City report · California, United States
Riverside Air quality today
Air quality in Riverside currently reads AQI 38 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 38
Good
- PM2.5, fine particles (µg/m³)
- 5.2
- tree cover
- 21.7%
- trees in this area
- 68.2K
- more trees needed
- 26.1K
Measured across a 1.2 mi (2 km) radius around Magnolia Center, Riverside, 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.
Riverside · AQI 38 (Good)
Riverside's tree count comes to 68,173 trees across 4.9 sq mi (12.57 km²), 8 points below the 30% tree-cover level considered healthy for this area, so roughly 26,075 more trees would close the gap.
Air quality detail
Air quality in Riverside today: AQI 38, Good
Main pollutant: PM10 · Observed Nov 11, 06:06 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 4001 Iowa Ave Riverside CA, 3.4 mi (5.4 km) away · median of 4 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.2
PM10
41.0
NO₂
58.9
O₃
—
SO₂
0.5
CO
801.9
Data: OpenAQ · AirNow, Clarity
- 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 Riverside's daily AQI at 41 on average, from 31 on Nov 6 to an hourly peak of 89 on Nov 4.
Where Riverside stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Riverside: Below target
21.7% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).
Trees in this area
68,173
Target trees
94,248
More trees needed
26,075
CO₂ if planted / yr
573.6 t
Deforestation · 2001–2025
How much forest has Riverside lost?
Since 2001, the area within 10 km of Riverside has lost about 377 acres (152 hectares) of forest (about 280 football fields): 51% of the forest it had in 2000. Most of it (98%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 377 acres (152 ha)about 280 football fields
- Share of its forest
- 51%of what there was in 2000
- Cleared for good
- 371 acres (150 ha)deforestation: turned into farms, mines or towns
The worst year was 2004, when about 77 acres (31 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 | 48 acres (19 ha) | under 1 ha | 48 acres (19 ha) |
| 2002 | 48 acres (20 ha) | under 1 ha | 49 acres (20 ha) |
| 2003 | 23 acres (9 ha) | under 1 ha | 24 acres (10 ha) |
| 2004 | 75 acres (30 ha) | 2 acres (1 ha) | 77 acres (31 ha) |
| 2005 | 50 acres (20 ha) | under 1 ha | 51 acres (21 ha) |
| 2006 | 25 acres (10 ha) | under 1 ha | 25 acres (10 ha) |
| 2007 | 33 acres (13 ha) | under 1 ha | 33 acres (13 ha) |
| 2008 | 9 acres (4 ha) | under 1 ha | 9 acres (4 ha) |
| 2009 | 20 acres (8 ha) | under 1 ha | 21 acres (8 ha) |
| 2010 | 16 acres (6 ha) | under 1 ha | 16 acres (6 ha) |
| 2011 | 10 acres (4 ha) | under 1 ha | 10 acres (4 ha) |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | 6 acres (2 ha) | under 1 ha | 6 acres (2 ha) |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 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 Riverside?
- Towns and roadscleared for good61% · 230 acres (93 ha)
- Farms, pasture and plantationscleared for good37% · 141 acres (57 ha)
- Unknown causescause unknown1.7% · 6 acres (3 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
- 3,620 acres (1,460 ha)
- Forest in 2020
- 3,310 acres (1,340 ha)
- Overall change
- −309 acres (125 ha)less forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Riverside shrank from about 3,620 acres (1,460 hectares) to 3,310 acres (1,340 hectares), a net loss of about 309 acres (125 hectares) (−8.5%). New forest grew on about 284 acres (115 hectares), but 593 acres (240 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 Riverside
Same 2 km radius, same index — so they compare directly.
- Moreno Valley15.4 km
United States
- Tree cover
- 6%
- Air quality
- 25
- Fontana15.8 km
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- Tree cover
- 8%
- Air quality
- 29
- Corona17.9 km
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- Tree cover
- 9%
- Air quality
- 59
- San Bernardino19.8 km
United States
- Tree cover
- 6%
- Air quality
- 35
- Rancho Cucamonga24.9 km
United States
- Tree cover
- 13%
- Air quality
- 37
- Pomona34.7 km
United States
- Tree cover
- 13%
- Air quality
- 49
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Frequently asked
Questions about Riverside
What is the air quality (AQI) in Riverside right now?
The latest reading for Riverside shows an AQI of 38 (Good), measured Nov 11, 06:06 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 4001 Iowa Ave Riverside CA, 3.4 mi (5.4 km) away). The main pollutant is PM10. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Riverside 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 Riverside been like this week?
Over the last 7 days, the CAMS air-quality model put Riverside's daily AQI at 41 on average, from 31 on Nov 6 to an hourly peak of 89 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 Riverside lost since 2001?
Since 2001, the area within 10 km of Riverside has lost about 377 acres (152 hectares) of forest (about 280 football fields): 51% of the forest it had in 2000. Most of it (98%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Riverside shrank from about 3,620 acres (1,460 hectares) to 3,310 acres (1,340 hectares), a net loss of about 309 acres (125 hectares) (−8.5%). New forest grew on about 284 acres (115 hectares), but 593 acres (240 hectares) were lost.
What is the tree count in Riverside?
Riverside has an estimated 68,173 trees across the 4.9 sq mi (12.57 km²) measured — 21.7% tree cover, 8 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Riverside need?
Riverside needs roughly 26,075 more trees to close a 8-point shortfall against its 30% tree-cover target — about 573.6 t of extra CO₂ absorbed per year once grown.
How are Riverside's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Magnolia Center, 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 Magnolia Center; the tree count is an estimate derived from that cover.
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