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Airleaf

City report · Timor Leste

Suai Air quality today

Air quality in Suai currently reads AQI 58 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

AQI 58

Air quality right now

Moderate

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
13.8
tree cover
55.2%
trees in this area
173K
more trees needed
0

Measured across a 2 km radius around Suai, Timor-Leste (12.57 km²), from a satellite image of Sep 16, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 16, 2026

Suai's tree count comes to 173,416 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 Suai today: AQI 58, Moderate

Main pollutant: PM2.5 · Observed Nov 11, 04:00 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

13.8

PM10

15.9

NO₂

10.7

O₃

10.0

SO₂

0.6

CO

167.0

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 Suai's daily AQI at 62 on average, from 46 on Nov 10 to an hourly peak of 105 on Nov 7.

Last 7 daysavg 62 · peak 105
Nov 5: AQI 49 (peak 64)Nov 6: AQI 70 (peak 102)Nov 7: AQI 82 (peak 105)Nov 8: AQI 71 (peak 75)Nov 9: AQI 60 (peak 79)Nov 10: AQI 46 (peak 61)Nov 11: AQI 56 (peak 58)
Nov 5Nov 11

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

Tree cover detail

Tree cover in Suai: Healthy tree cover

55.2% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

173,416

Target trees

173,416

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Suai lost?

Since 2001, the area within 10 km of Suai has lost about 2,190 hectares of forest (about 3,100 football pitches): 14% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.

Satellite image of the area around Suai, October 2017

2017: satellite photo from October 2017 of a 5 × 5 km area about 6 km southwest of the city center.

Forest lost since 2001
2,190 haabout 3,100 football pitches
Share of its forest
14%of what there was in 2000
Cleared for good
2,180 hadeforestation: turned into farms, mines or towns

Forest loss has stayed about the same: about 69 hectares a year in 2021–2025, against 89 hectares a year in 2016–2020. The worst year was 2012, when about 227 hectares of forest were lost.

Forest lost each year around Suai, 2001–2025

Hectares of forest lost each year

Forest lost each year around Suai, 2001–2025. Use the left and right arrow keys to read each year.227

Show the figures as a table
Forest lost each year around Suai, 2001–2025
YearCleared for goodCan grow backTotal
200145 haunder 1 ha45 ha
2002138 ha1 ha139 ha
200350 haunder 1 ha50 ha
2004189 ha1 ha190 ha
200548 haunder 1 ha48 ha
2006157 haunder 1 ha157 ha
200766 haunder 1 ha66 ha
200868 haunder 1 ha68 ha
2009122 haunder 1 ha122 ha
201016 haunder 1 ha17 ha
2011105 haunder 1 ha105 ha
2012227 haunder 1 ha227 ha
201320 haunder 1 ha20 ha
201490 haunder 1 ha90 ha
201560 haunder 1 ha60 ha
2016108 haunder 1 ha108 ha
201786 haunder 1 ha86 ha
201868 haunder 1 ha68 ha
201974 haunder 1 ha74 ha
2020110 haunder 1 ha110 ha
2021113 haunder 1 ha113 ha
202279 haunder 1 ha79 ha
202355 haunder 1 ha55 ha
202445 haunder 1 ha45 ha
202546 ha3 ha50 ha

What is causing deforestation around Suai?

  • Farms, pasture and plantationscleared for good96% · 2,110 ha
  • Towns and roadscleared for good2.5% · 55 ha
  • Mining and energycleared for good1.1% · 24 ha

Also: wildfires, 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
19,200 ha
Forest in 2020
18,500 ha
Overall change
−684 haless forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Suai shrank from about 19,200 hectares to 18,500 hectares, a net loss of about 684 hectares (−3.6%). New forest grew on about 276 hectares, but 960 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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Suai air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Suai

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

The latest reading for Suai shows an AQI of 58 (Moderate), observed Nov 11, 04:00 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 Suai today?

At AQI 58 (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 Suai been like this week?

Over the last 7 days, the CAMS air-quality model put Suai's daily AQI at 62 on average, from 46 on Nov 10 to an hourly peak of 105 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 Suai lost since 2001?

Since 2001, the area within 10 km of Suai has lost about 2,190 hectares of forest (about 3,100 football pitches): 14% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss has stayed about the same: about 69 hectares a year in 2021–2025, against 89 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Suai shrank from about 19,200 hectares to 18,500 hectares, a net loss of about 684 hectares (−3.6%). New forest grew on about 276 hectares, but 960 hectares were lost.

What is the tree count in Suai?

Suai has an estimated 173,416 trees across the 12.57 km² measured — 55.2% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Suai need?

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

How are Suai'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 Suai; the tree count is an estimate derived from that cover.

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