	44	51	+1.4 µg/m³+18%
165	OdawaraKanagawa, Japan	42	50	+1.4 µg/m³+18%
166	SayamaOsaka, Japan	42	49	+1.4 µg/m³+19%
167	AtamiShizuoka, Japan	41	49	+1.4 µg/m³+19%
168	TonoshōKagawa, Japan	39	47	+1.4 µg/m³+20%
169	HamadaShimane, Japan	39	47	+1.4 µg/m³+20%
170	ShizuokaJapan	38	46	+1.4 µg/m³+20%
171	HagiYamaguchi, Japan	37	44	+1.4 µg/m³+21%
172	InaNagano, Japan	33	41	+1.4 µg/m³+23%
173	YamaguchiJapan	43	51	+1.4 µg/m³+18%
174	InashikiIbaraki, Japan	43	51	+1.4 µg/m³+18%
175	KyōtangoKyoto, Japan	38	46	+1.4 µg/m³+21%
176	ShimadaShizuoka, Japan	36	43	+1.4 µg/m³+22%
177	IzunokuniShizuoka, Japan	36	43	+1.4 µg/m³+22%
178	SandachōHyōgo, Japan	52	55	+1.4 µg/m³+14%
179	KaniGifu, Japan	51	54	+1.4 µg/m³+15%
180	SōjaOkayama, Japan	53	55	+1.3 µg/m³+13%
181	HyūgaMiyazaki, Japan	52	55	+1.3 µg/m³+13%
182	ShibukawaGunma, Japan	48	53	+1.3 µg/m³+15%
183	HikariYamaguchi, Japan	48	53	+1.3 µg/m³+15%
184	MinawaKanagawa, Japan	48	53	+1.3 µg/m³+15%
185	TakashimaShiga, Japan	48	52	+1.3 µg/m³+15%
186	ŌtaGunma, Japan	47	52	+1.3 µg/m³+15%
187	NagoyaAichi, Japan	47	52	+1.3 µg/m³+15%
188	KoshigayaSaitama, Japan	47	52	+1.3 µg/m³+15%
189	NagatoYamaguchi, Japan	45	52	+1.3 µg/m³+16%
190	KinokawaWakayama, Japan	45	52	+1.3 µg/m³+16%
191	AnjōAichi, Japan	44	51	+1.3 µg/m³+16%
192	ToyohashiAichi, Japan	42	49	+1.3 µg/m³+17%
193	HachiōjiTokyo, Japan	42	49	+1.3 µg/m³+17%
194	MasudaShimane, Japan	42	49	+1.3 µg/m³+17%
195	TsurugaFukui, Japan	39	47	+1.3 µg/m³+18%
196	ShimodaShizuoka, Japan	39	47	+1.3 µg/m³+18%
197	InuyamaAichi, Japan	39	47	+1.3 µg/m³+18%
198	TonamiToyama, Japan	39	46	+1.3 µg/m³+19%
199	NumazuShizuoka, Japan	43	50	+1.3 µg/m³+17%
200	HadanoKanagawa, Japan	43	50	+1.3 µg/m³+17%
201	IchiharaChiba, Japan	43	50	+1.3 µg/m³+17%
202	ŌyauchiFukushima, Japan	36	43	+1.3 µg/m³+20%
203	ZentsujichóKagawa, Japan	52	55	+1.3 µg/m³+13%
204	FukuchiyamaKyoto, Japan	46	52	+1.3 µg/m³+16%
205	AmaAichi, Japan	46	52	+1.3 µg/m³+16%
206	ToyotaAichi, Japan	44	51	+1.3 µg/m³+16%
207	SuzakaNagano, Japan	44	51	+1.3 µg/m³+16%
208	ObuseNagano, Japan	44	51	+1.3 µg/m³+16%
209	NodaChiba, Japan	51	53	+1.2 µg/m³+13%
210	SusakiKochi, Japan	45	51	+1.2 µg/m³+15%
211	IchinomiyaAichi, Japan	45	51	+1.2 µg/m³+15%
