SmogRank / Japan / Kanagawa

Air quality in Yokohama

Kanagawa, Japan. PM2.5 from 20 reference monitors, updated hourly.

13.0µg/m³
Moderate

Latest hour (16:00 UTC), 0.9× the WHO 24-hour guideline.

Rank, worst first

24 hours–not enough data
7 days#1,325of 2,330, at 6.6 µg/m³
30 days#1,373of 2,324, at 5.8 µg/m³
This year#1,244of 2,173, at 8.4 µg/m³

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 5.5 µg/m³2025-11-02: 7.2 µg/m³2025-11-03: 4.9 µg/m³2025-11-04: 4.1 µg/m³2025-11-05: 9.0 µg/m³2025-11-06: 6.2 µg/m³2025-11-07: 7.2 µg/m³2025-11-08: 9.2 µg/m³2025-11-09: 9.5 µg/m³2025-11-10: 8.1 µg/m³2025-11-11: 3.9 µg/m³2025-11-12: 7.0 µg/m³2025-11-13: 13.5 µg/m³2025-11-14: 12.8 µg/m³2025-11-15: 8.9 µg/m³2025-11-16: 10.3 µg/m³2025-11-17: 11.4 µg/m³2025-11-18: 3.2 µg/m³2025-11-19: 5.8 µg/m³2025-11-20: 9.2 µg/m³2025-11-21: 14.2 µg/m³2025-11-22: 7.1 µg/m³2025-11-23: 9.3 µg/m³2025-11-24: 12.1 µg/m³2025-11-25: 12.9 µg/m³2025-11-26: 6.2 µg/m³2025-11-27: 9.2 µg/m³2025-11-28: 8.7 µg/m³2025-11-29: 5.5 µg/m³2025-11-30: 9.4 µg/m³2025-12-01: 11.6 µg/m³2025-12-02: 17.6 µg/m³2025-12-03: 17.9 µg/m³2025-12-04: 3.5 µg/m³2025-12-05: 6.1 µg/m³2025-12-06: 8.4 µg/m³2025-12-07: 11.6 µg/m³2025-12-08: 10.7 µg/m³2025-12-09: 4.4 µg/m³2025-12-10: 9.9 µg/m³2025-12-11: 7.2 µg/m³2025-12-12: 3.0 µg/m³2025-12-13: 4.1 µg/m³2025-12-14: 7.2 µg/m³2025-12-15: 3.6 µg/m³2025-12-16: 5.9 µg/m³2025-12-17: 9.3 µg/m³2025-12-18: 3.7 µg/m³2025-12-19: 8.1 µg/m³2025-12-20: 19.0 µg/m³2025-12-21: 12.9 µg/m³2025-12-22: 2.5 µg/m³2025-12-23: 6.4 µg/m³2025-12-24: 7.9 µg/m³2025-12-25: 9.7 µg/m³2025-12-26: 4.4 µg/m³2025-12-27: 6.1 µg/m³2025-12-28: 8.5 µg/m³2025-12-29: 9.6 µg/m³2025-12-30: 15.0 µg/m³2025-12-31: 8.0 µg/m³2026-01-01: 4.3 µg/m³2026-01-02: 3.8 µg/m³2026-01-03: 4.1 µg/m³2026-01-04: 5.1 µg/m³2026-01-05: 8.1 µg/m³2026-01-06: 3.0 µg/m³2026-01-07: 6.6 µg/m³2026-01-08: 7.3 µg/m³2026-01-09: 4.0 µg/m³2026-01-10: 6.4 µg/m³2026-01-11: 6.6 µg/m³2026-01-12: 3.4 µg/m³2026-01-13: 6.7 µg/m³2026-01-14: 4.3 µg/m³2026-01-15: 9.1 µg/m³2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: 8.0 µg/m³2026-01-21: 3.6 µg/m³2026-01-22: 3.5 µg/m³2026-01-23: no data2026-01-24: no data2026-01-25: no data2026-01-26: 4.0 µg/m³2026-01-27: 9.1 µg/m³2026-01-28: 3.3 µg/m³2026-01-29: no data2026-01-30: 4.5 µg/m³2026-01-31: 4.9 µg/m³2026-02-01: 5.7 µg/m³2026-02-02: 7.0 µg/m³2026-02-03: 5.0 µg/m³2026-02-04: 10.9 µg/m³2026-02-05: 18.4 µg/m³2026-02-06: 16.7 µg/m³2026-02-07: 4.5 µg/m³2026-02-08: 3.6 µg/m³2026-02-09: 3.6 µg/m³2026-02-10: 7.0 µg/m³2026-02-11: 