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Air quality now: AQI4Good, São Mateus

City report · Espírito Santo, Brazil

São Mateus Air quality today

Air quality in São Mateus currently reads AQI 4 (Good): Air quality is satisfactory for everyone.

AQI 4

Air quality right now

Good

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
1.0
tree cover
31.7%
trees in this area
98.2K
more trees needed
0

Measured across a 2 km radius around Sernamby, São Mateus - ES, Brazil (12.57 km²), from a satellite image of Oct 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

São Mateus · AQI 4 (Good)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Oct 1, 2026

São Mateus's tree count comes to 98,194 trees across 12.39 km² of land, already at or above the 30% tree-cover level considered healthy for this area.

Air quality detail

Air quality in São Mateus today: AQI 4, Good

Main pollutant: PM2.5 · Observed Nov 11, 13:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 185 km, US EPA index. Values in µg/m³.

Estimate · model corrected with 3 station cities within 185 km, e.g. Serra and Cariacica

Health signal

Air quality is satisfactory for everyone.

PM2.5

1.0

PM10

6.4

NO₂

0.5

O₃

61.0

SO₂

0.3

CO

91.0

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 São Mateus's daily AQI at 36 on average, from 11 on Nov 11 to an hourly peak of 54 on Nov 8.

Last 7 daysavg 36 · peak 54
Nov 5: AQI 42 (peak 53)Nov 6: AQI 49 (peak 53)Nov 7: AQI 49 (peak 53)Nov 8: AQI 39 (peak 54)Nov 9: AQI 38 (peak 52)Nov 10: AQI 22 (peak 29)Nov 11: AQI 11 (peak 18)
Nov 5Nov 11

Where São Mateus stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in São Mateus: Healthy tree cover

31.7% tree cover against a 30% healthy-neighborhood target, across 12.39 km² of land.

Target reached

Trees in this area

98,194

Target trees

98,194

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has São Mateus lost?

Since 2001, the area within 10 km of São Mateus has lost about 8,700 hectares of forest (about 12,000 football pitches): 60% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 607 hectares (7%) was deforestation: forest cleared for good for farms, mines or towns.

Satellite image of the area around São Mateus, July 2017

2017: satellite photo from July 2017 of a 5 × 5 km area about 5 km southeast of the city center.

Forest lost since 2001
8,700 haabout 12,000 football pitches
Share of its forest
60%of what there was in 2000
Cleared for good
607 hadeforestation: turned into farms, mines or towns

Forest loss is slowing down: about 63 hectares a year in 2021–2025, down from 289 hectares a year in 2016–2020. The worst year was 2010, when about 1,430 hectares of forest were lost.

Forest lost each year around São Mateus, 2001–2025

Hectares of forest lost each year

Forest lost each year around São Mateus, 2001–2025. Use the left and right arrow keys to read each year.1.43K

Show the figures as a table
Forest lost each year around São Mateus, 2001–2025
YearCleared for goodCan grow backTotal
200111 ha83 ha94 ha
20029 ha694 ha703 ha
20039 ha74 ha82 ha
200413 ha594 ha607 ha
20059 ha193 ha202 ha
200676 ha331 ha407 ha
200785 ha767 ha851 ha
20086 ha189 ha195 ha
20095 ha179 ha183 ha
20108 ha1,420 ha1,430 ha
201124 ha542 ha566 ha
201282 ha945 ha1,030 ha
201334 ha304 ha338 ha
201414 ha151 ha164 ha
20159 ha89 ha98 ha
201676 ha676 ha752 ha
201766 ha384 ha450 ha
20182 ha88 ha89 ha
201911 ha129 ha140 ha
20204 ha8 ha12 ha
20219 ha71 ha80 ha
20226 ha77 ha82 ha
20238 ha50 ha58 ha
202417 ha34 ha51 ha
202518 ha27 ha44 ha

What is causing deforestation around São Mateus?

  • Loggingcan grow back92% · 7,970 ha
  • Farms, pasture and plantationscleared for good6.3% · 547 ha

Also: wildfires, towns and roads, storms, floods and other natural causes, 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
12,500 ha
Forest in 2020
13,000 ha
Overall change
+483 hamore forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around São Mateus grew from about 12,500 hectares to 13,000 hectares, a net gain of about 483 hectares (+3.9%). New forest grew on about 2,240 hectares, while 1,750 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 São Mateus

Same 2 km radius, same index — so they compare directly.

  • Linhares

    Brazil

    77.9 km
    Tree cover
    27%
    Air quality
    6
  • Colatina

    Brazil

    122.0 km
    Tree cover
    30%
    Air quality
    14
  • Teixeira de Freitas

    Brazil

    132.4 km
    Tree cover
    15%
    Air quality
    11
  • Serra

    Brazil

    163.5 km
    Tree cover
    36%
    Air quality
    13
  • Cariacica

    Brazil

    181.5 km
    Tree cover
    51%
    Air quality
    13
  • Vila Velha

    Brazil

    184.7 km
    Tree cover
    27%
    Air quality
    13

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São Mateus air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about São Mateus

What is the air quality (AQI) in São Mateus right now?

The latest reading for São Mateus shows an AQI of 4 (Good), observed Nov 11, 13:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 185 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.

Is it safe to exercise outside in São Mateus today?

At AQI 4 (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 São Mateus been like this week?

Over the last 7 days, the CAMS air-quality model put São Mateus's daily AQI at 36 on average, from 11 on Nov 11 to an hourly peak of 54 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.

How much forest has the area around São Mateus lost since 2001?

Since 2001, the area within 10 km of São Mateus has lost about 8,700 hectares of forest (about 12,000 football pitches): 60% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 607 hectares (7%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 63 hectares a year in 2021–2025, down from 289 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around São Mateus grew from about 12,500 hectares to 13,000 hectares, a net gain of about 483 hectares (+3.9%). New forest grew on about 2,240 hectares, while 1,750 hectares were lost.

What is the tree count in São Mateus?

São Mateus has an estimated 98,194 trees across the 12.39 km² of land measured — 31.7% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does São Mateus need?

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

How are São Mateus'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 Sernamby; the tree count is an estimate derived from that cover.

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