212	TakaokaToyama, Japan	43	50	+1.2 µg/m³+15%
213	SawaraChiba, Japan	43	49	+1.2 µg/m³+16%
214	KōzakiChiba, Japan	43	49	+1.2 µg/m³+16%
215	HamamatsuShizuoka, Japan	41	47	+1.2 µg/m³+16%
216	OgaAkita, Japan	41	47	+1.2 µg/m³+16%
217	MotonaChiba, Japan	41	47	+1.2 µg/m³+16%
218	MinamibōsōChiba, Japan	41	47	+1.2 µg/m³+16%
219	NagadomiChiba, Japan	38	44	+1.2 µg/m³+18%
220	KatsuuraChiba, Japan	34	41	+1.2 µg/m³+19%
221	MizunashiFukushima, Japan	32	38	+1.2 µg/m³+21%
222	NakatsuOita, Japan	56	58	+1.2 µg/m³+10%
223	IshinomakiMiyagi, Japan	52	55	+1.2 µg/m³+12%
224	ŌitaOita, Japan	52	54	+1.2 µg/m³+13%
225	IwadeWakayama, Japan	52	54	+1.2 µg/m³+13%
226	KashiwaChiba, Japan	47	52	+1.2 µg/m³+14%
227	UbeYamaguchi, Japan	46	52	+1.2 µg/m³+14%
228	YachimataChiba, Japan	46	52	+1.2 µg/m³+14%
229	MineYamaguchi, Japan	46	52	+1.2 µg/m³+14%
230	MitaiMiyazaki, Japan	44	51	+1.2 µg/m³+15%
231	MiyazuKyoto, Japan	44	51	+1.2 µg/m³+15%
232	HashimotoWakayama, Japan	44	51	+1.2 µg/m³+15%
233	SetoAichi, Japan	42	48	+1.2 µg/m³+16%
234	TateyamaChiba, Japan	38	45	+1.2 µg/m³+17%
235	TakayamaGifu, Japan	38	45	+1.2 µg/m³+17%
236	Shimo-tsumaIbaraki, Japan	52	54	+1.1 µg/m³+11%
237	Ōdachō-ōdaShimane, Japan	43	49	+1.1 µg/m³+14%
238	AjikiChiba, Japan	43	49	+1.1 µg/m³+14%
239	ToyamaJapan	43	49	+1.1 µg/m³+14%
240	IwataShizuoka, Japan	41	47	+1.1 µg/m³+15%
241	GōtsuchōShimane, Japan	41	47	+1.1 µg/m³+15%
242	MatsueShimane, Japan	40	46	+1.1 µg/m³+15%
243	KomatsuIshikawa, Japan	38	44	+1.1 µg/m³+16%
244	FujiyoshidaYamanashi, Japan	38	44	+1.1 µg/m³+16%
245	WakuyaMiyagi, Japan	32	38	+1.1 µg/m³+19%
246	TakanabeMiyazaki, Japan	52	54	+1.1 µg/m³+11%
247	AgeoSaitama, Japan	52	54	+1.1 µg/m³+11%
248	ShimonosekiYamaguchi, Japan	51	53	+1.1 µg/m³+12%
249	HandaAichi, Japan	49	52	+1.1 µg/m³+12%
250	GifuJapan	49	52	+1.1 µg/m³+12%
251	HōfuYamaguchi, Japan	48	52	+1.1 µg/m³+13%
252	IwakiFukushima, Japan	47	52	+1.1 µg/m³+13%
253	IshiokaIbaraki, Japan	47	52	+1.1 µg/m³+13%
254	YotsukaidōChiba, Japan	46	52	+1.1 µg/m³+13%
255	AzaminoKanagawa, Japan	46	52	+1.1 µg/m³+13%
256	IzumisanoOsaka, Japan	45	51	+1.1 µg/m³+14%
257	KimitsuChiba, Japan	45	51	+1.1 µg/m³+14%
258	TorideIbaraki, Japan	45	51	+1.1 µg/m³+14%
259	HokotaIbaraki, Japan	45	51	+1.1 µg/m³+14%
