SmogRank / Japan / Saitama / Kodamachō-kodamaminami
Kodamachō-kodamaminami, month by month
Kodamachō-kodamaminami has a measured daily mean on 1,103 days since 10 August 2023. Its worst month was April 2024, at 62 US AQI (14.8 µg/m³), 420th of 2,520 cities on that month's world ranking. Its cleanest was September 2026, at 29 US AQI (5.2 µg/m³). 2025 averaged 52 US AQI (9.4 µg/m³), against 51 US AQI (9.2 µg/m³) in 2024.
Every month since 2023
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
Months without a mean, and why
2 months
| Month | Why |
|---|---|
| Jul 2026 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Kodamachō-kodamaminami's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| April 2024 | 6214.8 µg/m³ | 420thof 2,520 | Japan and South Korea, April 2024 |
| July 2024 | 5712.2 µg/m³ | 402ndof 2,566 | – |
| August 2025 | 5611.8 µg/m³ | 823rdof 2,901 | – |
| June 2025 | 5511.5 µg/m³ | 891stof 2,508 | – |
| April 2025 | 5511.4 µg/m³ | 849thof 2,951 | Japan, 19 to 20 April 2025 |
| March 2026 | 5511.4 µg/m³ | 1,340thof 2,971 | – |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Kodamachō-kodamaminami's worst days
| Day | US AQI | Episode |
|---|---|---|
| 18 Apr 2024 | 9532.8 µg/m³ | Japan and South Korea, April 2024 |
| 4 Nov 2023 | 9331.6 µg/m³ | Japan, November 2023 |
| 26 Mar 2025 | 9331.5 µg/m³ | Japan and South Korea, March 2025 |
| 19 Apr 2024 | 9030.0 µg/m³ | Japan and South Korea, April 2024 |
| 21 May 2025 | 8929.5 µg/m³ | Japan, May 2025 |
| 22 Mar 2026 | 8728.4 µg/m³ | – |
| 20 Apr 2024 | 8527.3 µg/m³ | Japan and South Korea, April 2024 |
| 19 Apr 2025 | 8527.1 µg/m³ | Japan, 19 to 20 April 2025 |
| 25 Mar 2025 | 8426.6 µg/m³ | Japan and South Korea, March 2025 |
| 3 Nov 2023 | 8326.5 µg/m³ | Japan, November 2023 |
Daily means, the highest since 10 Aug 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Kodamachō-kodamaminami, Japan, 10 Aug 2023 – 12 Oct 2026. Monitor data from Ministry of the Environment Air Pollutant Wide Area Monitoring System via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/jp/kodamacho-kodamaminami/history (accessed 13 Oct 2026).
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.
Kodamachō-kodamaminami now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).