Japan · Saitama · 14 cities
Air quality in Saitama today The AQI right now, city by city
Right now, Tokorozawa has the cleanest air of the 14 cities we track in Saitama (AQI 39, Good), and Kawaguchi the worst (AQI 56, Moderate). Iruma has the most tree cover, at 37.2% — #16 of 207 cities measured in Japan.
Every city is measured the same way, over the same 2 km around its center: the air quality right now, from ground stations where there are any, and its tree cover.
AQI 48
Average right now
Good
- cities tracked
- 14
- average tree cover
- 10.9%
- Japan: 16.4%
- worst air now: Kawaguchi
- 56
- cleanest air now: Tokorozawa
- 39
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Saitama · average AQI 48
Air quality today across Saitama, city by city
| Saitama | 52Moderate | 18.3% | 36.8K | #65 of 207 |
|---|---|---|---|---|
| Kawaguchi | 56Moderate | 4.3% | 77.9K | #182 of 207 |
| Kawagoe | 40Good | 4.0% | 81.7K | #185 of 207 |
| Koshigaya | 53Moderate | 3.9% | 81.9K | #186 of 207 |
| Tokorozawa | 39Good | 13.5% | 51.8K | #89 of 207 |
| Kasukabe | 52Moderate | 5.5% | 76.6K | #166 of 207 |
| Ageo | 50Good | 18.9% | 34.9K | #59 of 207 |
| Kumagaya | 50Good | 8.6% | 67.2K | #137 of 207 |
| Niiza | 53Moderate | 11.0% | 59.7K | #111 of 207 |
| Kukichūō | 52Moderate | 8.2% | 68.5K | #141 of 207 |
| Iruma | 39Good | 37.2% | — | #16 of 207 |
| Kōnosu | 51Moderate | 4.5% | 80.1K | #179 of 207 |
| Kazo | 46Good | 3.8% | 82.3K | #188 of 207 |
| Sakado | 42Good | 10.5% | 61.3K | #116 of 207 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 2 km of each city center from Sentinel-2 imagery; the rank compares every city measured in Japan.
Deforestation · 2001–2025
How much forest has Saitama lost?
Since 2001, Saitama has lost about 3,090 hectares of forest (about 4,300 football pitches): 2.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 946 hectares (31%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 3,090 haabout 4,300 football pitches
- Share of its forest
- 2.1%of what there was in 2000
- Cleared for good
- 946 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 23 ha | 131 ha | 154 ha |
| 2002 | 22 ha | 147 ha | 169 ha |
| 2003 | 28 ha | 47 ha | 75 ha |
| 2004 | 46 ha | 62 ha | 108 ha |
| 2005 | 31 ha | 109 ha | 140 ha |
| 2006 | 45 ha | 51 ha | 95 ha |
| 2007 | 57 ha | 155 ha | 212 ha |
| 2008 | 87 ha | 92 ha | 179 ha |
| 2009 | 24 ha | 89 ha | 113 ha |
| 2010 | 51 ha | 181 ha | 232 ha |
| 2011 | 13 ha | 97 ha | 110 ha |
| 2012 | 69 ha | 122 ha | 191 ha |
| 2013 | 21 ha | 42 ha | 63 ha |
| 2014 | 10 ha | 39 ha | 50 ha |
| 2015 | 26 ha | 57 ha | 83 ha |
| 2016 | 62 ha | 181 ha | 242 ha |
| 2017 | 28 ha | 71 ha | 99 ha |
| 2018 | 57 ha | 89 ha | 146 ha |
| 2019 | 38 ha | 62 ha | 99 ha |
| 2020 | 52 ha | 84 ha | 136 ha |
| 2021 | 50 ha | 37 ha | 87 ha |
| 2022 | 36 ha | 60 ha | 96 ha |
| 2023 | 31 ha | 54 ha | 85 ha |
| 2024 | 23 ha | 38 ha | 61 ha |
| 2025 | 17 ha | 53 ha | 69 ha |
Forest loss is slowing down: about 80 hectares a year in 2021–2025, down from 144 hectares a year in 2016–2020. The worst year was 2016, when about 242 hectares of forest were lost.
What is causing deforestation in Saitama?
- Loggingcan grow back62% · 1,930 ha
- Towns and roadscleared for good25% · 768 ha
- Mining and energycleared for good4.2% · 131 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, wildfires, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. How it's measured
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