260	InzaiChiba, Japan	45	51	+1.1 µg/m³+14%
261	KisarazuChiba, Japan	44	50	+1.1 µg/m³+14%
262	NaritaChiba, Japan	44	50	+1.1 µg/m³+14%
263	AkishimaTokyo, Japan	44	50	+1.1 µg/m³+14%
264	UnnanShimane, Japan	42	48	+1.1 µg/m³+14%
265	MobaraChiba, Japan	42	48	+1.1 µg/m³+15%
266	AkiKochi, Japan	41	47	+1.1 µg/m³+15%
267	SakuNagano, Japan	39	46	+1.1 µg/m³+15%
268	HekinanAichi, Japan	39	45	+1.1 µg/m³+16%
269	NaganoJapan	38	44	+1.1 µg/m³+16%
270	MinamiuonumaNiigata, Japan	38	44	+1.1 µg/m³+16%
271	UedaNagano, Japan	37	43	+1.1 µg/m³+16%
272	KanazawaIshikawa, Japan	34	41	+1.1 µg/m³+18%
273	HakuiIshikawa, Japan	41	46	+1.0 µg/m³+14%
274	HirosakiAomori, Japan	41	46	+1.0 µg/m³+14%
275	Hitachi-NakaIbaraki, Japan	41	46	+1.0 µg/m³+14%
276	MatsuyamaEhime, Japan	53	55	+1.0 µg/m³+10%
277	NiizaSaitama, Japan	52	53	+1.0 µg/m³+11%
278	UozuToyama, Japan	51	53	+1.0 µg/m³+11%
279	OgōriFukuoka, Japan	50	53	+1.0 µg/m³+11%
280	HanyūSaitama, Japan	49	52	+1.0 µg/m³+11%
281	YukuhashiFukuoka, Japan	49	52	+1.0 µg/m³+11%
282	ChibaJapan	48	52	+1.0 µg/m³+12%
283	MiyazakiJapan	46	51	+1.0 µg/m³+12%
284	MikuniFukui, Japan	46	51	+1.0 µg/m³+12%
285	FuchūTokyo, Japan	46	51	+1.0 µg/m³+12%
286	KamakuraKanagawa, Japan	45	51	+1.0 µg/m³+12%
287	FujinomiyaShizuoka, Japan	45	51	+1.0 µg/m³+12%
288	YamatoKanagawa, Japan	45	51	+1.0 µg/m³+12%
289	ShiroishiMiyagi, Japan	44	49	+1.0 µg/m³+13%
290	HigashimatsushimaMiyagi, Japan	42	47	+1.0 µg/m³+13%
291	NisshinAichi, Japan	42	47	+1.0 µg/m³+13%
292	MatsumotoNagano, Japan	41	47	+1.0 µg/m³+14%
293	FujiedaShizuoka, Japan	39	45	+1.0 µg/m³+14%
294	SodegauraChiba, Japan	39	45	+1.0 µg/m³+14%
295	ShirakawaFukushima, Japan	38	44	+1.0 µg/m³+14%
296	KaizuGifu, Japan	38	43	+1.0 µg/m³+15%
297	KitaibarakiIbaraki, Japan	35	41	+1.0 µg/m³+16%
298	ShinshiroAichi, Japan	34	39	+1.0 µg/m³+16%
299	Minami-AlpsYamanashi, Japan	43	48	+1.0 µg/m³+13%
300	NiihamaEhime, Japan	55	57	+0.9 µg/m³+8%
301	GyōdaSaitama, Japan	54	56	+0.9 µg/m³+8%
302	IyoEhime, Japan	52	54	+0.9 µg/m³+9%
303	SōkaSaitama, Japan	52	53	+0.9 µg/m³+10%
304	TokyoJapan	51	53	+0.9 µg/m³+10%
305	SakadoSaitama, Japan	51	53	+0.9 µg/m³+10%
306	IizukaFukuoka, Japan	50	52	+0.9 µg/m³+10%
307	SagaeYamagata, Japan	48	52	+0.9 µg/m³+10%