8.6 µg/m³2026-02-12: 10.0 µg/m³2026-02-13: 13.0 µg/m³2026-02-14: 17.0 µg/m³2026-02-15: 17.3 µg/m³2026-02-16: 13.2 µg/m³2026-02-17: 5.3 µg/m³2026-02-18: 10.7 µg/m³2026-02-19: 4.4 µg/m³2026-02-20: 8.8 µg/m³2026-02-21: 11.9 µg/m³2026-02-22: 13.5 µg/m³2026-02-23: 11.9 µg/m³2026-02-24: 12.6 µg/m³2026-02-25: 8.4 µg/m³2026-02-26: 3.4 µg/m³2026-02-27: 5.6 µg/m³2026-02-28: 6.8 µg/m³2026-03-01: 5.8 µg/m³2026-03-02: 9.1 µg/m³2026-03-03: 6.5 µg/m³2026-03-04: 1.5 µg/m³2026-03-05: 3.7 µg/m³2026-03-06: no data2026-03-07: no data2026-03-08: no data2026-03-09: 7.3 µg/m³2026-03-10: 5.0 µg/m³2026-03-11: 6.4 µg/m³2026-03-12: 5.7 µg/m³2026-03-13: 6.7 µg/m³2026-03-14: 3.5 µg/m³2026-03-15: 4.5 µg/m³2026-03-16: 5.6 µg/m³2026-03-17: 10.3 µg/m³2026-03-18: 9.7 µg/m³2026-03-19: 10.1 µg/m³2026-03-20: 10.0 µg/m³2026-03-21: 15.0 µg/m³2026-03-22: 15.1 µg/m³2026-03-23: 12.0 µg/m³2026-03-24: 13.8 µg/m³2026-03-25: 14.1 µg/m³2026-03-26: 6.1 µg/m³2026-03-27: 7.8 µg/m³2026-03-28: 9.6 µg/m³2026-03-29: 15.3 µg/m³2026-03-30: 16.3 µg/m³2026-03-31: 7.0 µg/m³2026-04-01: 6.8 µg/m³2026-04-02: 3.5 µg/m³2026-04-03: 6.9 µg/m³2026-04-04: 10.5 µg/m³2026-04-05: 9.8 µg/m³2026-04-06: 9.4 µg/m³2026-04-07: 11.4 µg/m³2026-04-08: 7.7 µg/m³2026-04-09: 7.3 µg/m³2026-04-10: 7.7 µg/m³2026-04-11: 15.4 µg/m³2026-04-12: 9.9 µg/m³2026-04-13: 12.4 µg/m³2026-04-14: 14.2 µg/m³2026-04-15: 11.6 µg/m³2026-04-16: 6.8 µg/m³2026-04-17: 7.2 µg/m³2026-04-18: 10.7 µg/m³2026-04-19: 12.3 µg/m³2026-04-20: 11.2 µg/m³2026-04-21: 7.6 µg/m³2026-04-22: 11.3 µg/m³2026-04-23: 9.4 µg/m³2026-04-24: 8.7 µg/m³2026-04-25: 7.7 µg/m³2026-04-26: 9.1 µg/m³2026-04-27: 6.3 µg/m³2026-04-28: 8.0 µg/m³2026-04-29: 13.4 µg/m³2026-04-30: 7.1 µg/m³2026-05-01: 4.7 µg/m³2026-05-02: 5.9 µg/m³2026-05-03: 13.7 µg/m³2026-05-04: 8.4 µg/m³2026-05-05: 6.8 µg/m³2026-05-06: 7.2 µg/m³2026-05-07: 5.4 µg/m³2026-05-08: 7.0 µg/m³2026-05-09: 5.8 µg/m³2026-05-10: 6.9 µg/m³2026-05-11: 6.0 µg/m³2026-05-12: 6.6 µg/m³2026-05-13: 7.8 µg/m³2026-05-14: 12.4 µg/m³2026-05-15: 14.0 µg/m³2026-05-16: 15.7 µg/m³2026-05-17: 16.0 µg/m³2026-05-18: 16.0 µg/m³2026-05-19: 11.1 µg/m³2026-05-20: 6.5 µg/m³2026-05-21: 4.0 µg/m³2026-05-22: 5.4 µg/m³2026-05-23: 8.5 µg/m³2026-05-24: 7.6 µg/m³2026-05-25: 6.0 µg/m³2026-05-26: 5.7 µg/m³2026-05-27: 7.6 µg/m³2026-05-28: 3.9 µg/m³2026-05-29: 7.2 µg/m³2026-05-30: 7.2 µg/m³2026-05-31: 13.1 µg/m³2026-06-01: 13.9 µg/m³2026-06-02: 5.7 µg/m³2026-06-03: 3.1 µg/m³2026-06-04: 3.9 µg/m³2026-06-05: 6.2 µg/m³2026-06-06: 5.6 µg/m³2026-06-07: 10.4 µg/m³2026-06-08: 4.8 µg/m³2026-06-09: 