City report · Texas, United States
Pasadena Air quality today
Air quality in Pasadena currently reads AQI 44 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 44
Good
- PM2.5, fine particles (µg/m³)
- 7.9
- tree cover
- 37.9%
- trees in this area
- 119K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around Pasadena, TX, USA (4.9 sq mi), from a satellite image of Oct 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Pasadena · AQI 44 (Good)
Pasadena's tree count comes to 119,066 trees across 4.9 sq mi (12.57 km²), already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Pasadena today: AQI 44, 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 · Houston Deer Park C3, 5.0 mi (8.1 km) away · median of 5 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.9
PM10
12.0
NO₂
—
O₃
3.9
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 Pasadena's daily AQI at 76 on average, from 52 on Nov 8 to an hourly peak of 158 on Nov 5.
Where Pasadena stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Pasadena: Healthy tree cover
37.9% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).
Trees in this area
119,066
Target trees
119,066
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Pasadena lost?
Since 2001, the area within 10 km of Pasadena has lost about 2,380 acres (962 hectares) of forest (about 1,800 football fields): 41% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from October 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 2,380 acres (962 ha)about 1,800 football fields
- Share of its forest
- 41%of what there was in 2000
- Cleared for good
- 2,360 acres (955 ha)deforestation: turned into farms, mines or towns
Forest loss is speeding up: about 152 acres (61 hectares) a year in 2021–2025, up from 73 acres (29 hectares) a year in 2016–2020. The worst year was 2008, when about 368 acres (149 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 | 18 acres (7 ha) | under 1 ha | 19 acres (8 ha) |
| 2002 | 37 acres (15 ha) | under 1 ha | 38 acres (16 ha) |
| 2003 | 29 acres (12 ha) | under 1 ha | 30 acres (12 ha) |
| 2004 | 56 acres (23 ha) | under 1 ha | 56 acres (23 ha) |
| 2005 | 59 acres (24 ha) | under 1 ha | 59 acres (24 ha) |
| 2006 | 68 acres (27 ha) | under 1 ha | 68 acres (27 ha) |
| 2007 | 35 acres (14 ha) | under 1 ha | 36 acres (14 ha) |
| 2008 | 366 acres (148 ha) | 2 acres (1 ha) | 368 acres (149 ha) |
| 2009 | 11 acres (4 ha) | under 1 ha | 11 acres (5 ha) |
| 2010 | 21 acres (8 ha) | under 1 ha | 22 acres (9 ha) |
| 2011 | 255 acres (103 ha) | 5 acres (2 ha) | 259 acres (105 ha) |
| 2012 | 21 acres (9 ha) | under 1 ha | 23 acres (9 ha) |
| 2013 | 85 acres (34 ha) | under 1 ha | 85 acres (34 ha) |
| 2014 | 91 acres (37 ha) | under 1 ha | 93 acres (38 ha) |
| 2015 | 88 acres (36 ha) | under 1 ha | 89 acres (36 ha) |
| 2016 | 45 acres (18 ha) | under 1 ha | 45 acres (18 ha) |
| 2017 | 157 acres (64 ha) | under 1 ha | 157 acres (64 ha) |
| 2018 | 97 acres (39 ha) | under 1 ha | 98 acres (40 ha) |
| 2019 | 24 acres (10 ha) | under 1 ha | 26 acres (10 ha) |
| 2020 | 37 acres (15 ha) | under 1 ha | 38 acres (15 ha) |
| 2021 | 282 acres (114 ha) | under 1 ha | 282 acres (114 ha) |
| 2022 | 123 acres (50 ha) | under 1 ha | 123 acres (50 ha) |
| 2023 | 73 acres (30 ha) | under 1 ha | 73 acres (30 ha) |
| 2024 | 16 acres (6 ha) | under 1 ha | 16 acres (6 ha) |
| 2025 | 264 acres (107 ha) | under 1 ha | 264 acres (107 ha) |
What is causing deforestation around Pasadena?
- Towns and roadscleared for good73% · 1,740 acres (703 ha)
- Farms, pasture and plantationscleared for good26% · 620 acres (251 ha)
Also: 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
- 19,400 acres (7,850 ha)
- Forest in 2020
- 18,500 acres (7,470 ha)
- Overall change
- −939 acres (380 ha)less forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Pasadena shrank from about 19,400 acres (7,850 hectares) to 18,500 acres (7,470 hectares), a net loss of about 939 acres (380 hectares) (−4.8%). New forest grew on about 744 acres (301 hectares), but 1,680 acres (680 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 Pasadena
Same 2 km radius, same index — so they compare directly.
- Pearland16.0 km
United States
- Tree cover
- 34%
- Air quality
- 81
- Houston16.9 km
United States
- Tree cover
- 16%
- Air quality
- 62
- League City23.2 km
United States
- Tree cover
- 48%
- Air quality
- 62
- Alief37.5 km
United States
- Tree cover
- 28%
- Air quality
- 76
- Cypress56.3 km
United States
- Tree cover
- 36%
- Air quality
- 71
- Beaumont115.4 km
United States
- Tree cover
- 37%
- Air quality
- 71
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Frequently asked
Questions about Pasadena
What is the air quality (AQI) in Pasadena right now?
The latest reading for Pasadena shows an AQI of 44 (Good), measured Nov 11, 08:00 local time by 5 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Houston Deer Park C3, 5.0 mi (8.1 km) away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Pasadena today?
At AQI 44 (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 Pasadena been like this week?
Over the last 7 days, the CAMS air-quality model put Pasadena's daily AQI at 76 on average, from 52 on Nov 8 to an hourly peak of 158 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 Pasadena lost since 2001?
Since 2001, the area within 10 km of Pasadena has lost about 2,380 acres (962 hectares) of forest (about 1,800 football fields): 41% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is speeding up: about 152 acres (61 hectares) a year in 2021–2025, up from 73 acres (29 hectares) a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Pasadena shrank from about 19,400 acres (7,850 hectares) to 18,500 acres (7,470 hectares), a net loss of about 939 acres (380 hectares) (−4.8%). New forest grew on about 744 acres (301 hectares), but 1,680 acres (680 hectares) were lost.
What is the tree count in Pasadena?
Pasadena has an estimated 119,066 trees across the 4.9 sq mi (12.57 km²) measured — 37.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Pasadena need?
Pasadena has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Pasadena's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Pasadena, 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 Pasadena; the tree count is an estimate derived from that cover.
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