SmogRank / World / Japan / Saitama / August 2023

Most polluted cities in Saitama, Japan, August 2023

30 cities in Saitama, Japan ranked by their average PM2.5 over the 31 days. Worst: Minano at 9.8 µg/m³, #621 of 1,926 cities in the world. Cleanest: Koshigaya at 5.8. 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.

← Minano 0% 0.75%0

Every city in Saitama, Japan ranked for August 2023, 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.

1Minano
0%
2Igusa
0%
3Iruma
0%
4Kazo
0%
4Gyōda
0%
4Misato, Saitama
0%
7Kodamachō-kodamaminami
0%
8Morohongō
0%
8Menuma
0%
8Hanyū
0%
8Ageo
0%
12Higashi-Matsuyama
0%
13Tokorozawa
0%
14Kōnosu
0%
15Niiza
0%
16Kasukabe
0%
16Asaka
0%
18Kawaguchi
0%
18Honjō
0%
20Chichibu
0%
20Sayama
0%
22Sakado
0%
22Kawagoe
0%
22Hannō
0%
22Saitama
0%
26Ogawamachi
0%
27Sōka
0%
27Kukichūō
0%
29Kumagaya
0%
30Koshigaya
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, August 2023, smogrank.com/jp/region/saitama/history/2023-08 (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.