City report · Mexico
Mérida Air quality today
Air quality in Mérida currently reads AQI 49 (Good): Air quality is satisfactory for everyone.
AQI 49
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.3
- tree cover
- 24.7%
- trees in this area
- 77.6K
- more trees needed
- 16.6K
Measured across a 2 km radius around Centro, Mérida, Yuc., Mexico (12.57 km²), from a satellite image of Sep 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Mérida · AQI 49 (Good)
Mérida's tree count comes to 77,597 trees across 12.57 km², 5 points below the 30% tree-cover level considered healthy for this area, so roughly 16,650 more trees would close the gap.
Air quality detail
Air quality in Mérida today: AQI 49, Good
Main pollutant: PM2.5 · Observed Nov 10, 21:00 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
8.3
PM10
10.8
NO₂
11.2
O₃
47.0
SO₂
3.0
CO
286.0
- 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 Mérida's daily AQI at 36 on average, from 29 on Nov 7 to an hourly peak of 55 on Nov 4.
Where Mérida stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Mérida: Below target
24.7% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
77,597
Target trees
94,247
More trees needed
16,650
CO₂ if planted / yr
366.3 t
Deforestation · 2001–2025
How much forest has Mérida lost?
Since 2001, the area within 10 km of Mérida has lost about 3,740 hectares of forest (about 5,200 football pitches): 57% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from February 2017 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 3,740 haabout 5,200 football pitches
- Share of its forest
- 57%of what there was in 2000
- Cleared for good
- 3,740 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 63 hectares a year in 2021–2025, against 61 hectares a year in 2016–2020. The worst year was 2009, when about 714 hectares of forest were lost.
Mérida's full deforestation reportHectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 75 ha | under 1 ha | 75 ha |
| 2002 | 49 ha | under 1 ha | 49 ha |
| 2003 | 118 ha | under 1 ha | 118 ha |
| 2004 | 251 ha | under 1 ha | 251 ha |
| 2005 | 270 ha | under 1 ha | 270 ha |
| 2006 | 356 ha | under 1 ha | 356 ha |
| 2007 | 540 ha | 1 ha | 541 ha |
| 2008 | 146 ha | under 1 ha | 146 ha |
| 2009 | 713 ha | 1 ha | 714 ha |
| 2010 | 110 ha | under 1 ha | 110 ha |
| 2011 | 95 ha | under 1 ha | 95 ha |
| 2012 | 132 ha | under 1 ha | 132 ha |
| 2013 | 51 ha | under 1 ha | 51 ha |
| 2014 | 105 ha | under 1 ha | 105 ha |
| 2015 | 105 ha | under 1 ha | 105 ha |
| 2016 | 85 ha | under 1 ha | 85 ha |
| 2017 | 58 ha | under 1 ha | 58 ha |
| 2018 | 81 ha | under 1 ha | 81 ha |
| 2019 | 31 ha | under 1 ha | 31 ha |
| 2020 | 50 ha | under 1 ha | 50 ha |
| 2021 | 63 ha | under 1 ha | 63 ha |
| 2022 | 76 ha | under 1 ha | 76 ha |
| 2023 | 64 ha | under 1 ha | 64 ha |
| 2024 | 54 ha | under 1 ha | 54 ha |
| 2025 | 60 ha | under 1 ha | 60 ha |
What is causing deforestation around Mérida?
- Towns and roadscleared for good84% · 3,150 ha
- Farms, pasture and plantationscleared for good11% · 429 ha
- Mining and energycleared for good4.3% · 161 ha
Also: 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
- 3,600 ha
- Forest in 2020
- 1,660 ha
- Overall change
- −1,940 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Mérida shrank from about 3,600 hectares to 1,660 hectares, a net loss of about 1,940 hectares (−54%). New forest grew on about 237 hectares, but 2,180 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 Mérida
Same 2 km radius, same index — so they compare directly.
- Campeche156.1 km
Mexico
- Tree cover
- 14%
- Air quality
- 34
- Playa del Carmen267.1 km
Mexico
- Tree cover
- 25%
- Air quality
- 28
- Cancún289.0 km
Mexico
- Tree cover
- 12%
- Air quality
- 46
- Chetumal305.2 km
Mexico
- Tree cover
- 19%
- Air quality
- 17
- Orange Walk339.6 km
Belize
- Tree cover
- 44%
- Air quality
- 16
- Ciudad del Carmen346.3 km
Mexico
- Tree cover
- 19%
- Air quality
- 36
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Frequently asked
Questions about Mérida
What is the air quality (AQI) in Mérida right now?
The latest reading for Mérida shows an AQI of 49 (Good), observed Nov 10, 21:00 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 Mérida today?
At AQI 49 (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 Mérida been like this week?
Over the last 7 days, the CAMS air-quality model put Mérida's daily AQI at 36 on average, from 29 on Nov 7 to an hourly peak of 55 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 Mérida lost since 2001?
Since 2001, the area within 10 km of Mérida has lost about 3,740 hectares of forest (about 5,200 football pitches): 57% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss has stayed about the same: about 63 hectares a year in 2021–2025, against 61 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Mérida shrank from about 3,600 hectares to 1,660 hectares, a net loss of about 1,940 hectares (−54%). New forest grew on about 237 hectares, but 2,180 hectares were lost.
What is the tree count in Mérida?
Mérida has an estimated 77,597 trees across the 12.57 km² measured — 24.7% tree cover, 5 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Mérida need?
Mérida needs roughly 16,650 more trees to close a 5-point shortfall against its 30% tree-cover target — about 366.3 t of extra CO₂ absorbed per year once grown.
How are Mérida'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 Centro; the tree count is an estimate derived from that cover.
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