The Netherlands · North Holland · 4 cities
Air quality in North Holland today The AQI right now, city by city
Right now, Hoofddorp has the cleanest air of the 4 cities we track in North Holland (AQI 66, Moderate), and Zaanstad the worst (AQI 74, Moderate). Haarlem has the most tree cover, at 24.7% — #20 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 70
Average right now
Moderate
- cities tracked
- 4
- average tree cover
- 22.8%
- The Netherlands: 28.1%
- worst air now: Zaanstad
- 74
- cleanest air now: Hoofddorp
- 66
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
North Holland · average AQI 70
Air quality today across North Holland, city by city
| Amsterdam | 71Moderate | 20.5% | 25.7K | #25 of 25 |
|---|---|---|---|---|
| Haarlem | 70Moderate | 24.7% | 16.4K | #20 of 25 |
| Zaanstad | 74Moderate | 22.8% | 21.3K | #23 of 25 |
| Hoofddorp | 66Moderate | 23.2% | 21.4K | #22 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 North Holland lost?
Since 2001, North Holland has lost about 1,200 hectares of forest (about 1,700 football pitches): 3% of the forest it had in 2000. Most of it (54%) was deforestation, forest cleared for good, mainly for towns and roads.
- Forest lost since 2001
- 1,200 haabout 1,700 football pitches
- Share of its forest
- 3%of what there was in 2000
- Cleared for good
- 651 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 | 12 ha | 21 ha | 33 ha |
| 2002 | 10 ha | 11 ha | 22 ha |
| 2003 | 8 ha | 10 ha | 19 ha |
| 2004 | 11 ha | 16 ha | 28 ha |
| 2005 | 15 ha | 12 ha | 27 ha |
| 2006 | 10 ha | 12 ha | 22 ha |
| 2007 | 19 ha | 22 ha | 40 ha |
| 2008 | 23 ha | 14 ha | 37 ha |
| 2009 | 23 ha | 29 ha | 52 ha |
| 2010 | 45 ha | 66 ha | 111 ha |
| 2011 | 54 ha | 61 ha | 115 ha |
| 2012 | 17 ha | 22 ha | 39 ha |
| 2013 | 8 ha | 13 ha | 20 ha |
| 2014 | 25 ha | 19 ha | 44 ha |
| 2015 | 14 ha | 17 ha | 32 ha |
| 2016 | 36 ha | 16 ha | 52 ha |
| 2017 | 48 ha | 17 ha | 65 ha |
| 2018 | 39 ha | 22 ha | 61 ha |
| 2019 | 41 ha | 80 ha | 121 ha |
| 2020 | 33 ha | 14 ha | 47 ha |
| 2021 | 69 ha | 13 ha | 82 ha |
| 2022 | 10 ha | 10 ha | 20 ha |
| 2023 | 29 ha | 10 ha | 39 ha |
| 2024 | 47 ha | 12 ha | 59 ha |
| 2025 | 7 ha | 6 ha | 14 ha |
Forest loss is slowing down: about 43 hectares a year in 2021–2025, down from 69 hectares a year in 2016–2020. The worst year was 2019, when about 121 hectares of forest were lost.
What is causing deforestation in North Holland?
- Loggingcan grow back35% · 420 ha
- Towns and roadscleared for good35% · 416 ha
- Mining and energycleared for good16% · 187 ha
Also: farms, pasture and plantations, wildfires, 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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