City report · Buenos Aires, Argentina
San Nicolás de los Arroyos Air quality today
Air quality in San Nicolás de los Arroyos currently reads AQI 7 (Good): Air quality is satisfactory for everyone.
AQI 7
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 1.3
- tree cover
- 36.1%
- trees in this area
- 108K
- more trees needed
- 0
Measured across a 2 km radius around San Nicolás de los Arroyos, Buenos Aires Province, Argentina (12.57 km²), from a satellite image of Mar 11, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
San Nicolás de los Arroyos · AQI 7 (Good)
San Nicolás de los Arroyos's tree count comes to 107,854 trees across 11.95 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in San Nicolás de los Arroyos today: AQI 7, Good
Main pollutant: PM2.5 · Observed Nov 10, 15:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 225 km, e.g. Castelar and Gregorio de Laferrère
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.3
PM10
5.9
NO₂
1.0
O₃
79.0
SO₂
0.6
CO
165.0
- 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 San Nicolás de los Arroyos's daily AQI at 30 on average, from 14 on Nov 10 to an hourly peak of 65 on Nov 8.
Where San Nicolás de los Arroyos stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in San Nicolás de los Arroyos: Healthy tree cover
36.1% tree cover against a 30% healthy-neighborhood target, across 11.95 km² of land.
Trees in this area
107,854
Target trees
107,854
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has San Nicolás de los Arroyos lost?
Since 2001, the area within 10 km of San Nicolás de los Arroyos has lost about 62 hectares of forest (about 87 football pitches): 10% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from January 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 62 haabout 87 football pitches
- Share of its forest
- 10%of what there was in 2000
- Cleared for good
- 48 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 37 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 | 33 ha | 4 ha | 37 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 5 ha | 2 ha | 7 ha |
| 2004 | 2 ha | 1 ha | 3 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 2 ha | under 1 ha | 3 ha |
| 2007 | 2 ha | under 1 ha | 3 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | 4 ha | 4 ha |
| 2023 | under 1 ha | under 1 ha | 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around San Nicolás de los Arroyos?
- Farms, pasture and plantationscleared for good76% · 47 ha
- Storms, floods and other natural causescan grow back7.3% · 5 ha
- Unknown causescause unknown15% · 10 ha
Also: towns and roads.
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
- 114 ha
- Forest in 2020
- 136 ha
- Overall change
- +22 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around San Nicolás de los Arroyos grew from about 114 hectares to 136 hectares, a net gain of about 22 hectares (+19%). New forest grew on about 36 hectares, while 13 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
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Frequently asked
Questions about San Nicolás de los Arroyos
What is the air quality (AQI) in San Nicolás de los Arroyos right now?
The latest reading for San Nicolás de los Arroyos shows an AQI of 7 (Good), observed Nov 10, 15:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 225 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in San Nicolás de los Arroyos today?
At AQI 7 (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 San Nicolás de los Arroyos been like this week?
Over the last 7 days, the CAMS air-quality model put San Nicolás de los Arroyos's daily AQI at 30 on average, from 14 on Nov 10 to an hourly peak of 65 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around San Nicolás de los Arroyos lost since 2001?
Since 2001, the area within 10 km of San Nicolás de los Arroyos has lost about 62 hectares of forest (about 87 football pitches): 10% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around San Nicolás de los Arroyos grew from about 114 hectares to 136 hectares, a net gain of about 22 hectares (+19%). New forest grew on about 36 hectares, while 13 hectares were lost.
What is the tree count in San Nicolás de los Arroyos?
San Nicolás de los Arroyos has an estimated 107,854 trees across the 11.95 km² of land measured — 36.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does San Nicolás de los Arroyos need?
San Nicolás de los Arroyos has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are San Nicolás de los Arroyos's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 San Nicolás de los Arroyos; the tree count is an estimate derived from that cover.
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