5.0 µg/m³2026-06-10: 6.9 µg/m³2026-06-11: 5.9 µg/m³2026-06-12: 9.3 µg/m³2026-06-13: 17.5 µg/m³2026-06-14: 12.7 µg/m³2026-06-15: 4.9 µg/m³2026-06-16: 7.8 µg/m³2026-06-17: 6.4 µg/m³2026-06-18: 4.2 µg/m³2026-06-19: 11.0 µg/m³2026-06-20: 8.3 µg/m³2026-06-21: 4.8 µg/m³2026-06-22: 6.8 µg/m³2026-06-23: 5.6 µg/m³2026-06-24: 8.7 µg/m³2026-06-25: 5.8 µg/m³2026-06-26: 4.6 µg/m³2026-06-27: 4.2 µg/m³2026-06-28: 6.3 µg/m³2026-06-29: 8.0 µg/m³2026-06-30: 14.8 µg/m³2026-07-01: 12.4 µg/m³2026-07-02: 5.6 µg/m³2026-07-03: 7.6 µg/m³2026-07-04: 10.1 µg/m³2026-07-05: 6.8 µg/m³2026-07-06: 10.7 µg/m³2026-07-07: 8.8 µg/m³2026-07-08: 7.0 µg/m³2026-07-09: 5.2 µg/m³2026-07-10: 4.2 µg/m³2026-07-11: 5.1 µg/m³2026-07-12: 9.2 µg/m³2026-07-13: 16.7 µg/m³2026-07-14: 15.1 µg/m³2026-07-15: 13.7 µg/m³2026-07-16: 26.4 µg/m³2026-07-17: 17.2 µg/m³2026-07-18: 5.6 µg/m³2026-07-19: 3.6 µg/m³2026-07-20: 8.6 µg/m³2026-07-21: 14.8 µg/m³2026-07-22: 20.8 µg/m³2026-07-23: 20.3 µg/m³2026-07-24: 15.5 µg/m³2026-07-25: 16.7 µg/m³2026-07-26: 7.7 µg/m³2026-07-27: 7.4 µg/m³2026-07-28: 9.8 µg/m³2026-07-29: 11.3 µg/m³2026-07-30: 13.6 µg/m³2026-07-31: 18.2 µg/m³2026-08-01: 21.0 µg/m³2026-08-02: 17.8 µg/m³2026-08-03: 6.5 µg/m³2026-08-04: 8.3 µg/m³2026-08-05: 8.6 µg/m³2026-08-06: 6.8 µg/m³2026-08-07: 6.7 µg/m³2026-08-08: 5.7 µg/m³2026-08-09: 9.1 µg/m³2026-08-10: 7.3 µg/m³2026-08-11: 8.5 µg/m³2026-08-12: 6.9 µg/m³2026-08-13: 5.2 µg/m³2026-08-14: 4.1 µg/m³2026-08-15: 6.0 µg/m³2026-08-16: 5.6 µg/m³2026-08-17: 7.5 µg/m³2026-08-18: 6.5 µg/m³2026-08-19: 7.2 µg/m³2026-08-20: 5.7 µg/m³2026-08-21: 5.7 µg/m³2026-08-22: 7.4 µg/m³2026-08-23: 13.1 µg/m³2026-08-24: 14.7 µg/m³2026-08-25: 9.6 µg/m³2026-08-26: 11.8 µg/m³2026-08-27: 8.2 µg/m³2026-08-28: 7.6 µg/m³2026-08-29: 6.8 µg/m³2026-08-30: 8.4 µg/m³2026-08-31: 6.2 µg/m³2026-09-01: 7.3 µg/m³2026-09-02: 7.0 µg/m³2026-09-03: 4.8 µg/m³2026-09-04: 7.8 µg/m³2026-09-05: 6.7 µg/m³2026-09-06: 4.1 µg/m³2026-09-07: 3.9 µg/m³2026-09-08: 8.0 µg/m³2026-09-09: 6.8 µg/m³2026-09-10: 5.3 µg/m³2026-09-11: 5.4 µg/m³2026-09-12: 3.9 µg/m³2026-09-13: 9.6 µg/m³2026-09-14: 4.7 µg/m³2026-09-15: 4.4 µg/m³2026-09-16: 4.2 µg/m³2026-09-17: 5.4 µg/m³2026-09-18: 5.6 µg/m³2026-09-19: 5.0 µg/m³2026-09-20: 4.3 µg/m³2026-09-21: 1.6 µg/m³2026-09-22: 5.7 µg/m³2026-09-23: 7.5 µg/m³2026-09-24: 8.4 µg/m³2026-09-25: 8.7 µg/m³2026-09-26: 5.2 µg/m³2026-09-27: 6.3 µg/m³2026-09-28: 7.6 µg/m³2026-09-29: 6.5 µg/m³2026-09-30: 5.1 µg/m³2026-10-01: no data
26 of 353 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Last 4 days, hour by hour

