City report · Arizona, United States
Glendale Air quality today
Air quality in Glendale currently reads AQI 67 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 67
Moderate
- PM2.5, fine particles (µg/m³)
- 17.9
- tree cover
- 5.2%
- trees in this area
- 16.3K
- more trees needed
- 77.9K
Measured across a 1.2 mi (2 km) radius around Glendale, AZ, USA (4.9 sq mi), from a satellite image of Sep 13, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Glendale · AQI 67 (Moderate)
Glendale's tree count comes to 16,336 trees across 4.9 sq mi (12.57 km²), 25 points below the 30% tree-cover level considered healthy for this area, so roughly 77,911 more trees would close the gap.
Air quality detail
Air quality in Glendale today: AQI 67, 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 · West Phoenix, 4.5 mi (7.3 km) away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
17.9
PM10
—
NO₂
33.7
O₃
2.9
SO₂
1.3
CO
859.2
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 Glendale's daily AQI at 55 on average, from 44 on Nov 7 to an hourly peak of 97 on Nov 4.
Where Glendale stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Glendale: Critically low
5.2% tree cover against a 30% healthy-neighborhood target, across 4.9 sq mi (12.57 km²).
Trees in this area
16,336
Target trees
94,247
More trees needed
77,911
CO₂ if planted / yr
1,714 t
Deforestation · 2001–2025
How much forest has Glendale lost?
There was almost no forest around Glendale in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
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. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Glendale
Same 2 km radius, same index — so they compare directly.
- Phoenix14.4 km
United States
- Tree cover
- 3%
- Air quality
- 67
- Deer Valley16.8 km
United States
- Tree cover
- 2%
- Air quality
- 53
- Surprise17.0 km
United States
- Tree cover
- 2%
- Air quality
- 82
- Scottsdale26.8 km
United States
- Tree cover
- 8%
- Air quality
- 36
- Tempe29.1 km
United States
- Tree cover
- 4%
- Air quality
- 26
- Mesa36.1 km
United States
- Tree cover
- 10%
- Air quality
- 36
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Frequently asked
Questions about Glendale
What is the air quality (AQI) in Glendale right now?
The latest reading for Glendale shows an AQI of 67 (Moderate), measured Nov 11, 07:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is West Phoenix, 4.5 mi (7.3 km) away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Glendale today?
At AQI 67 (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 Glendale been like this week?
Over the last 7 days, the CAMS air-quality model put Glendale's daily AQI at 55 on average, from 44 on Nov 7 to an hourly peak of 97 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 Glendale lost since 2001?
There was almost no forest around Glendale in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
What is the tree count in Glendale?
Glendale has an estimated 16,336 trees across the 4.9 sq mi (12.57 km²) measured — 5.2% tree cover, 25 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Glendale need?
Glendale needs roughly 77,911 more trees to close a 25-point shortfall against its 30% tree-cover target — about 1,714 t of extra CO₂ absorbed per year once grown.
How are Glendale's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Glendale, 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 Glendale; the tree count is an estimate derived from that cover.
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