SmogRank / World / Japan / Saitama / July 2024

Most polluted cities in Saitama, Japan, July 2024

31 cities in Saitama, Japan ranked by their average PM2.5 over the 31 days. Worst: Iruma at 14.5 µg/m³, #176 of 2,519 cities in the world. Cleanest: Ogawamachi at 9.8. 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.

← Iruma 0% 0.75%0

Every city in Saitama, Japan ranked for July 2024, 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.

1Iruma
0%
2Igusa
0%
3Gyōda
0%
3Misato, Saitama
0%
5Kazo
0%
5Ageo
0%
7Morohongō
0%
8Tokorozawa
0%
9Kawaguchi
0%
9Higashi-Matsuyama
0%
11Kōnosu
0%
11Kawagoe
0%
13Niiza
0%
14Kodamachō-kodamaminami
0%
15Menuma
0%
15Asaka
0%
17Sayama
0%
18Sōka
0%
19Yorii
0%
19Kukichūō
0%
21Sakado
0%
21Minano
0%
21Saitama
0%
24Kumagaya
0%
24Hannō
0%
26Honjō
0%
27Koshigaya
0%
27Hanyū
0%
29Kasukabe
0%
30Chichibu
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, July 2024, smogrank.com/jp/region/saitama/history/2024-07 (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.