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City report · California, United States

Anaheim Air quality today

Air quality in Anaheim currently reads AQI 57 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

Air quality right now

AQI 57

Moderate

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
12.2
tree cover
10.6%
trees in this area
33.3K
more trees needed
60.9K

Measured across a 1.2 mi (2 km) radius around Downtown Anaheim, Anaheim, CA 92805, 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.

Anaheim · AQI 57 (Moderate)

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

Anaheim's tree count comes to 33,301 trees across 4.9 sq mi (12.57 km²), 19 points below the 30% tree-cover level considered healthy for this area, so roughly 60,947 more trees would close the gap.

Air quality detail

Air quality in Anaheim today: AQI 57, Moderate

Main pollutant: PM2.5 · Observed Nov 11, 06:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.

Ground station · Anaheim, 1.4 mi (2.3 km) away · median of 2 stations

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

12.2

PM10

28.0

NO₂

68.2

O₃

0.0

SO₂

—

CO

916.5

Data: OpenAQ · AirNow

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 Anaheim's daily AQI at 52 on average, from 42 on Nov 6 to an hourly peak of 79 on Nov 4.

Last 7 days · model estimateavg 52 · peak 79
Nov 3: AQI 57 (peak 78)Nov 4: AQI 63 (peak 79)Nov 5: AQI 54 (peak 69)Nov 6: AQI 42 (peak 63)Nov 7: AQI 44 (peak 57)Nov 8: AQI 43 (peak 65)Nov 9: AQI 62 (peak 65)
Nov 3Nov 9

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

Tree cover detail

Tree cover in Anaheim: Critically low

10.6% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).

19 points below target

Trees in this area

33,301

Target trees

94,248

More trees needed

60,947

CO₂ if planted / yr

1,341 t

Deforestation · 2001–2025

How much forest has Anaheim lost?

There was very little forest around Anaheim in 2000, about 48 acres (20 hectares), and about 11 acres (5 hectares) of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.

Satellite image of the area around Anaheim, June 2017

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

The worst year was 2016, when about 5 acres (2 hectares) of forest were lost.

Forest lost each year around Anaheim, 2001–2025

Acres of forest lost each year

Forest lost each year around Anaheim, 2001–2025. Use the left and right arrow keys to read each year.4.94

Show the figures as a table
Forest lost each year around Anaheim, 2001–2025
YearCleared for goodCan grow backTotal
2001under 1 haunder 1 haunder 1 ha
2002under 1 haunder 1 haunder 1 ha
2003under 1 haunder 1 haunder 1 ha
2004under 1 haunder 1 haunder 1 ha
2005under 1 haunder 1 haunder 1 ha
2006under 1 haunder 1 haunder 1 ha
2007under 1 haunder 1 haunder 1 ha
2008under 1 haunder 1 haunder 1 ha
2009under 1 haunder 1 haunder 1 ha
2010under 1 haunder 1 haunder 1 ha
2011under 1 haunder 1 haunder 1 ha
2012under 1 haunder 1 haunder 1 ha
2013under 1 haunder 1 haunder 1 ha
2014under 1 haunder 1 haunder 1 ha
2015under 1 haunder 1 haunder 1 ha
20165 acres (2 ha)under 1 ha5 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 Anaheim?

  • Towns and roadscleared for good67% · 7 acres (3 ha)
  • Unknown causescause unknown33% · 4 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
3,020 acres (1,220 ha)
Forest in 2020
3,340 acres (1,350 ha)
Overall change
+314 acres (127 ha)more forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Anaheim grew from about 3,020 acres (1,220 hectares) to 3,340 acres (1,350 hectares), a net gain of about 314 acres (127 hectares) (+10%). New forest grew on about 326 acres (132 hectares), while 11 acres (4 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 Anaheim

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

  • Irvine

    United States

    20.3 km
    Tree cover
    28%
    Air quality
    24
  • Huntington Beach

    United States

    21.0 km
    Tree cover
    9%
    Air quality
    66
  • Downey

    United States

    23.3 km
    Tree cover
    11%
    Air quality
    55
  • West Covina

    United States

    26.0 km
    Tree cover
    12%
    Air quality
    17
  • Long Beach

    United States

    26.5 km
    Tree cover
    6%
    Air quality
    75
  • El Monte

    United States

    28.0 km
    Tree cover
    9%
    Air quality
    33

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

Questions about Anaheim

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

The latest reading for Anaheim shows an AQI of 57 (Moderate), measured Nov 11, 06:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Anaheim, 1.4 mi (2.3 km) away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.

Is it safe to exercise outside in Anaheim today?

At AQI 57 (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 Anaheim been like this week?

Over the last 7 days, the CAMS air-quality model put Anaheim's daily AQI at 52 on average, from 42 on Nov 6 to an hourly peak of 79 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 Anaheim lost since 2001?

There was very little forest around Anaheim in 2000, about 48 acres (20 hectares), and about 11 acres (5 hectares) of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Anaheim grew from about 3,020 acres (1,220 hectares) to 3,340 acres (1,350 hectares), a net gain of about 314 acres (127 hectares) (+10%). New forest grew on about 326 acres (132 hectares), while 11 acres (4 hectares) were lost.

What is the tree count in Anaheim?

Anaheim has an estimated 33,301 trees across the 4.9 sq mi (12.57 km²) measured — 10.6% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.

How many more trees does Anaheim need?

Anaheim needs roughly 60,947 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,341 t of extra CO₂ absorbed per year once grown.

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

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

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