SmogRank / World / Japan / Saitama / March 2026

Most polluted cities in Saitama, Japan, March 2026

31 cities in Saitama, Japan ranked by their average PM2.5 over the 31 days. Worst: Gyōda at 11.7 µg/m³, #1,272 of 2,947 cities in the world. Cleanest: Ogawamachi at 8.4. A city needs measurements on 70% of the days to be ranked.

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.

← Gyōda 0% 0.75%0

Every city in Saitama, Japan ranked for March 2026, 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.

1Gyōda
0%
2Kodamachō-kodamaminami
0%
3Sakado
0%
3Igusa
0%
5Hanyū
0%
6Morohongō
0%
6Kazo
0%
6Ageo
0%
9Asaka
0%
10Menuma
0%
10Kōnosu
0%
10Hannō
0%
10Misato, Saitama
0%
10Higashi-Matsuyama
0%
10Iruma
0%
16Kumagaya
0%
17Yorii
0%
17Kukichūō
0%
19Sōka
0%
19Kawaguchi
0%
21Koshigaya
0%
21Niiza
0%
23Tokorozawa
0%
23Kasukabe
0%
25Chichibu
0%
25Saitama
0%
27Kawagoe
0%
28Honjō
0%
28Sayama
0%
30Minano
0%
31Ogawamachi
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

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SmogRank, most polluted cities in Saitama, Japan, PM2.5, March 2026, smogrank.com/jp/region/saitama/history/2026-03 (accessed 6 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.