SmogRank / Japan / Akita / Akita
Akita, month by month
Akita has a measured daily mean on 1,049 days since 28 July 2023. Its worst month was April 2024, at 56 US AQI (11.8 µg/m³), 746th of 2,520 cities on that month's world ranking. Its cleanest was December 2024, at 28 US AQI (5.1 µg/m³). 2025 averaged 44 US AQI (7.9 µg/m³), against 41 US AQI (7.4 µg/m³) in 2024.
Every month since 2023
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
5 months
| Month | Why |
|---|---|
| Oct 2026 | No day measured. The others: 13 with no readings from the monitors. |
| Sep 2026 | No day measured. The others: 30 with no readings from the monitors. |
| Aug 2026 | No day measured. The others: 31 with no readings from the monitors. |
| Jul 2026 | 16 of 31 days measured; a month needs 22. The others: 14 with no readings from the monitors, 1 with readings for part of the day (a day needs 18 hours). |
| Jul 2023 | 4 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.
Akita's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| April 2024 | 5611.8 µg/m³ | 746thof 2,520 | Japan and South Korea, April 2024 |
| March 2026 | 5511.4 µg/m³ | 1,520thof 3,285 | Japan and South Korea, March 2026 |
| March 2025 | 5410.9 µg/m³ | 1,595thof 3,102 | – |
| July 2024 | 529.7 µg/m³ | 804thof 2,566 | Japan, 12 to 14 July 2024 |
| April 2026 | 529.7 µg/m³ | 1,174thof 3,307 | – |
| July 2025 | 529.5 µg/m³ | 1,433rdof 3,073 | – |
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.
Akita's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Apr 2024 | 9532.5 µg/m³ | Japan and South Korea, April 2024 |
| 14 Jul 2024 | 8628.0 µg/m³ | Japan, 12 to 14 July 2024 |
| 26 Apr 2025 | 8627.7 µg/m³ | – |
| 30 Mar 2026 | 8125.0 µg/m³ | Japan and South Korea, March 2026 |
| 4 Jul 2025 | 7923.9 µg/m³ | – |
| 22 Mar 2025 | 7823.4 µg/m³ | – |
| 25 Mar 2025 | 7723.3 µg/m³ | – |
| 29 Mar 2026 | 7723.3 µg/m³ | Japan and South Korea, March 2026 |
| 30 Mar 2024 | 7723.0 µg/m³ | – |
| 3 Jul 2025 | 7722.9 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, Akita, Japan, 28 Jul 2023 – 16 Jul 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/akita/history (accessed 14 Oct 2026).
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.
Akita now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-14 00:07 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).