15302026-09-30 23:00 UTC: 6.5 µg/m³2026-10-01 00:00 UTC: 5.5 µg/m³2026-10-01 01:00 UTC: 6.0 µg/m³2026-10-01 02:00 UTC: 6.0 µg/m³2026-10-01 03:00 UTC: 6.5 µg/m³2026-10-01 04:00 UTC: 5.5 µg/m³2026-10-01 05:00 UTC: 5.5 µg/m³2026-10-01 06:00 UTC: 9.5 µg/m³2026-10-01 07:00 UTC: 14.0 µg/m³2026-10-01 08:00 UTC: 7.5 µg/m³2026-10-01 09:00 UTC: 9.0 µg/m³2026-10-01 10:00 UTC: 9.0 µg/m³2026-10-01 11:00 UTC: 10.5 µg/m³2026-10-01 12:00 UTC: 9.5 µg/m³2026-10-01 13:00 UTC: 8.5 µg/m³2026-10-01 16:00 UTC: 13.0 µg/m³Sep 28Sep 29Sep 30Oct 1
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Its world rank, day by day

#1#2220NovDecJanFebMarAprMayJunJulAugSep
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 7.8 µg/m³Jan 2026: 5.4 µg/m³JanFeb 2025: 6.4 µg/m³Feb 2026: 9.5 µg/m³FebMar 2025: 10.8 µg/m³Mar 2026: 8.7 µg/m³MarApr 2025: 9.6 µg/m³Apr 2026: 9.4 µg/m³AprMay 2025: 9.1 µg/m³May 2026: 8.4 µg/m³MayJun 2025: 10.1 µg/m³Jun 2026: 7.4 µg/m³JunJul 2025: 10.9 µg/m³Jul 2026: 11.5 µg/m³JulAug 2025: 13.2 µg/m³Aug 2026: 8.4 µg/m³AugSep 2025: 8.7 µg/m³Sep 2026: 5.9 µg/m³SepOct 2025: 7.4 µg/m³OctNov 2025: 8.4 µg/m³NovDec 2025: 8.5 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 6.6 µg/m³6.620252025: 8.4 µg/m³8.420242024: 7.5 µg/m³7.520232023: 9.5 µg/m³9.5
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

20 monitors: 20 reference, 0 low-cost
StationOperatorType
川崎市川崎区日進町２３－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
川崎市川崎区東門前２－１－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
川崎市川崎区池上町３政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
川崎市川崎区田島町２０－５政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市中区本牧大里町３４政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市保土ヶ谷区桜ヶ丘２－１５－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市南区南太田２－３０－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市戸塚区戸塚町４２７２政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市旭区鶴ヶ峰町１－４２政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市港北区大豆戸町２６－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市港南区野庭町613政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市磯子区磯子３－５－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市神奈川区広台太田町３－８政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市西区平沼２－１１－３６政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市西区浅間町１－１６政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市金沢区富岡東６－１６－１政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横浜市鶴見区本町通４－１７１－２３政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
横須賀市夏島町９政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
川崎市川崎区東田町5-4政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference
川崎市川崎区砂子1-9-3政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0)Ministry of the Environment Air Pollutant Wide Area Monitoring SystemReference

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Japan

30-day averages, µg/m³. All of Japan.

Updated 2026-10-01 18:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.