308	BandōIbaraki, Japan	48	52	+0.9 µg/m³+10%
309	TokorozawaSaitama, Japan	48	52	+0.9 µg/m³+10%
310	HiratsukaKanagawa, Japan	47	52	+0.9 µg/m³+11%
311	KodairaTokyo, Japan	47	52	+0.9 µg/m³+11%
312	KawagoeSaitama, Japan	46	51	+0.9 µg/m³+11%
313	HimimachiToyama, Japan	46	51	+0.9 µg/m³+11%
314	ShintomiMiyazaki, Japan	45	50	+0.9 µg/m³+11%
315	IzumoShimane, Japan	44	49	+0.9 µg/m³+11%
316	FujisawaKanagawa, Japan	44	49	+0.9 µg/m³+11%
317	FujiShizuoka, Japan	44	49	+0.9 µg/m³+11%
318	Kashima-shiIbaraki, Japan	42	47	+0.9 µg/m³+12%
319	KasamaIbaraki, Japan	42	47	+0.9 µg/m³+12%
320	ŌharaChiba, Japan	39	44	+0.9 µg/m³+13%
321	MatsushimaMiyagi, Japan	39	44	+0.9 µg/m³+13%
322	IchinomiyaChiba, Japan	39	44	+0.9 µg/m³+13%
323	IidaNagano, Japan	43	48	+0.9 µg/m³+12%
324	YokoshibaChiba, Japan	41	46	+0.9 µg/m³+12%
325	NumataGunma, Japan	40	45	+0.9 µg/m³+12%
326	MatsutōIshikawa, Japan	40	45	+0.9 µg/m³+12%
327	TōganeChiba, Japan	38	43	+0.9 µg/m³+13%
328	Aizu-WakamatsuFukushima, Japan	37	42	+0.9 µg/m³+13%
329	HitachiIbaraki, Japan	36	41	+0.9 µg/m³+14%
330	TomeMiyagi, Japan	34	39	+0.9 µg/m³+15%
331	NonoichiIshikawa, Japan	32	37	+0.9 µg/m³+16%
332	TokiGifu, Japan	52	54	+0.9 µg/m³+9%
333	UrayasuChiba, Japan	46	51	+0.9 µg/m³+11%
334	ObamaFukui, Japan	46	51	+0.9 µg/m³+11%
335	Kan’onjichōKagawa, Japan	55	56	+0.8 µg/m³+7%
336	KandaFukuoka, Japan	52	53	+0.8 µg/m³+8%
337	AsakaSaitama, Japan	52	53	+0.8 µg/m³+8%
338	KawaguchiSaitama, Japan	51	53	+0.8 µg/m³+9%
339	JōsōIbaraki, Japan	51	52	+0.8 µg/m³+9%
340	SaitamaJapan	50	52	+0.8 µg/m³+9%
341	KamagayaChiba, Japan	50	52	+0.8 µg/m³+9%
342	ShibataNiigata, Japan	48	52	+0.8 µg/m³+9%
343	KudamatsuYamaguchi, Japan	48	52	+0.8 µg/m³+9%
344	KasugaFukuoka, Japan	48	52	+0.8 µg/m³+9%
345	MifuneKumamoto, Japan	47	51	+0.8 µg/m³+9%
346	IwashitaKumamoto, Japan	47	51	+0.8 µg/m³+9%
347	TsuruokaYamagata, Japan	46	50	+0.8 µg/m³+10%
348	NarashinoChiba, Japan	46	50	+0.8 µg/m³+10%
349	HonjōSaitama, Japan	44	49	+0.8 µg/m³+10%
350	YaitaTochigi, Japan	42	47	+0.8 µg/m³+11%
351	HigashineYamagata, Japan	42	47	+0.8 µg/m³+11%
352	Tagajō-shiMiyagi, Japan	39	44	+0.8 µg/m³+11%
353	YasugichōShimane, Japan	43	47	+0.8 µg/m³+10%
354	ŌuchiMiyagi, Japan	43	47	+0.8 µg/m³+10%
