France · Île-de-France · 6 cities
Air quality in Île-de-France today The AQI right now, city by city
Right now, Cergy-Pontoise has the cleanest air of the 6 cities we track in Île-de-France (AQI 28, Good), and Saint-Quentin-en-Yvelines the worst (AQI 36, Good). Saint-Quentin-en-Yvelines has the most tree cover, at 47.8% — #1 of 39 cities measured in France.
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 34
Average right now
Good
- cities tracked
- 6
- average tree cover
- 32.5%
- France: 25.5%
- worst air now: Saint-Quentin-en-Yvelines
- 36
- cleanest air now: Cergy-Pontoise
- 28
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Île-de-France · average AQI 34
Air quality today across Île-de-France, city by city
| Paris | 35Good | 12.6% | 50.8K | #37 of 39 |
|---|---|---|---|---|
| Marne La Vallée | 36Good | 38.8% | — | #4 of 39 |
| Cergy-Pontoise | 28Good | 42.2% | — | #2 of 39 |
| Saint-Quentin-en-Yvelines | 36Good | 47.8% | — | #1 of 39 |
| Boulogne-Billancourt | 35Good | 29.5% | 1.5K | #10 of 39 |
| Argenteuil | 32Good | 24.3% | 16.9K | #21 of 39 |
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 France.
Deforestation · 2001–2025
How much forest has Île-de-France lost?
Since 2001, Île-de-France has lost about 20,500 hectares of forest (about 29,000 football pitches): 8.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2,020 hectares (9.9%) was deforestation: forest cleared for good for farms, mines or towns.
- Forest lost since 2001
- 20,500 haabout 29,000 football pitches
- Share of its forest
- 8.7%of what there was in 2000
- Cleared for good
- 2,020 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 | 26 ha | 184 ha | 210 ha |
| 2002 | 31 ha | 170 ha | 201 ha |
| 2003 | 40 ha | 136 ha | 176 ha |
| 2004 | 68 ha | 324 ha | 392 ha |
| 2005 | 26 ha | 281 ha | 307 ha |
| 2006 | 47 ha | 351 ha | 398 ha |
| 2007 | 20 ha | 332 ha | 352 ha |
| 2008 | 38 ha | 672 ha | 710 ha |
| 2009 | 40 ha | 399 ha | 439 ha |
| 2010 | 31 ha | 373 ha | 404 ha |
| 2011 | 30 ha | 380 ha | 410 ha |
| 2012 | 27 ha | 330 ha | 357 ha |
| 2013 | 29 ha | 300 ha | 329 ha |
| 2014 | 60 ha | 540 ha | 600 ha |
| 2015 | 24 ha | 345 ha | 369 ha |
| 2016 | 50 ha | 818 ha | 868 ha |
| 2017 | 52 ha | 687 ha | 739 ha |
| 2018 | 30 ha | 1,060 ha | 1,090 ha |
| 2019 | 15 ha | 1,590 ha | 1,610 ha |
| 2020 | 38 ha | 1,570 ha | 1,610 ha |
| 2021 | 29 ha | 947 ha | 976 ha |
| 2022 | 20 ha | 500 ha | 520 ha |
| 2023 | 36 ha | 519 ha | 555 ha |
| 2024 | 12 ha | 606 ha | 618 ha |
| 2025 | 1,200 ha | 5,030 ha | 6,230 ha |
Forest loss is speeding up: about 1,780 hectares a year in 2021–2025, up from 1,180 hectares a year in 2016–2020. The worst year was 2025, when about 6,230 hectares of forest were lost.
What is causing deforestation in Île-de-France?
- Loggingcan grow back61% · 12,500 ha
- Wildfirescan grow back16% · 3,200 ha
- Towns and roadscleared for good4.9% · 1,010 ha
Also: farms, pasture and plantations, mining and energy, 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
Other regions in France
Clean-air buying guides
Cleaner air at home in Île-de-France
Picked by tested clean-air delivery rate (CADR), noise and running cost, from independent test labels. No brand pays to be listed.
- The best air purifiers for wildfire smoke and smog
Air purifiers that keep up with wildfire smoke and winter smog, ranked by verified smoke CADR, with the room each one clears on a smoky day.
- The best air purifiers for bedrooms: quiet picks sized for your room
Quiet HEPA air purifiers for bedrooms, compared on what matters at night: noise on the lowest setting (from 20 dB), verified room size and filter cost.
- The best air purifiers under $200
Good HEPA air purifiers under $200 at the makers' own prices, compared on verified clean air, room size and what the filters cost each year.
Your own street