City report · Basque Country, Spain
Donostia / San Sebastián Air quality today
Air quality in Donostia / San Sebastián currently reads AQI 31 (Good): Air quality is satisfactory for everyone.
AQI 31
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 2.0
- tree cover
- 40.0%
- trees in this area
- 110K
- more trees needed
- 0
Measured across a 2 km radius around Egia, Donostia / San Sebastián, Gipuzkoa, Spain (12.57 km²), from a satellite image of Sep 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Donostia / San Sebastián · AQI 31 (Good)
Donostia / San Sebastián's tree count comes to 110,458 trees across 11.05 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Donostia / San Sebastián today: AQI 31, Good
Main pollutant: Ozone · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · EASO, 500 m away · median of 7 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.0
PM10
4.5
NO₂
9.0
O₃
66.0
SO₂
4.0
CO
180.0
Data: OpenAQ · EEA
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Donostia / San Sebastián's daily AQI at 35 on average, from 11 on Nov 11 to an hourly peak of 65 on Nov 5.
Where Donostia / San Sebastián stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Donostia / San Sebastián: Healthy tree cover
40.0% tree cover against a 30% healthy-neighborhood target, across 11.05 km² of land.
Trees in this area
110,458
Target trees
110,458
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Donostia / San Sebastián lost?
Since 2001, the area within 10 km of Donostia / San Sebastián has lost about 1,170 hectares of forest (about 1,600 football pitches): 10% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 470 hectares (40%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southwest of the city center.
- Forest lost since 2001
- 1,170 haabout 1,600 football pitches
- Share of its forest
- 10%of what there was in 2000
- Cleared for good
- 470 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 112 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 34 ha | 36 ha | 69 ha |
| 2002 | 19 ha | 9 ha | 28 ha |
| 2003 | 29 ha | 32 ha | 61 ha |
| 2004 | 20 ha | 28 ha | 48 ha |
| 2005 | 12 ha | 25 ha | 37 ha |
| 2006 | 7 ha | 41 ha | 48 ha |
| 2007 | 49 ha | 63 ha | 112 ha |
| 2008 | 49 ha | 36 ha | 85 ha |
| 2009 | 17 ha | 33 ha | 50 ha |
| 2010 | 37 ha | 41 ha | 78 ha |
| 2011 | 57 ha | 21 ha | 78 ha |
| 2012 | 14 ha | 22 ha | 35 ha |
| 2013 | 13 ha | 17 ha | 30 ha |
| 2014 | 15 ha | 40 ha | 55 ha |
| 2015 | 1 ha | 9 ha | 10 ha |
| 2016 | 6 ha | 19 ha | 25 ha |
| 2017 | 14 ha | 22 ha | 36 ha |
| 2018 | 17 ha | 21 ha | 39 ha |
| 2019 | 15 ha | 20 ha | 35 ha |
| 2020 | 9 ha | 35 ha | 44 ha |
| 2021 | 8 ha | 21 ha | 29 ha |
| 2022 | 6 ha | 29 ha | 35 ha |
| 2023 | 2 ha | 16 ha | 18 ha |
| 2024 | 12 ha | 23 ha | 35 ha |
| 2025 | 8 ha | 47 ha | 56 ha |
What is causing deforestation around Donostia / San Sebastián?
- Loggingcan grow back60% · 700 ha
- Towns and roadscleared for good36% · 422 ha
- Farms, pasture and plantationscleared for good3.2% · 38 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.
Forest gained and lost, 2000–2020
- Forest in 2000
- 11,700 ha
- Forest in 2020
- 11,400 ha
- Overall change
- −278 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Donostia / San Sebastián shrank from about 11,700 hectares to 11,400 hectares, a net loss of about 278 hectares (−2.4%). New forest grew on about 282 hectares, but 560 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
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. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Donostia / San Sebastián
Same 2 km radius, same index — so they compare directly.
Build your own
Compare Donostia / San Sebastián with anywhere
This place
Donostia / San Sebastián
Use this data
Put Donostia / San Sebastián's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Donostia / San Sebastián
What is the air quality (AQI) in Donostia / San Sebastián right now?
The latest reading for Donostia / San Sebastián shows an AQI of 31 (Good), measured Nov 11, 17:00 local time by 7 ground monitoring stations via OpenAQ (the median of their readings; the nearest is EASO, 500 m away). The main pollutant is Ozone. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Donostia / San Sebastián today?
At AQI 31 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Donostia / San Sebastián been like this week?
Over the last 7 days, the CAMS air-quality model put Donostia / San Sebastián's daily AQI at 35 on average, from 11 on Nov 11 to an hourly peak of 65 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Donostia / San Sebastián lost since 2001?
Since 2001, the area within 10 km of Donostia / San Sebastián has lost about 1,170 hectares of forest (about 1,600 football pitches): 10% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 470 hectares (40%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Donostia / San Sebastián shrank from about 11,700 hectares to 11,400 hectares, a net loss of about 278 hectares (−2.4%). New forest grew on about 282 hectares, but 560 hectares were lost.
What is the tree count in Donostia / San Sebastián?
Donostia / San Sebastián has an estimated 110,458 trees across the 11.05 km² of land measured — 40.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Donostia / San Sebastián need?
Donostia / San Sebastián has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Donostia / San Sebastián's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Egia, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Egia; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address