355	ChikumaNagano, Japan	43	47	+0.8 µg/m³+10%
356	SōsaChiba, Japan	43	47	+0.8 µg/m³+10%
357	SōmaFukushima, Japan	43	47	+0.8 µg/m³+10%
358	KagaIshikawa, Japan	41	45	+0.8 µg/m³+11%
359	MinamichitaAichi, Japan	40	44	+0.8 µg/m³+11%
360	OgawamachiSaitama, Japan	39	43	+0.8 µg/m³+11%
361	HitachiomiyaIbaraki, Japan	38	43	+0.8 µg/m³+12%
362	OyabeToyama, Japan	34	39	+0.8 µg/m³+13%
363	Tanushimarumachi-toyokiFukuoka, Japan	56	58	+0.8 µg/m³+7%
364	KofuYamanashi, Japan	53	55	+0.8 µg/m³+8%
365	SaikiOita, Japan	52	54	+0.8 µg/m³+8%
366	SanoTochigi, Japan	52	53	+0.8 µg/m³+9%
367	Higashi-MatsuyamaSaitama, Japan	51	53	+0.8 µg/m³+9%
368	AtsugiKanagawa, Japan	47	51	+0.8 µg/m³+10%
369	AshikagaTochigi, Japan	47	51	+0.8 µg/m³+10%
370	OmigawaChiba, Japan	41	46	+0.8 µg/m³+11%
371	SaijōEhime, Japan	57	58	+0.7 µg/m³+6%
372	FukuokaJapan	52	53	+0.7 µg/m³+7%
373	ChigasakiKanagawa, Japan	51	52	+0.7 µg/m³+8%
374	HikoneShiga, Japan	48	52	+0.7 µg/m³+8%
375	HigashikurumeTokyo, Japan	48	52	+0.7 µg/m³+8%
376	MatsudoChiba, Japan	46	49	+0.7 µg/m³+9%
377	KurihamaKanagawa, Japan	46	49	+0.7 µg/m³+9%
378	MinamikyushuKagoshima, Japan	46	49	+0.7 µg/m³+9%
379	YonezawaYamagata, Japan	45	49	+0.7 µg/m³+9%
380	NagaokaNiigata, Japan	42	46	+0.7 µg/m³+9%
381	MachidaTokyo, Japan	43	47	+0.7 µg/m³+9%
382	SuwaNagano, Japan	43	47	+0.7 µg/m³+9%
383	HachinoheAomori, Japan	41	44	+0.7 µg/m³+10%
384	MinamiashigaraKanagawa, Japan	39	43	+0.7 µg/m³+10%
385	SendaiMiyagi, Japan	37	41	+0.7 µg/m³+10%
386	OyamaTochigi, Japan	53	54	+0.7 µg/m³+7%
387	KumamotoJapan	53	54	+0.7 µg/m³+7%
388	TagawaFukuoka, Japan	52	54	+0.7 µg/m³+7%
389	MinatoWakayama, Japan	52	54	+0.7 µg/m³+7%
390	KikuchiKumamoto, Japan	52	54	+0.7 µg/m³+7%
391	KōnosuSaitama, Japan	52	53	+0.7 µg/m³+7%
392	YokotaTokyo, Japan	49	52	+0.7 µg/m³+8%
393	KiryūGunma, Japan	49	52	+0.7 µg/m³+8%
394	KasukabeSaitama, Japan	49	52	+0.7 µg/m³+8%
395	ItoshimaFukuoka, Japan	49	52	+0.7 µg/m³+8%
396	WakasugiFukuoka, Japan	47	51	+0.7 µg/m³+8%
397	KogaFukuoka, Japan	47	51	+0.7 µg/m³+8%
398	KanumaTochigi, Japan	44	48	+0.7 µg/m³+9%
399	MookaTochigi, Japan	44	48	+0.7 µg/m³+9%
400	NoboritoKanagawa, Japan	44	48	+0.7 µg/m³+9%
401	ShonaiYamagata, Japan	44	48	+0.7 µg/m³+9%
