SmogRank / World / Asia / Japan / Fukui

Most polluted cities in Fukui, Japan

7 measured cities, this year; 7 above the WHO annual guideline. Worst: Fukui-shi at 9.8 µg/m³, #1,039 in the world.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

Hyōgo: 17 measured citiesIshikawa: 9 measured citiesKyoto: 14 measured citiesMie: 16 measured citiesShiga: 9 measured citiesToyama: 8 measured citiesFukui: 7 measured citiesAichi: 23 measured citiesGifu: 15 measured cities#7 Ono: 7.3 µg/m³#6 Kumagawa: 7.6 µg/m³#5 Tsuruga: 7.7 µg/m³#3 Sabae: 8.1 µg/m³#4 Obama: 8.1 µg/m³#2 Mikuni: 8.5 µg/m³#1 Fukui-shi: 9.8 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Fukui-shi 0% 0.75%0
Every measured city in Fukui, Japan, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Fukui-shi 0%
  2. 2Mikunilast full day 2 Oct 0%
  3. 3Sabae 0%
  4. 3Obama 0%
  5. 5Tsuruga 0%
  6. 6Kumagawa 0%
  7. 7Ono 0%
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

Estimated: cities without a monitor

Fukui cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Sakai≈ 6 µg/m³Good
Echizen≈ 6 µg/m³Good
Takefu≈ 6 µg/m³Good
Maruoka≈ 5 µg/m³Good
Awara≈ 7 µg/m³Good
Katsuyama≈ 5 µg/m³Good
Iijima≈ 5 µg/m³Good

Bad-air episodes in Fukui

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

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SmogRank, most polluted cities in Fukui, Japan, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/jp/region/fukui?w=year.

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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.

Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.