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City report · San Luis Potosí, Mexico

Ciudad Valles Air quality today

Air quality in Ciudad Valles currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

Air quality right now

AQI 51

Moderate

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
8.5
tree cover
40.8%
trees in this area
128K
more trees needed
0

Measured across a 2 km radius around Nte. Residencial, Cdad. Valles, S.L.P., Mexico (12.57 km²), from a satellite image of Sep 2, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Ciudad Valles · AQI 51 (Moderate)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 2, 2026

Ciudad Valles's tree count comes to 128,177 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.

Air quality detail

Air quality in Ciudad Valles today: AQI 51, Moderate

Main pollutant: PM2.5 · Observed Nov 10, 03:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 250 km, US EPA index. Values in µg/m³.

Estimate · model corrected with 4 station cities within 250 km, e.g. Pachuca de Soto and Santiago de Querétaro

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

8.5

PM10

6.3

NO₂

5.7

O₃

36.0

SO₂

3.7

CO

139.0

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 Ciudad Valles's daily AQI at 49 on average, from 30 on Nov 9 to an hourly peak of 91 on Nov 4.

Last 7 daysavg 49 · peak 91
Nov 4: AQI 66 (peak 91)Nov 5: AQI 74 (peak 90)Nov 6: AQI 59 (peak 74)Nov 7: AQI 33 (peak 62)Nov 8: AQI 41 (peak 58)Nov 9: AQI 30 (peak 49)Nov 10: AQI 39 (peak 43)
Nov 4Nov 10

Where Ciudad Valles stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in Ciudad Valles: Healthy tree cover

40.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

128,177

Target trees

128,177

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Ciudad Valles lost?

Since 2001, the area within 10 km of Ciudad Valles has lost about 2,080 hectares of forest (about 2,900 football pitches): 15% of the forest it had in 2000. Most of it (90%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.

Satellite image of the area around Ciudad Valles, May 2017

2017: satellite photo from May 2017 of a 5 × 5 km area about 4 km northeast of the city center.

Forest lost since 2001
2,080 haabout 2,900 football pitches
Share of its forest
15%of what there was in 2000
Cleared for good
1,870 hadeforestation: turned into farms, mines or towns

Forest loss is speeding up: about 87 hectares a year in 2021–2025, up from 70 hectares a year in 2016–2020. The worst year was 2013, when about 464 hectares of forest were lost.

Forest lost each year around Ciudad Valles, 2001–2025

Hectares of forest lost each year

Forest lost each year around Ciudad Valles, 2001–2025. Use the left and right arrow keys to read each year.464

Show the figures as a table
Forest lost each year around Ciudad Valles, 2001–2025
YearCleared for goodCan grow backTotal
200122 haunder 1 ha22 ha
200213 haunder 1 ha13 ha
200356 haunder 1 ha57 ha
200416 haunder 1 ha16 ha
2005102 ha2 ha104 ha
200699 haunder 1 ha100 ha
200711 haunder 1 ha12 ha
2008249 ha1 ha250 ha
200938 haunder 1 ha38 ha
201056 haunder 1 ha57 ha
201191 haunder 1 ha91 ha
201230 haunder 1 ha30 ha
2013303 ha161 ha464 ha
201412 haunder 1 ha12 ha
201527 haunder 1 ha27 ha
201618 haunder 1 ha18 ha
201778 haunder 1 ha78 ha
201889 haunder 1 ha89 ha
2019128 haunder 1 ha128 ha
202034 haunder 1 ha34 ha
202156 haunder 1 ha56 ha
2022131 haunder 1 ha131 ha
202346 haunder 1 ha46 ha
202432 haunder 1 ha32 ha
2025133 ha37 ha170 ha

What is causing deforestation around Ciudad Valles?

  • Farms, pasture and plantationscleared for good80% · 1,660 ha
  • Towns and roadscleared for good10% · 208 ha
  • Wildfirescan grow back7.8% · 162 ha

Also: mining and energy, 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
13,000 ha
Forest in 2020
13,000 ha
Overall change
+27 hamore forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Ciudad Valles stayed about the same size, at about 13,000 hectares: new forest grew on about 842 hectares, and about 814 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

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Ciudad Valles air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Ciudad Valles

What is the air quality (AQI) in Ciudad Valles right now?

The latest reading for Ciudad Valles shows an AQI of 51 (Moderate), observed Nov 10, 03:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 250 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.

Is it safe to exercise outside in Ciudad Valles today?

At AQI 51 (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 Ciudad Valles been like this week?

Over the last 7 days, the CAMS air-quality model put Ciudad Valles's daily AQI at 49 on average, from 30 on Nov 9 to an hourly peak of 91 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 Ciudad Valles lost since 2001?

Since 2001, the area within 10 km of Ciudad Valles has lost about 2,080 hectares of forest (about 2,900 football pitches): 15% of the forest it had in 2000. Most of it (90%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is speeding up: about 87 hectares a year in 2021–2025, up from 70 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Ciudad Valles stayed about the same size, at about 13,000 hectares: new forest grew on about 842 hectares, and about 814 hectares were lost.

What is the tree count in Ciudad Valles?

Ciudad Valles has an estimated 128,177 trees across the 12.57 km² measured — 40.8% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Ciudad Valles need?

Ciudad Valles has already reached its tree-cover target, so no additional trees are needed to close the gap.

How are Ciudad Valles'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 Nte. Residencial; the tree count is an estimate derived from that cover.

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