Japan · Chiba · 13 cities
Air quality in Chiba today The AQI right now, city by city
Right now, Kisarazu has the cleanest air of the 13 cities we track in Chiba (AQI 6, Good), and Urayasu the worst (AQI 55, Moderate). Inzai has the most tree cover, at 45.5% — #10 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 37
Average right now
Good
- cities tracked
- 13
- average tree cover
- 19.4%
- Japan: 16.4%
- worst air now: Urayasu
- 55
- cleanest air now: Kisarazu
- 6
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Chiba · average AQI 37
Air quality today across Chiba, city by city
| Chiba | 33Good | 7.1% | 60.9K | #152 of 207 |
|---|---|---|---|---|
| Matsudo | 46Good | 10.9% | 58.4K | #112 of 207 |
| Kashiwa | 33Good | 13.6% | 51.4K | #88 of 207 |
| Ichihara | 22Good | 9.0% | 65.2K | #132 of 207 |
| Yachiyo | 39Good | 31.4% | — | #34 of 207 |
| Narashino | 47Good | 11.0% | 59.7K | #110 of 207 |
| Sakura | 45Good | 33.9% | — | #24 of 207 |
| Urayasu | 55Moderate | 8.1% | 64.2K | #142 of 207 |
| Noda | 52Moderate | 19.2% | 33.9K | #57 of 207 |
| Kisarazu | 6Good | 10.4% | 58.3K | #119 of 207 |
| Narita | 39Good | 31.6% | — | #31 of 207 |
| Kamagaya | 33Good | 21.0% | 28.3K | #51 of 207 |
| Inzai | 28Good | 45.5% | — | #10 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 Chiba lost?
Since 2001, Chiba has lost about 5,270 hectares of forest (about 7,400 football pitches): 2.8% of the forest it had in 2000. Most of it (72%) was deforestation, forest cleared for good, mainly for towns and roads.
- Forest lost since 2001
- 5,270 haabout 7,400 football pitches
- Share of its forest
- 2.8%of what there was in 2000
- Cleared for good
- 3,820 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 | 101 ha | 57 ha | 158 ha |
| 2002 | 82 ha | 36 ha | 118 ha |
| 2003 | 89 ha | 33 ha | 122 ha |
| 2004 | 127 ha | 62 ha | 189 ha |
| 2005 | 94 ha | 26 ha | 120 ha |
| 2006 | 223 ha | 64 ha | 287 ha |
| 2007 | 116 ha | 63 ha | 179 ha |
| 2008 | 217 ha | 50 ha | 267 ha |
| 2009 | 205 ha | 55 ha | 260 ha |
| 2010 | 94 ha | 26 ha | 119 ha |
| 2011 | 47 ha | 25 ha | 72 ha |
| 2012 | 184 ha | 105 ha | 289 ha |
| 2013 | 56 ha | 16 ha | 72 ha |
| 2014 | 70 ha | 17 ha | 87 ha |
| 2015 | 84 ha | 30 ha | 114 ha |
| 2016 | 329 ha | 68 ha | 397 ha |
| 2017 | 171 ha | 36 ha | 207 ha |
| 2018 | 354 ha | 56 ha | 410 ha |
| 2019 | 251 ha | 170 ha | 421 ha |
| 2020 | 223 ha | 84 ha | 307 ha |
| 2021 | 215 ha | 92 ha | 307 ha |
| 2022 | 104 ha | 79 ha | 183 ha |
| 2023 | 124 ha | 69 ha | 193 ha |
| 2024 | 125 ha | 41 ha | 166 ha |
| 2025 | 137 ha | 90 ha | 227 ha |
Forest loss is slowing down: about 215 hectares a year in 2021–2025, down from 348 hectares a year in 2016–2020. The worst year was 2019, when about 421 hectares of forest were lost.
What is causing deforestation in Chiba?
- Towns and roadscleared for good51% · 2,690 ha
- Loggingcan grow back20% · 1,070 ha
- Mining and energycleared for good16% · 847 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, 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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