SmogRank / World / Japan / Saitama / June 2025

Most polluted cities in Saitama, Japan, June 2025

27 cities in Saitama, Japan ranked by their average PM2.5 over the 30 days. Worst: Gyōda at 12.4 µg/m³, #721 of 2,453 cities in the world. Cleanest: Ogawamachi at 9.0. 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 June 2025, 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%
3Iruma
0%
4Menuma
0%
5Niiza
0%
6Yorii
0%
7Morohongō
0%
7Asaka
0%
7Higashi-Matsuyama
0%
10Sakado
0%
11Sōka
0%
11Kawagoe
0%
11Misato, Saitama
0%
14Kōnosu
0%
14Igusa
0%
16Hannō
0%
17Kukichūō
0%
18Kumagaya
0%
19Kazo
0%
19Kawaguchi
0%
21Tokorozawa
0%
22Koshigaya
0%
23Sayama
0%
23Saitama
0%
25Hanyū
0%
26Kasukabe
0%
27Ogawamachi
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

All cities in the world, June 2025 · All cities in Japan, June 2025 · Saitama now

Use this board

SmogRank, most polluted cities in Saitama, Japan, PM2.5, June 2025, smogrank.com/jp/region/saitama/history/2025-06 (accessed 7 Oct 2026).

Download top 10 (PNG)

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.