City report · Piauí, Brazil
Teresina Air quality today
Air quality in Teresina currently reads AQI 63 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 63
Moderate
- PM2.5, fine particles (µg/m³)
- 13.9
- tree cover
- 14.5%
- trees in this area
- 45.3K
- more trees needed
- 48.5K
Measured across a 2 km radius around Centro (Sul), Teresina - PI, Brazil (12.57 km²), from a satellite image of Nov 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Teresina · AQI 63 (Moderate)
Teresina's tree count comes to 45,325 trees across 12.51 km² of land, 16 points below the 30% tree-cover level considered healthy for this area, so roughly 48,451 more trees would close the gap.
Air quality detail
Air quality in Teresina today: AQI 63, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 08:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
13.9
PM10
16.8
NO₂
4.2
O₃
55.0
SO₂
1.4
CO
164.0
- 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 Teresina's daily AQI at 52 on average, from 44 on Nov 7 to an hourly peak of 78 on Nov 4.
Where Teresina stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Teresina: Critically low
14.5% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
45,325
Target trees
93,776
More trees needed
48,451
CO₂ if planted / yr
1,066 t
Deforestation · 2001–2025
How much forest has Teresina lost?
Since 2001, the area within 10 km of Teresina has lost about 2,810 hectares of forest (about 3,900 football pitches): 34% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from September 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 2,810 haabout 3,900 football pitches
- Share of its forest
- 34%of what there was in 2000
- Cleared for good
- 2,780 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 78 hectares a year in 2021–2025, down from 140 hectares a year in 2016–2020. The worst year was 2012, when about 304 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 | 148 ha | under 1 ha | 148 ha |
| 2002 | 94 ha | 1 ha | 96 ha |
| 2003 | 37 ha | under 1 ha | 37 ha |
| 2004 | 103 ha | under 1 ha | 103 ha |
| 2005 | 20 ha | under 1 ha | 20 ha |
| 2006 | 16 ha | under 1 ha | 17 ha |
| 2007 | 129 ha | 1 ha | 130 ha |
| 2008 | 125 ha | 1 ha | 126 ha |
| 2009 | 50 ha | under 1 ha | 50 ha |
| 2010 | 220 ha | 1 ha | 221 ha |
| 2011 | 12 ha | under 1 ha | 12 ha |
| 2012 | 304 ha | under 1 ha | 304 ha |
| 2013 | 122 ha | under 1 ha | 122 ha |
| 2014 | 238 ha | 3 ha | 241 ha |
| 2015 | 91 ha | under 1 ha | 91 ha |
| 2016 | 208 ha | 12 ha | 220 ha |
| 2017 | 143 ha | 6 ha | 149 ha |
| 2018 | 113 ha | 1 ha | 114 ha |
| 2019 | 97 ha | under 1 ha | 97 ha |
| 2020 | 119 ha | under 1 ha | 119 ha |
| 2021 | 74 ha | under 1 ha | 74 ha |
| 2022 | 85 ha | under 1 ha | 85 ha |
| 2023 | 72 ha | under 1 ha | 72 ha |
| 2024 | 88 ha | under 1 ha | 88 ha |
| 2025 | 70 ha | 2 ha | 73 ha |
What is causing deforestation around Teresina?
- Towns and roadscleared for good71% · 2,000 ha
- Farms, pasture and plantationscleared for good20% · 558 ha
- Mining and energycleared for good7.9% · 221 ha
Also: storms, floods and other natural causes, wildfires, 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
- 6,580 ha
- Forest in 2020
- 4,760 ha
- Overall change
- −1,820 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Teresina shrank from about 6,580 hectares to 4,760 hectares, a net loss of about 1,820 hectares (−28%). New forest grew on about 183 hectares, but 2,010 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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Frequently asked
Questions about Teresina
What is the air quality (AQI) in Teresina right now?
The latest reading for Teresina shows an AQI of 63 (Moderate), observed Nov 10, 08:00 local time via Open-Meteo / CAMS, 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 Teresina today?
At AQI 63 (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 Teresina been like this week?
Over the last 7 days, the CAMS air-quality model put Teresina's daily AQI at 52 on average, from 44 on Nov 7 to an hourly peak of 78 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 Teresina lost since 2001?
Since 2001, the area within 10 km of Teresina has lost about 2,810 hectares of forest (about 3,900 football pitches): 34% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is slowing down: about 78 hectares a year in 2021–2025, down from 140 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Teresina shrank from about 6,580 hectares to 4,760 hectares, a net loss of about 1,820 hectares (−28%). New forest grew on about 183 hectares, but 2,010 hectares were lost.
What is the tree count in Teresina?
Teresina has an estimated 45,325 trees across the 12.51 km² of land measured — 14.5% tree cover, 16 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Teresina need?
Teresina needs roughly 48,451 more trees to close a 16-point shortfall against its 30% tree-cover target — about 1,066 t of extra CO₂ absorbed per year once grown.
How are Teresina'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 (Sul); the tree count is an estimate derived from that cover.
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