The Netherlands · South Holland · 5 cities
Air quality in South Holland today The AQI right now, city by city
Right now, Rotterdam has the cleanest air of the 5 cities we track in South Holland (AQI 72, Moderate), and Leiden the worst (AQI 121, Unhealthy for sensitive groups). Zoetermeer has the most tree cover, at 32.2% — #4 of 25 cities measured in The Netherlands.
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 91
Average right now
Moderate
- cities tracked
- 5
- average tree cover
- 28.0%
- The Netherlands: 28.1%
- worst air now: Leiden
- 121
- cleanest air now: Rotterdam
- 72
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
South Holland · average AQI 91
Air quality today across South Holland, city by city
| Rotterdam | 72Moderate | 25.9% | 11.4K | #17 of 25 |
|---|---|---|---|---|
| The Hague | 74Moderate | 21.7% | 26.0K | #24 of 25 |
| Leiden | 121Unhealthy for sensitive groups | 30.0% | 15.6K | #11 of 25 |
| Dordrecht | 75Moderate | 30.4% | — | #9 of 25 |
| Zoetermeer | 111Unhealthy for sensitive groups | 32.2% | 8.8K | #4 of 25 |
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 The Netherlands.
Deforestation · 2001–2025
How much forest has South Holland lost?
Since 2001, South Holland has lost about 573 hectares of forest (about 800 football pitches): 1.8% of the forest it had in 2000. Most of it (62%) was deforestation, forest cleared for good, mainly for towns and roads.
- Forest lost since 2001
- 573 haabout 800 football pitches
- Share of its forest
- 1.8%of what there was in 2000
- Cleared for good
- 353 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 | 8 ha | 7 ha | 15 ha |
| 2002 | 6 ha | 8 ha | 14 ha |
| 2003 | 12 ha | 2 ha | 14 ha |
| 2004 | 3 ha | 2 ha | 5 ha |
| 2005 | 16 ha | 7 ha | 23 ha |
| 2006 | 13 ha | 5 ha | 18 ha |
| 2007 | 11 ha | 9 ha | 20 ha |
| 2008 | 16 ha | 18 ha | 33 ha |
| 2009 | 9 ha | 9 ha | 18 ha |
| 2010 | 15 ha | 10 ha | 25 ha |
| 2011 | 9 ha | 2 ha | 11 ha |
| 2012 | 14 ha | 13 ha | 27 ha |
| 2013 | 5 ha | 1 ha | 6 ha |
| 2014 | 6 ha | 7 ha | 13 ha |
| 2015 | 5 ha | 4 ha | 9 ha |
| 2016 | 18 ha | 4 ha | 22 ha |
| 2017 | 27 ha | 14 ha | 41 ha |
| 2018 | 20 ha | 4 ha | 24 ha |
| 2019 | 39 ha | 12 ha | 51 ha |
| 2020 | 27 ha | 10 ha | 36 ha |
| 2021 | 29 ha | 26 ha | 55 ha |
| 2022 | 9 ha | 6 ha | 15 ha |
| 2023 | 23 ha | 14 ha | 37 ha |
| 2024 | 12 ha | 19 ha | 31 ha |
| 2025 | 4 ha | 8 ha | 12 ha |
The worst year was 2021, when about 55 hectares of forest were lost.
What is causing deforestation in South Holland?
- Towns and roadscleared for good51% · 295 ha
- Loggingcan grow back23% · 132 ha
- Farms, pasture and plantationscleared for good7% · 40 ha
Also: mining and energy, 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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