402	NakanojōGunma, Japan	41	45	+0.7 µg/m³+9%
403	ŌsakiMiyagi, Japan	41	45	+0.7 µg/m³+9%
404	Minami-SōmaFukushima, Japan	38	42	+0.7 µg/m³+10%
405	SeirōNiigata, Japan	43	46	+0.6 µg/m³+8%
406	AkitaJapan	41	44	+0.6 µg/m³+8%
407	NiigataJapan	39	43	+0.6 µg/m³+8%
408	ŌdateAkita, Japan	39	43	+0.6 µg/m³+8%
409	KawasakiMiyagi, Japan	35	38	+0.6 µg/m³+10%
410	ŌshūIwate, Japan	31	34	+0.6 µg/m³+11%
411	KamaishiIwate, Japan	29	33	+0.6 µg/m³+11%
412	MiyakonojōMiyazaki, Japan	54	55	+0.6 µg/m³+6%
413	TamanaKumamoto, Japan	54	55	+0.6 µg/m³+6%
414	TatebayashiGunma, Japan	52	53	+0.6 µg/m³+6%
415	Kanzakimachi-kanzakiSaga, Japan	52	53	+0.6 µg/m³+6%
416	MenumaSaitama, Japan	52	53	+0.6 µg/m³+6%
417	KukichūōSaitama, Japan	51	52	+0.6 µg/m³+6%
418	NōgataFukuoka, Japan	50	52	+0.6 µg/m³+7%
419	NichinanMiyazaki, Japan	49	52	+0.6 µg/m³+7%
420	Sakai-nakajimaGunma, Japan	49	52	+0.6 µg/m³+7%
421	TsushimaNagasaki, Japan	49	52	+0.6 µg/m³+7%
422	BarakiChiba, Japan	49	52	+0.6 µg/m³+7%
423	IzumiKagoshima, Japan	48	51	+0.6 µg/m³+7%
424	KushikinoKagoshima, Japan	47	51	+0.6 µg/m³+7%
425	MunakataFukuoka, Japan	45	48	+0.6 µg/m³+7%
426	Natori-shiMiyagi, Japan	44	47	+0.6 µg/m³+8%
427	HigashimurayamaTokyo, Japan	44	47	+0.6 µg/m³+8%
428	ShironeNiigata, Japan	38	42	+0.6 µg/m³+9%
429	KesennumaMiyagi, Japan	38	42	+0.6 µg/m³+9%
430	MakiNiigata, Japan	36	39	+0.6 µg/m³+9%
431	KogaIbaraki, Japan	36	39	+0.6 µg/m³+9%
432	TakizawaIwate, Japan	33	36	+0.6 µg/m³+10%
433	KōriyamaFukushima, Japan	43	46	+0.5 µg/m³+6%
434	ShikokuchūōEhime, Japan	57	58	+0.5 µg/m³+4%
435	ŌmutaFukuoka, Japan	56	57	+0.5 µg/m³+4%
436	Uekimachi-mōnoKumamoto, Japan	54	55	+0.5 µg/m³+5%
437	HigashigōSaga, Japan	53	54	+0.5 µg/m³+5%
438	KitakyushuFukuoka, Japan	53	54	+0.5 µg/m³+5%
439	YachiyoChiba, Japan	52	53	+0.5 µg/m³+5%
440	SukayamaChiba, Japan	52	52	+0.5 µg/m³+5%
441	SendaiKagoshima, Japan	51	52	+0.5 µg/m³+5%
442	KagoshimaJapan	50	52	+0.5 µg/m³+6%
443	HannōSaitama, Japan	50	52	+0.5 µg/m³+6%
444	TakuSaga, Japan	50	52	+0.5 µg/m³+6%
445	KumagayaSaitama, Japan	49	52	+0.5 µg/m³+6%
446	SayamaSaitama, Japan	49	52	+0.5 µg/m³+6%
447	TakeoSaga, Japan	49	51	+0.5 µg/m³+6%
448	YokohamaKanagawa, Japan	48	51	+0.5 µg/m³+6%
449	UtsunomiyaTochigi, Japan	48	51	+0.5 µg/m³+6%
