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City report · California, United States

Torrance Air quality today

Air quality in Torrance currently reads AQI 69 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

Air quality right now

AQI 69

Moderate

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
19.0
tree cover
8.3%
trees in this area
26.1K
more trees needed
68.2K

Measured across a 1.2 mi (2 km) radius around Madrona, Torrance, CA, USA (4.9 sq mi), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Torrance · AQI 69 (Moderate)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 14, 2026

Torrance's tree count comes to 26,075 trees across 4.9 sq mi (12.57 km²), 22 points below the 30% tree-cover level considered healthy for this area, so roughly 68,173 more trees would close the gap.

Air quality detail

Air quality in Torrance today: AQI 69, Moderate

Main pollutant: PM2.5 · Observed Nov 11, 07:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.

Ground station · Redondo Beach, 2.8 mi (4.5 km) away · median of 23 stations

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

19.0

PM10

—

NO₂

—

O₃

—

SO₂

—

CO

—

Data: OpenAQ · AirGradient, Clarity, KN6TLE, Davie, J-Patty

Outdoor exercise
Fine for most people; unusually sensitive people should take long or hard exercise easier
Windows
Fine to open; close them if you are sensitive to pollution
Mask
Not needed for most people
Air purifier
Worth running if you are sensitive

Over the last 7 days, the CAMS air-quality model put Torrance's daily AQI at 57 on average, from 46 on Nov 7 to an hourly peak of 83 on Nov 4.

Last 7 days · model estimateavg 57 · peak 83
Nov 4: AQI 67 (peak 83)Nov 5: AQI 57 (peak 69)Nov 6: AQI 47 (peak 65)Nov 7: AQI 46 (peak 58)Nov 8: AQI 52 (peak 62)Nov 9: AQI 60 (peak 74)Nov 10: AQI 70 (peak 78)
Nov 4Nov 10

Where Torrance stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in Torrance: Critically low

8.3% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).

22 points below target

Trees in this area

26,075

Target trees

94,248

More trees needed

68,173

CO₂ if planted / yr

1,500 t

Deforestation · 2001–2025

How much forest has Torrance lost?

Since 2001, the area within 10 km of Torrance has lost about 94 acres (38 hectares) of forest (about 71 football fields): 9.6% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 42 acres (17 hectares) (44%) was deforestation: forest cleared for good for farms, mines or towns.

Satellite image of the area around Torrance, July 2017

2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.

Forest lost since 2001
94 acres (38 ha)about 71 football fields
Share of its forest
9.6%of what there was in 2000
Cleared for good
42 acres (17 ha)deforestation: turned into farms, mines or towns

The worst year was 2009, when about 50 acres (20 hectares) of forest were lost, mostly to wildfires.

Forest lost each year around Torrance, 2001–2025

Acres of forest lost each year

Forest lost each year around Torrance, 2001–2025. Use the left and right arrow keys to read each year.50.4

Show the figures as a table
Forest lost each year around Torrance, 2001–2025
YearCleared for goodCan grow backTotal
2001under 1 haunder 1 haunder 1 ha
2002under 1 haunder 1 ha3 acres (1 ha)
2003under 1 haunder 1 haunder 1 ha
2004under 1 haunder 1 haunder 1 ha
2005under 1 haunder 1 haunder 1 ha
20063 acres (1 ha)under 1 ha3 acres (1 ha)
2007under 1 haunder 1 haunder 1 ha
2008under 1 haunder 1 haunder 1 ha
20094 acres (2 ha)46 acres (19 ha)50 acres (20 ha)
2010under 1 haunder 1 haunder 1 ha
20113 acres (1 ha)under 1 ha3 acres (1 ha)
20124 acres (2 ha)under 1 ha6 acres (3 ha)
2013under 1 haunder 1 haunder 1 ha
2014under 1 haunder 1 haunder 1 ha
201512 acres (5 ha)under 1 ha13 acres (5 ha)
20165 acres (2 ha)under 1 ha6 acres (2 ha)
2017under 1 haunder 1 haunder 1 ha
2018under 1 haunder 1 haunder 1 ha
2019under 1 haunder 1 haunder 1 ha
2020under 1 haunder 1 haunder 1 ha
2021under 1 haunder 1 haunder 1 ha
2022under 1 haunder 1 haunder 1 ha
2023under 1 haunder 1 haunder 1 ha
2024under 1 haunder 1 haunder 1 ha
2025under 1 haunder 1 haunder 1 ha

What is causing deforestation around Torrance?

  • Wildfirescan grow back50% · 47 acres (19 ha)
  • Towns and roadscleared for good44% · 42 acres (17 ha)
  • Unknown causescause unknown5.5% · 5 acres (2 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
5,540 acres (2,240 ha)
Forest in 2020
5,610 acres (2,270 ha)
Overall change
+72 acres (29 ha)more forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Torrance stayed about the same size, at about 5,610 acres (2,270 hectares): new forest grew on about 131 acres (53 hectares), and about 61 acres (25 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 Torrance

Same 2 km radius, same index — so they compare directly.

  • Compton

    United States

    13.0 km
    Tree cover
    7%
    Air quality
    65
  • Inglewood

    United States

    14.0 km
    Tree cover
    11%
    Air quality
    50
  • Long Beach

    United States

    15.9 km
    Tree cover
    6%
    Air quality
    75
  • Downey

    United States

    22.4 km
    Tree cover
    11%
    Air quality
    55
  • Los Angeles

    United States

    25.7 km
    Tree cover
    5%
    Air quality
    39
  • Hollywood

    United States

    29.2 km
    Tree cover
    17%
    Air quality
    37

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Torrance air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Torrance

What is the air quality (AQI) in Torrance right now?

The latest reading for Torrance shows an AQI of 69 (Moderate), measured Nov 11, 07:00 local time by 23 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Redondo Beach, 2.8 mi (4.5 km) away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.

Is it safe to exercise outside in Torrance today?

At AQI 69 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.

What has the air quality in Torrance been like this week?

Over the last 7 days, the CAMS air-quality model put Torrance's daily AQI at 57 on average, from 46 on Nov 7 to an hourly peak of 83 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.

How much forest has the area around Torrance lost since 2001?

Since 2001, the area within 10 km of Torrance has lost about 94 acres (38 hectares) of forest (about 71 football fields): 9.6% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 42 acres (17 hectares) (44%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Torrance stayed about the same size, at about 5,610 acres (2,270 hectares): new forest grew on about 131 acres (53 hectares), and about 61 acres (25 hectares) were lost.

What is the tree count in Torrance?

Torrance has an estimated 26,075 trees across the 4.9 sq mi (12.57 km²) measured — 8.3% tree cover, 22 percentage points short of the 30% tree-cover target set for this area.

How many more trees does Torrance need?

Torrance needs roughly 68,173 more trees to close a 22-point shortfall against its 30% tree-cover target — about 1,500 t of extra CO₂ absorbed per year once grown.

How are Torrance's air quality and tree cover measured?

Air quality is measured by ground monitoring stations near Madrona, 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 Madrona; the tree count is an estimate derived from that cover.

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