City report · Texas, United States
San Antonio Air quality today
Air quality in San Antonio currently reads AQI 38 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 38
Good
- PM2.5, fine particles (µg/m³)
- 6.9
- tree cover
- 14.7%
- trees in this area
- 46.2K
- more trees needed
- 48.1K
Measured across a 1.2 mi (2 km) radius around Main/Military Plaza, San Antonio, TX, USA (4.9 sq mi), from a satellite image of Oct 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
San Antonio · AQI 38 (Good)
San Antonio's tree count comes to 46,181 trees across 4.9 sq mi (12.57 km²), 15 points below the 30% tree-cover level considered healthy for this area, so roughly 48,066 more trees would close the gap.
Air quality detail
Air quality in San Antonio today: AQI 38, Good
Main pollutant: PM2.5 · Observed Nov 11, 08:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · San Antonio Bulverde, 15.3 mi (24.6 km) away · median of 4 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.9
PM10
12.0
NO₂
—
O₃
5.9
SO₂
—
CO
—
Data: OpenAQ · AirNow
- 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 Antonio's daily AQI at 47 on average, from 15 on Nov 4 to an hourly peak of 69 on Nov 6.
Where San Antonio stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in San Antonio: Critically low
14.7% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).
Trees in this area
46,181
Target trees
94,247
More trees needed
48,066
CO₂ if planted / yr
1,057 t
Deforestation · 2001–2025
How much forest has San Antonio lost?
Since 2001, the area within 10 km of San Antonio has lost about 447 acres (181 hectares) of forest (about 340 football fields): 13% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 447 acres (181 ha)about 340 football fields
- Share of its forest
- 13%of what there was in 2000
- Cleared for good
- 415 acres (168 ha)deforestation: turned into farms, mines or towns
The worst year was 2007, when about 103 acres (42 hectares) of forest were lost.
Acres of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 37 acres (15 ha) | 4 acres (2 ha) | 41 acres (17 ha) |
| 2002 | 22 acres (9 ha) | 3 acres (1 ha) | 25 acres (10 ha) |
| 2003 | 5 acres (2 ha) | under 1 ha | 6 acres (2 ha) |
| 2004 | 13 acres (5 ha) | under 1 ha | 15 acres (6 ha) |
| 2005 | 10 acres (4 ha) | under 1 ha | 11 acres (5 ha) |
| 2006 | 39 acres (16 ha) | under 1 ha | 40 acres (16 ha) |
| 2007 | 95 acres (39 ha) | 8 acres (3 ha) | 103 acres (42 ha) |
| 2008 | 3 acres (1 ha) | under 1 ha | 5 acres (2 ha) |
| 2009 | 29 acres (12 ha) | under 1 ha | 30 acres (12 ha) |
| 2010 | 8 acres (3 ha) | 2 acres (1 ha) | 10 acres (4 ha) |
| 2011 | 31 acres (13 ha) | 4 acres (2 ha) | 35 acres (14 ha) |
| 2012 | 29 acres (12 ha) | under 1 ha | 31 acres (13 ha) |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 4 acres (2 ha) | under 1 ha | 4 acres (2 ha) |
| 2015 | 12 acres (5 ha) | under 1 ha | 12 acres (5 ha) |
| 2016 | 15 acres (6 ha) | under 1 ha | 16 acres (7 ha) |
| 2017 | 16 acres (7 ha) | under 1 ha | 17 acres (7 ha) |
| 2018 | 5 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2019 | 5 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | 5 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2022 | 24 acres (10 ha) | under 1 ha | 24 acres (10 ha) |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | 3 acres (1 ha) | under 1 ha | 3 acres (1 ha) |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around San Antonio?
- Towns and roadscleared for good81% · 361 acres (146 ha)
- Farms, pasture and plantationscleared for good13% · 56 acres (23 ha)
- Unknown causescause unknown6.8% · 30 acres (12 ha)
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
- 7,650 acres (3,100 ha)
- Forest in 2020
- 7,660 acres (3,100 ha)
- Overall change
- +7 acres (3 ha)more forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around San Antonio stayed about the same size, at about 7,660 acres (3,100 hectares): new forest grew on about 185 acres (75 hectares), and about 179 acres (73 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 San Antonio
Same 2 km radius, same index — so they compare directly.
- Round Rock143.9 km
United States
- Tree cover
- 33%
- Air quality
- 44
- Killeen202.1 km
United States
- Tree cover
- 26%
- Air quality
- 11
- Corpus Christi209.9 km
United States
- Tree cover
- 10%
- Air quality
- 18
- Piedras Negras213.1 km
Mexico
- Tree cover
- 13%
- Air quality
- 49
- Laredo235.1 km
United States
- Tree cover
- 15%
- Air quality
- 47
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Frequently asked
Questions about San Antonio
What is the air quality (AQI) in San Antonio right now?
The latest reading for San Antonio shows an AQI of 38 (Good), measured Nov 11, 08:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is San Antonio Bulverde, 15.3 mi (24.6 km) away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in San Antonio today?
At AQI 38 (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 Antonio been like this week?
Over the last 7 days, the CAMS air-quality model put San Antonio's daily AQI at 47 on average, from 15 on Nov 4 to an hourly peak of 69 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around San Antonio lost since 2001?
Since 2001, the area within 10 km of San Antonio has lost about 447 acres (181 hectares) of forest (about 340 football fields): 13% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around San Antonio stayed about the same size, at about 7,660 acres (3,100 hectares): new forest grew on about 185 acres (75 hectares), and about 179 acres (73 hectares) were lost.
What is the tree count in San Antonio?
San Antonio has an estimated 46,181 trees across the 4.9 sq mi (12.57 km²) measured — 14.7% tree cover, 15 percentage points short of the 30% tree-cover target set for this area.
How many more trees does San Antonio need?
San Antonio needs roughly 48,066 more trees to close a 15-point shortfall against its 30% tree-cover target — about 1,057 t of extra CO₂ absorbed per year once grown.
How are San Antonio's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Main/Military Plaza, 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 1.2 mi (2 km) radius around Main/Military Plaza; the tree count is an estimate derived from that cover.
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