City report · Sonora, Mexico
Nogales Air quality today
Air quality in Nogales currently reads AQI 93 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 93
Moderate
- PM2.5, fine particles (µg/m³)
- 31.6
- tree cover
- 7.3%
- trees in this area
- 22.9K
- more trees needed
- 71.3K
Measured across a 2 km radius around Altamira, Heroica Nogales, Son., Mexico (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Nogales · AQI 93 (Moderate)
Nogales's tree count comes to 22,934 trees across 12.57 km², 23 points below the 30% tree-cover level considered healthy for this area, so roughly 71,314 more trees would close the gap.
Air quality detail
Air quality in Nogales today: AQI 93, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 08:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Nogales ITN, 2.1 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
31.6
PM10
127.5
NO₂
—
O₃
—
SO₂
—
CO
—
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 Nogales's daily AQI at 15 on average, from 10 on Nov 9 to an hourly peak of 50 on Nov 10.
Where Nogales stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Nogales: Critically low
7.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
22,934
Target trees
94,248
More trees needed
71,314
CO₂ if planted / yr
1,569 t
Deforestation · 2001–2025
How much forest has Nogales lost?
There was almost no forest around Nogales 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.
Forest gained and lost, 2000–2020
- Forest in 2000
- 718 ha
- Forest in 2020
- 731 ha
- Overall change
- +13 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Nogales stayed about the same size, at about 731 hectares: new forest grew on about 13 hectares, and about under 1 hectare was 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 Nogales
Same 2 km radius, same index — so they compare directly.
- Tucson101.5 km
United States
- Tree cover
- 13%
- Air quality
- 33
- Chandler237.6 km
United States
- Tree cover
- 6%
- Air quality
- 36
- Hermosillo246.9 km
Mexico
- Tree cover
- 4%
- Air quality
- 12
- Mesa249.2 km
United States
- Tree cover
- 10%
- Air quality
- 33
- Tempe251.2 km
United States
- Tree cover
- 4%
- Air quality
- 29
- Phoenix260.6 km
United States
- Tree cover
- 3%
- Air quality
- 63
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Frequently asked
Questions about Nogales
What is the air quality (AQI) in Nogales right now?
The latest reading for Nogales shows an AQI of 93 (Moderate), measured Nov 11, 08:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Nogales ITN, 2.1 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Nogales today?
At AQI 93 (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 Nogales been like this week?
Over the last 7 days, the CAMS air-quality model put Nogales's daily AQI at 15 on average, from 10 on Nov 9 to an hourly peak of 50 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Nogales lost since 2001?
There was almost no forest around Nogales 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. Comparing satellite maps from 2000 and 2020, the forest around Nogales stayed about the same size, at about 731 hectares: new forest grew on about 13 hectares, and about under 1 hectare was lost.
What is the tree count in Nogales?
Nogales has an estimated 22,934 trees across the 12.57 km² measured — 7.3% tree cover, 23 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Nogales need?
Nogales needs roughly 71,314 more trees to close a 23-point shortfall against its 30% tree-cover target — about 1,569 t of extra CO₂ absorbed per year once grown.
How are Nogales's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Altamira, 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 2 km radius around Altamira; the tree count is an estimate derived from that cover.
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