City report · Sonora, Mexico
Hermosillo Air quality today
Air quality in Hermosillo currently reads AQI 12 (Good): Air quality is satisfactory for everyone.
AQI 12
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 2.1
- tree cover
- 3.9%
- trees in this area
- 12.3K
- more trees needed
- 82.0K
Measured across a 2 km radius around San Benito, 83190 Hermosillo, 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.
Hermosillo · AQI 12 (Good)
Hermosillo's tree count comes to 12,252 trees across 12.57 km², 26 points below the 30% tree-cover level considered healthy for this area, so roughly 81,996 more trees would close the gap.
Air quality detail
Air quality in Hermosillo today: AQI 12, Good
Main pollutant: PM2.5 · Observed Nov 11, 04:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.1
PM10
3.6
NO₂
7.8
O₃
27.0
SO₂
0.6
CO
109.0
- 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 Hermosillo's daily AQI at 20 on average, from 12 on Nov 11 to an hourly peak of 53 on Nov 5.
Where Hermosillo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hermosillo: Critically low
3.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
12,252
Target trees
94,248
More trees needed
81,996
CO₂ if planted / yr
1,804 t
Deforestation · 2001–2025
How much forest has Hermosillo lost?
There was very little forest around Hermosillo in 2000, about 31 hectares, and about 30 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.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
The worst year was 2002, when about 15 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | 15 ha | under 1 ha | 15 ha |
| 2003 | 1 ha | under 1 ha | 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | 1 ha | under 1 ha | 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 2 ha | under 1 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 9 ha | under 1 ha | 9 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 | under 1 ha | under 1 ha | under 1 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 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Hermosillo?
- Farms, pasture and plantationscleared for goodover 99% · 30 ha
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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 Hermosillo
Same 2 km radius, same index — so they compare directly.
- Heroica Guaymas130.1 km
Mexico
- Tree cover
- 6%
- Air quality
- 8
- Ciudad Obregón204.5 km
Mexico
- Tree cover
- 7%
- Air quality
- 58
- Nogales246.9 km
Mexico
- Tree cover
- 7%
- Air quality
- 12
- Navojoa269.6 km
Mexico
- Tree cover
- 12%
- Air quality
- 18
- Tucson348.4 km
United States
- Tree cover
- 13%
- Air quality
- 29
- Cuauhtémoc406.8 km
Mexico
- Tree cover
- 4%
- Air quality
- 29
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Frequently asked
Questions about Hermosillo
What is the air quality (AQI) in Hermosillo right now?
The latest reading for Hermosillo shows an AQI of 12 (Good), observed Nov 11, 04:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Hermosillo today?
At AQI 12 (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 Hermosillo been like this week?
Over the last 7 days, the CAMS air-quality model put Hermosillo's daily AQI at 20 on average, from 12 on Nov 11 to an hourly peak of 53 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Hermosillo lost since 2001?
There was very little forest around Hermosillo in 2000, about 31 hectares, and about 30 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.
What is the tree count in Hermosillo?
Hermosillo has an estimated 12,252 trees across the 12.57 km² measured — 3.9% tree cover, 26 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hermosillo need?
Hermosillo needs roughly 81,996 more trees to close a 26-point shortfall against its 30% tree-cover target — about 1,804 t of extra CO₂ absorbed per year once grown.
How are Hermosillo'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 2 km radius around San Benito; the tree count is an estimate derived from that cover.
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