City report · Coahuila, Mexico
Piedras Negras Air quality today
Air quality in Piedras Negras currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 52
Moderate
- PM2.5, fine particles (µg/m³)
- 9.6
- tree cover
- 12.9%
- trees in this area
- 40.5K
- more trees needed
- 53.7K
Measured across a 2 km radius around González, 26020 Piedras Negras, Coah., Mexico (12.57 km²), from a satellite image of Sep 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Piedras Negras · AQI 52 (Moderate)
Piedras Negras's tree count comes to 40,527 trees across 12.57 km², 17 points below the 30% tree-cover level considered healthy for this area, so roughly 53,721 more trees would close the gap.
Air quality detail
Air quality in Piedras Negras today: AQI 52, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 08:00 local time via OpenAQ and World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Eagle Pass, Laredo, Texas, 7.1 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.6
PM10
42.6
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · Sinaica Mexico, World Air Quality Index Project, Texas Commission on Environmental Quality (TCEQ), Air Now - US EPA
- 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 Piedras Negras's daily AQI at 27 on average, from 8 on Nov 4 to an hourly peak of 55 on Nov 7.
Where Piedras Negras stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Piedras Negras: Critically low
12.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
40,527
Target trees
94,248
More trees needed
53,721
CO₂ if planted / yr
1,182 t
Deforestation · 2001–2025
How much forest has Piedras Negras lost?
Since 2001, the area within 10 km of Piedras Negras has lost about 67 hectares of forest (about 94 football pitches): 7% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from October 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 67 haabout 94 football pitches
- Share of its forest
- 7%of what there was in 2000
- Cleared for good
- 65 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 10 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 | 6 ha | under 1 ha | 6 ha |
| 2003 | 3 ha | under 1 ha | 3 ha |
| 2004 | 1 ha | under 1 ha | 1 ha |
| 2005 | 4 ha | under 1 ha | 4 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | 5 ha | under 1 ha | 6 ha |
| 2008 | 4 ha | under 1 ha | 4 ha |
| 2009 | 2 ha | under 1 ha | 2 ha |
| 2010 | 9 ha | under 1 ha | 10 ha |
| 2011 | 4 ha | under 1 ha | 5 ha |
| 2012 | 3 ha | under 1 ha | 4 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 3 ha | under 1 ha | 3 ha |
| 2015 | 2 ha | under 1 ha | 2 ha |
| 2016 | 6 ha | under 1 ha | 6 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 | 3 ha | under 1 ha | 3 ha |
| 2023 | 5 ha | under 1 ha | 5 ha |
| 2024 | 1 ha | under 1 ha | 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Piedras Negras?
- Farms, pasture and plantationscleared for good54% · 37 ha
- Towns and roadscleared for good32% · 22 ha
- Mining and energycleared for good11% · 7 ha
Also: logging, 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
- 354 ha
- Forest in 2020
- 127 ha
- Overall change
- −227 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Piedras Negras shrank from about 354 hectares to 127 hectares, a net loss of about 227 hectares (−64%). New forest grew on about 4 hectares, but 231 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 Piedras Negras
Same 2 km radius, same index — so they compare directly.
- Ciudad Acuña80.9 km
Mexico
- Tree cover
- 20%
- Air quality
- 8
- Laredo166.0 km
United States
- Tree cover
- 15%
- Air quality
- 32
- Nuevo Laredo168.2 km
Mexico
- Tree cover
- 10%
- Air quality
- 32
- San Antonio213.1 km
United States
- Tree cover
- 15%
- Air quality
- 33
- Monclova218.0 km
Mexico
- Tree cover
- 10%
- Air quality
- 72
- San Angelo307.4 km
United States
- Tree cover
- 14%
- Air quality
- 11
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Frequently asked
Questions about Piedras Negras
What is the air quality (AQI) in Piedras Negras right now?
The latest reading for Piedras Negras shows an AQI of 52 (Moderate), measured Nov 11, 08:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Eagle Pass, Laredo, Texas, 7.1 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Piedras Negras today?
At AQI 52 (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 Piedras Negras been like this week?
Over the last 7 days, the CAMS air-quality model put Piedras Negras's daily AQI at 27 on average, from 8 on Nov 4 to an hourly peak of 55 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Piedras Negras lost since 2001?
Since 2001, the area within 10 km of Piedras Negras has lost about 67 hectares of forest (about 94 football pitches): 7% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Piedras Negras shrank from about 354 hectares to 127 hectares, a net loss of about 227 hectares (−64%). New forest grew on about 4 hectares, but 231 hectares were lost.
What is the tree count in Piedras Negras?
Piedras Negras has an estimated 40,527 trees across the 12.57 km² measured — 12.9% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Piedras Negras need?
Piedras Negras needs roughly 53,721 more trees to close a 17-point shortfall against its 30% tree-cover target — about 1,182 t of extra CO₂ absorbed per year once grown.
How are Piedras Negras's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near González, 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 González; the tree count is an estimate derived from that cover.
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