City report · Sri Lanka
Trincomalee Air quality today
Air quality in Trincomalee currently reads AQI 25 (Good): Air quality is satisfactory for everyone.
AQI 25
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 3.9
- tree cover
- 39.9%
- trees in this area
- 56.9K
- more trees needed
- 0
Measured across a 2 km radius around Arunagiri Nagar, Trincomalee, Sri Lanka (12.57 km²), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Trincomalee · AQI 25 (Good)
Trincomalee's tree count comes to 56,909 trees across 5.71 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Trincomalee today: AQI 25, Good
Main pollutant: PM2.5 · Observed Nov 11, 04:30 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
3.9
PM10
4.7
NO₂
9.3
O₃
17.0
SO₂
0.8
CO
249.0
- 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 Trincomalee's daily AQI at 22 on average, from 17 on Nov 6 to an hourly peak of 44 on Nov 5.
Where Trincomalee stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Trincomalee: Healthy tree cover
39.9% tree cover against a 30% healthy-neighborhood target, across 5.71 km² of land.
Trees in this area
56,909
Target trees
56,909
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Trincomalee lost?
Since 2001, the area within 10 km of Trincomalee has lost about 473 hectares of forest (about 660 football pitches): 9.7% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from April 2017 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 473 haabout 660 football pitches
- Share of its forest
- 9.7%of what there was in 2000
- Cleared for good
- 470 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 84 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 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | 13 ha | under 1 ha | 13 ha |
| 2003 | 15 ha | under 1 ha | 15 ha |
| 2004 | 28 ha | under 1 ha | 28 ha |
| 2005 | 13 ha | under 1 ha | 13 ha |
| 2006 | 84 ha | under 1 ha | 84 ha |
| 2007 | 45 ha | under 1 ha | 45 ha |
| 2008 | 14 ha | under 1 ha | 14 ha |
| 2009 | 26 ha | under 1 ha | 26 ha |
| 2010 | 20 ha | under 1 ha | 20 ha |
| 2011 | 23 ha | under 1 ha | 23 ha |
| 2012 | 27 ha | under 1 ha | 27 ha |
| 2013 | 13 ha | under 1 ha | 13 ha |
| 2014 | 10 ha | under 1 ha | 10 ha |
| 2015 | 7 ha | under 1 ha | 7 ha |
| 2016 | 12 ha | under 1 ha | 12 ha |
| 2017 | 13 ha | under 1 ha | 13 ha |
| 2018 | 10 ha | under 1 ha | 10 ha |
| 2019 | 16 ha | under 1 ha | 16 ha |
| 2020 | 6 ha | under 1 ha | 6 ha |
| 2021 | 12 ha | under 1 ha | 12 ha |
| 2022 | 18 ha | under 1 ha | 18 ha |
| 2023 | 22 ha | under 1 ha | 22 ha |
| 2024 | 17 ha | under 1 ha | 17 ha |
| 2025 | 7 ha | under 1 ha | 7 ha |
What is causing deforestation around Trincomalee?
- Farms, pasture and plantationscleared for good50% · 237 ha
- Towns and roadscleared for good49% · 233 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
- 7,060 ha
- Forest in 2020
- 6,480 ha
- Overall change
- −573 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Trincomalee shrank from about 7,060 hectares to 6,480 hectares, a net loss of about 573 hectares (−8.1%). New forest grew on about 38 hectares, but 611 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 Trincomalee
Same 2 km radius, same index — so they compare directly.
- Kandy157.4 km
Sri Lanka
- Tree cover
- 74%
- Air quality
- 30
- Negombo216.2 km
Sri Lanka
- Tree cover
- 41%
- Air quality
- 51
- Colombo237.6 km
Sri Lanka
- Tree cover
- 12%
- Air quality
- 77
- Dehiwala-Mount Lavinia244.4 km
Sri Lanka
- Tree cover
- 29%
- Air quality
- 91
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Frequently asked
Questions about Trincomalee
What is the air quality (AQI) in Trincomalee right now?
The latest reading for Trincomalee shows an AQI of 25 (Good), observed Nov 11, 04:30 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 Trincomalee today?
At AQI 25 (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 Trincomalee been like this week?
Over the last 7 days, the CAMS air-quality model put Trincomalee's daily AQI at 22 on average, from 17 on Nov 6 to an hourly peak of 44 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Trincomalee lost since 2001?
Since 2001, the area within 10 km of Trincomalee has lost about 473 hectares of forest (about 660 football pitches): 9.7% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Trincomalee shrank from about 7,060 hectares to 6,480 hectares, a net loss of about 573 hectares (−8.1%). New forest grew on about 38 hectares, but 611 hectares were lost.
What is the tree count in Trincomalee?
Trincomalee has an estimated 56,909 trees across the 5.71 km² of land measured — 39.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Trincomalee need?
Trincomalee has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Trincomalee'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 Arunagiri Nagar; the tree count is an estimate derived from that cover.
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