450	AiharaKanagawa, Japan	47	50	+0.5 µg/m³+6%
451	IwanumaMiyagi, Japan	47	49	+0.5 µg/m³+6%
452	MinanoSaitama, Japan	46	48	+0.5 µg/m³+6%
453	YokosukaKanagawa, Japan	44	47	+0.5 µg/m³+6%
454	MiuraKanagawa, Japan	44	47	+0.5 µg/m³+6%
455	YamagataJapan	42	44	+0.5 µg/m³+7%
456	NasukarasuyamaTochigi, Japan	39	42	+0.5 µg/m³+7%
457	NanaoIshikawa, Japan	37	40	+0.5 µg/m³+7%
458	KuriharaMiyagi, Japan	34	37	+0.5 µg/m³+8%
459	TochigiJapan	43	46	+0.5 µg/m³+6%
460	HonmachiKumamoto, Japan	54	55	+0.4 µg/m³+4%
461	TsurusakiOita, Japan	53	54	+0.4 µg/m³+4%
462	UkihaFukuoka, Japan	53	54	+0.4 µg/m³+4%
463	KogaFukuoka, Japan	52	53	+0.4 µg/m³+4%
464	KanoyaKagoshima, Japan	52	53	+0.4 µg/m³+4%
465	MorohongōSaitama, Japan	51	52	+0.4 µg/m³+4%
466	ChiryūAichi, Japan	51	52	+0.4 µg/m³+4%
467	YoriiSaitama, Japan	50	52	+0.4 µg/m³+4%
468	Kodamachō-kodamaminamiSaitama, Japan	50	52	+0.4 µg/m³+4%
469	Ureshinomachi-shimojukuSaga, Japan	49	51	+0.4 µg/m³+4%
470	YameFukuoka, Japan	48	51	+0.4 µg/m³+5%
471	KaminokawaTochigi, Japan	47	49	+0.4 µg/m³+5%
472	YanagawaFukuoka, Japan	45	47	+0.4 µg/m³+5%
473	ObihiroHokkaido, Japan	33	36	+0.4 µg/m³+7%
474	KushiroHokkaido, Japan	31	33	+0.4 µg/m³+7%
475	Kameda-honchōNiigata, Japan	40	42	+0.4 µg/m³+6%
476	IkiNagasaki, Japan	40	42	+0.4 µg/m³+6%
477	MinamirinkanKanagawa, Japan	51	52	+0.4 µg/m³+4%
478	KochiJapan	51	52	+0.4 µg/m³+4%
479	NakamaFukuoka, Japan	49	51	+0.4 µg/m³+5%
480	Maebaru-chūōFukuoka, Japan	55	55	+0.3 µg/m³+3%
481	MinamataKumamoto, Japan	54	54	+0.3 µg/m³+3%
482	KotōKumamoto, Japan	54	54	+0.3 µg/m³+3%
483	NagasakiJapan	51	52	+0.3 µg/m³+3%
484	IsahayaNagasaki, Japan	47	49	+0.3 µg/m³+4%
485	ChichibuSaitama, Japan	47	49	+0.3 µg/m³+4%
486	Kaseda-shirakameKagoshima, Japan	45	47	+0.3 µg/m³+4%
487	MoriokaIwate, Japan	45	47	+0.3 µg/m³+4%
488	IchinosekiIwate, Japan	39	41	+0.3 µg/m³+4%
489	SusonoShizuoka, Japan	43	45	+0.3 µg/m³+4%
490	NoshiroAkita, Japan	40	42	+0.3 µg/m³+4%
491	SapporoHokkaido, Japan	34	36	+0.3 µg/m³+5%
492	SakataYamagata, Japan	49	51	+0.3 µg/m³+3%
493	ŌmeTokyo, Japan	51	51	+0.2 µg/m³+2%
494	ShinjōYamagata, Japan	43	44	+0.2 µg/m³+3%
495	MuroranHokkaido, Japan	43	44	+0.2 µg/m³+3%
496	KisoNagano, Japan	43	44	+0.2 µg/m³+3%
