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City report · California, United States

Oceanside Air quality today

Air quality in Oceanside currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

Air quality right now

AQI 51

Moderate

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
9.2
tree cover
10.1%
trees in this area
20.9K
more trees needed
41.1K

Measured across a 1.2 mi (2 km) radius around Townsite, Oceanside, CA 92054, 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.

Oceanside · AQI 51 (Moderate)

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

Oceanside's tree count comes to 20,878 trees across 3.2 sq mi (8.27 km²) of land, 20 points below the 30% tree-cover level considered healthy for this area, so roughly 41,137 more trees would close the gap.

Air quality detail

Air quality in Oceanside today: AQI 51, Moderate

Main pollutant: PM2.5 · Observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 65 km, US EPA index. Values in µg/m³.

Estimate · model corrected with 5 station cities within 40.4 mi (65 km), e.g. Escondido and Temecula

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

9.2

PM10

18.5

NO₂

58.0

O₃

3.0

SO₂

2.2

CO

324.0

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 Oceanside's daily AQI at 39 on average, from 31 on Nov 6 to an hourly peak of 79 on Nov 4.

Last 7 daysavg 39 · peak 79
Nov 4: AQI 55 (peak 79)Nov 5: AQI 50 (peak 68)Nov 6: AQI 31 (peak 61)Nov 7: AQI 33 (peak 55)Nov 8: AQI 33 (peak 58)Nov 9: AQI 33 (peak 57)Nov 10: AQI 41 (peak 65)
Nov 4Nov 10

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

Tree cover detail

Tree cover in Oceanside: Critically low

10.1% tree cover against a 30% healthy-neighborhood target, across 3.2 sq mi (8.27 km²) of land.

20 points below target

Trees in this area

20,878

Target trees

62,015

More trees needed

41,137

CO₂ if planted / yr

905.0 t

Deforestation · 2001–2025

How much forest has Oceanside lost?

Since 2001, the area within 10 km of Oceanside has lost about 203 acres (82 hectares) of forest (about 150 football fields): 12% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 21 acres (8 hectares) (10%) was deforestation: forest cleared for good for farms, mines or towns.

Satellite image of the area around Oceanside, September 2017

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

Forest lost since 2001
203 acres (82 ha)about 150 football fields
Share of its forest
12%of what there was in 2000
Cleared for good
21 acres (8 ha)deforestation: turned into farms, mines or towns

The worst year was 2014, when about 116 acres (47 hectares) of forest were lost, mostly to wildfires.

Forest lost each year around Oceanside, 2001–2025

Acres of forest lost each year

Forest lost each year around Oceanside, 2001–2025. Use the left and right arrow keys to read each year.116

Show the figures as a table
Forest lost each year around Oceanside, 2001–2025
YearCleared for goodCan grow backTotal
2001under 1 haunder 1 haunder 1 ha
2002under 1 haunder 1 haunder 1 ha
20033 acres (1 ha)3 acres (1 ha)6 acres (3 ha)
20044 acres (2 ha)4 acres (2 ha)8 acres (3 ha)
2005under 1 haunder 1 haunder 1 ha
2006under 1 ha15 acres (6 ha)16 acres (6 ha)
2007under 1 ha20 acres (8 ha)21 acres (8 ha)
2008under 1 ha11 acres (4 ha)12 acres (5 ha)
20093 acres (1 ha)9 acres (4 ha)12 acres (5 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 ha116 acres (47 ha)116 acres (47 ha)
2015under 1 haunder 1 haunder 1 ha
2016under 1 haunder 1 ha2 acres (1 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 ha3 acres (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 Oceanside?

  • Wildfirescan grow back82% · 166 acres (67 ha)
  • Towns and roadscleared for good5.2% · 11 acres (4 ha)
  • Loggingcan grow back4% · 8 acres (3 ha)

Also: mining and energy, farms, pasture and plantations, 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
6,150 acres (2,490 ha)
Forest in 2020
6,600 acres (2,670 ha)
Overall change
+452 acres (183 ha)more forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Oceanside grew from about 6,150 acres (2,490 hectares) to 6,600 acres (2,670 hectares), a net gain of about 452 acres (183 hectares) (+7.4%). New forest grew on about 598 acres (242 hectares), while 146 acres (59 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 Oceanside

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

  • Vista

    United States

    12.8 km
    Tree cover
    14%
    Air quality
    39
  • Escondido

    United States

    28.6 km
    Tree cover
    9%
    Air quality
    20
  • Temecula

    United States

    39.5 km
    Tree cover
    26%
    Air quality
    9
  • Murrieta

    United States

    42.7 km
    Tree cover
    14%
    Air quality
    23
  • San Diego

    United States

    57.0 km
    Tree cover
    7%
    Air quality
    22
  • El Cajon

    United States

    59.2 km
    Tree cover
    4%
    Air quality
    21

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

Questions about Oceanside

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

The latest reading for Oceanside shows an AQI of 51 (Moderate), observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 5 ground-station cities within 65 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.

Is it safe to exercise outside in Oceanside today?

At AQI 51 (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 Oceanside been like this week?

Over the last 7 days, the CAMS air-quality model put Oceanside's daily AQI at 39 on average, from 31 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 Oceanside lost since 2001?

Since 2001, the area within 10 km of Oceanside has lost about 203 acres (82 hectares) of forest (about 150 football fields): 12% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 21 acres (8 hectares) (10%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Oceanside grew from about 6,150 acres (2,490 hectares) to 6,600 acres (2,670 hectares), a net gain of about 452 acres (183 hectares) (+7.4%). New forest grew on about 598 acres (242 hectares), while 146 acres (59 hectares) were lost.

What is the tree count in Oceanside?

Oceanside has an estimated 20,878 trees across the 3.2 sq mi (8.27 km²) of land measured — 10.1% tree cover, 20 percentage points short of the 30% tree-cover target set for this area.

How many more trees does Oceanside need?

Oceanside needs roughly 41,137 more trees to close a 20-point shortfall against its 30% tree-cover target — about 905.0 t of extra CO₂ absorbed per year once grown.

How are Oceanside'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 1.2 mi (2 km) radius around Townsite; the tree count is an estimate derived from that cover.

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