SmogRank / Japan / Aomori / Goshogawara

Goshogawara, month by month

Goshogawara has a measured daily mean on 358 days since 28 July 2023. Its worst month was July 2024, at 52 US AQI (9.6 µg/m³), 832nd of 2,566 cities on that month's world ranking. Its cleanest was August 2024, at 26 US AQI (4.7 µg/m³).

Every month since 2023

2026too few days for a mean (a year needs 200)30 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSep29#2,221Oct48#781
2025too few days for a mean (a year needs 256)0 days measured
JannoneFebnoneMarnoneAprnoneMaynoneJunnoneJulnoneAugnoneSepnoneOctnoneNovnoneDecnone
2024too few days for a mean (a year needs 257)179 days measured
Jan31#1,957Feb37#1,575Mar44#798AprnoneMay4 daysJun46#1,242Jul52#832Aug26#1,914Sep8 daysOct3 daysNovnoneDecnone
2023too few days for a mean (a year needs 256)149 days measured
JanFebMarAprMayJunJul4 daysAug38#1,359Sep37#1,628Oct37#1,264Nov33#1,719Dec31#1,936
Each square is a month's mean PM2.5 in US AQI from Goshogawara's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Goshogawara marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

Months without a mean, and why

27 months
MonthWhy
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jun 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Apr 2026No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Mar 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Feb 2026No day measured. The others: 28 with under 18 hours of readings or readings that failed our checks.
Jan 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Dec 2025No day measured.
Nov 2025No day measured.
Oct 2025No day measured.
Sep 2025No day measured.
Aug 2025No day measured.
Jul 2025No day measured.
Jun 2025No day measured.
May 2025No day measured.
Apr 2025No day measured.
Mar 2025No day measured.
Feb 2025No day measured.
Jan 2025No day measured.
Dec 2024No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 20243 of 31 days measured; a month needs 22. The others: 28 with under 18 hours of readings or readings that failed our checks.
Sep 20248 of 30 days measured; a month needs 21. The others: 22 with under 18 hours of readings or readings that failed our checks.
May 20244 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Apr 2024No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jul 20234 of 31 days measured; a month needs 22.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Goshogawara's worst months

MonthUS AQIDays measuredWorld rankEpisode
July 2024 529.6 µg/m³31 of 31832ndof 2,566Japan, 12 to 14 July 2024
June 2024 468.2 µg/m³29 of 301,242ndof 2,563–
March 2024 447.9 µg/m³26 of 31798thof 1,698–
August 2023 386.9 µg/m³30 of 311,359thof 1,980–
February 2024 376.7 µg/m³24 of 291,575thof 2,486Hokkaido and Aomori, Japan, February 2024
September 2023 376.6 µg/m³28 of 301,628thof 2,176–

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Goshogawara's worst days

DayUS AQIEpisode
14 Jul 2024 8929.7 µg/m³Japan, 12 to 14 July 2024
13 Jul 2024 8728.6 µg/m³Japan, 12 to 14 July 2024
14 Feb 2024 8527.1 µg/m³Hokkaido and Aomori, Japan, February 2024
15 Jul 2024 8527.1 µg/m³–
16 Jul 2024 7723.2 µg/m³–
15 Mar 2024 7220.2 µg/m³–
23 Jun 2024 6617.4 µg/m³–
17 Jul 2024 6617.3 µg/m³–
12 Jul 2024 6617.0 µg/m³Japan, 12 to 14 July 2024
13 Jun 2024 6416.2 µg/m³–

Daily means, the highest since 28 Jul 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Goshogawara, Japan, 28 Jul 2023 – 12 Oct 2026. Monitor data from Ministry of the Environment Air Pollutant Wide Area Monitoring System via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/jp/goshogawara/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Goshogawara now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 19:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).