497	Niitsu-honchōNiigata, Japan	39	41	+0.2 µg/m³+3%
498	AmamiKagoshima, Japan	38	39	+0.2 µg/m³+3%
499	HanamakiIwate, Japan	37	38	+0.2 µg/m³+3%
500	HakodateHokkaido, Japan	36	37	+0.2 µg/m³+3%
501	ChikugoFukuoka, Japan	56	57	+0.2 µg/m³+2%
502	NobeokaMiyazaki, Japan	52	52	+0.2 µg/m³+2%
503	ŌmuraNagasaki, Japan	49	50	+0.2 µg/m³+2%
504	SaseboNagasaki, Japan	52	52	+0.1 µg/m³+1%
505	KashimaSaga, Japan	52	52	+0.1 µg/m³+1%
506	TosuSaga, Japan	52	52	+0.1 µg/m³+1%
507	KawatanaNagasaki, Japan	47	48	+0.1 µg/m³+1%
508	MorouraSaga, Japan	46	47	+0.1 µg/m³+1%
509	ImaichiTochigi, Japan	45	46	+0.1 µg/m³+1%
510	KujiIwate, Japan	33	33	+0.1 µg/m³+2%

The 32 cities that got cleaner, biggest fall first

#	City	2024	2025	Change
1	MiyakoIwate, Japan	42	30	−2.2 µg/m³−29%
2	AomoriJapan	51	39	−2.0 µg/m³−22%
3	KazoSaitama, Japan	55	52	−1.2 µg/m³−11%
4	TōmaHokkaido, Japan	43	37	−1.1 µg/m³−14%
5	ChikuseiIbaraki, Japan	55	53	−1.1 µg/m³−10%
6	AyaseKanagawa, Japan	57	55	−1.1 µg/m³−9%
7	AsahikawaHokkaido, Japan	47	42	−1.0 µg/m³−12%
8	Ōyanomachi-noboritateKumamoto, Japan	54	53	−0.8 µg/m³−7%
9	MinokamoGifu, Japan	39	34	−0.8 µg/m³−11%
10	AraoKumamoto, Japan	55	53	−0.7 µg/m³−6%
11	Hondomachi-hondoKumamoto, Japan	55	53	−0.7 µg/m³−6%
12	TomiokaKumamoto, Japan	55	53	−0.7 µg/m³−6%
13	KasaokaOkayama, Japan	58	57	−0.6 µg/m³−5%
14	GotembaShizuoka, Japan	52	52	−0.5 µg/m³−5%
15	IgusaSaitama, Japan	54	53	−0.5 µg/m³−5%
16	ObitaNagasaki, Japan	49	47	−0.4 µg/m³−5%
17	IrumaSaitama, Japan	53	52	−0.4 µg/m³−4%
18	YokoteAkita, Japan	41	39	−0.3 µg/m³−4%
19	SaikaiNagasaki, Japan	47	45	−0.3 µg/m³−4%
20	YoshiokaMiyagi, Japan	47	45	−0.3 µg/m³−4%
21	ChitoseHokkaido, Japan	52	51	−0.3 µg/m³−3%
22	TogitsuNagasaki, Japan	52	52	−0.3 µg/m³−3%
23	KitamiHokkaido, Japan	39	37	−0.3 µg/m³−4%
24	SadoNiigata, Japan	46	44	−0.3 µg/m³−4%
25	SaikuboGunma, Japan	46	44	−0.2 µg/m³−2%
26	MatsuuraNagasaki, Japan	52	52	−0.2 µg/m³−2%
27	Misato, SaitamaSaitama, Japan	55	55	−0.1 µg/m³−1%
28	TomakomaiHokkaido, Japan	34	34	−0.1 µg/m³−2%
29	FurukawamenNagasaki, Japan	46	45	−0.1 µg/m³−1%
30	GotōNagasaki, Japan	48	47	−0.1 µg/m³−1%
31	KaratsuSaga, Japan	48	47	−0.1 µg/m³−1%
32	UtoKumamoto, Japan	53	53	−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.