SmogRank / Japan / Iwate / Miyako
Miyako, month by month
Miyako has a measured daily mean on 1,145 days since 28 July 2023. Its worst month was April 2024, at 57 US AQI (12.3 µg/m³), 677th of 2,520 cities on that month's world ranking. Its cleanest was August 2025, at 19 US AQI (3.4 µg/m³). 2025 averaged 31 US AQI (5.5 µg/m³), against 42 US AQI (7.5 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
2 months
| Month | Why |
|---|---|
| Nov 2024 | 19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| 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.
Miyako's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| April 2024 | 5712.3 µg/m³ | 677thof 2,520 | Japan and South Korea, April 2024 |
| March 2026 | 5712.3 µg/m³ | 1,154thof 2,971 | Japan and South Korea, March 2026 |
| April 2026 | 5611.8 µg/m³ | 735thof 2,941 | – |
| June 2024 | 529.8 µg/m³ | 700thof 2,563 | – |
| July 2024 | 529.5 µg/m³ | 859thof 2,566 | – |
| March 2024 | 498.8 µg/m³ | 621stof 1,698 | – |
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.
Miyako's worst days
| Day | US AQI | Episode |
|---|---|---|
| 26 Apr 2026 | 14352.5 µg/m³ | – |
| 18 Apr 2024 | 9130.8 µg/m³ | Japan and South Korea, April 2024 |
| 30 Mar 2026 | 9030.1 µg/m³ | Japan and South Korea, March 2026 |
| 24 Mar 2026 | 7924.2 µg/m³ | Japan and South Korea, March 2026 |
| 19 Apr 2024 | 7823.6 µg/m³ | Japan and South Korea, April 2024 |
| 27 Apr 2024 | 7723.3 µg/m³ | – |
| 31 Mar 2026 | 7723.1 µg/m³ | Japan and South Korea, March 2026 |
| 27 Apr 2026 | 7622.7 µg/m³ | – |
| 25 Mar 2026 | 7320.7 µg/m³ | Japan and South Korea, March 2026 |
| 25 Mar 2025 | 7220.6 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, Miyako, 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/miyako/history (accessed 12 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.
Miyako now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).