City report · Madagascar
Toamasina Air quality today
Air quality in Toamasina currently reads AQI 54 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 54
Moderate
- PM2.5, fine particles (µg/m³)
- 10.8
- tree cover
- 17.0%
- trees in this area
- 51.4K
- more trees needed
- 39.3K
Measured across a 2 km radius around Toamasina, Madagascar (12.57 km²), from a satellite image of Sep 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Toamasina · AQI 54 (Moderate)
Toamasina's tree count comes to 51,378 trees across 12.09 km² of land, 13 points below the 30% tree-cover level considered healthy for this area, so roughly 39,289 more trees would close the gap.
Air quality detail
Air quality in Toamasina today: AQI 54, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 19:00 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
10.8
PM10
17.8
NO₂
0.7
O₃
53.0
SO₂
0.6
CO
90.0
- 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 Toamasina's daily AQI at 46 on average, from 38 on Nov 8 to an hourly peak of 56 on Nov 5.
Where Toamasina stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Toamasina: Critically low
17.0% tree cover against a 30% healthy-neighborhood target, across 12.09 km² of land.
Trees in this area
51,378
Target trees
90,667
More trees needed
39,289
CO₂ if planted / yr
864.4 t
Deforestation · 2001–2025
How much forest has Toamasina lost?
Since 2001, the area within 10 km of Toamasina has lost about 3,200 hectares of forest (about 4,500 football pitches): 36% of the forest it had in 2000. Most of it was lost to shifting farming, so much of it can grow back. About 938 hectares (29%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 3,200 haabout 4,500 football pitches
- Share of its forest
- 36%of what there was in 2000
- Cleared for good
- 938 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 200 hectares a year in 2021–2025, against 264 hectares a year in 2016–2020. The worst year was 2017, when about 380 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 | 5 ha | 10 ha | 15 ha |
| 2002 | 3 ha | 7 ha | 10 ha |
| 2003 | 4 ha | 9 ha | 12 ha |
| 2004 | 4 ha | 10 ha | 14 ha |
| 2005 | 11 ha | 6 ha | 17 ha |
| 2006 | 3 ha | 3 ha | 6 ha |
| 2007 | 34 ha | 19 ha | 52 ha |
| 2008 | 45 ha | 33 ha | 79 ha |
| 2009 | 20 ha | 44 ha | 64 ha |
| 2010 | 18 ha | 42 ha | 60 ha |
| 2011 | 4 ha | 9 ha | 14 ha |
| 2012 | 17 ha | 15 ha | 32 ha |
| 2013 | 81 ha | 123 ha | 204 ha |
| 2014 | 93 ha | 105 ha | 198 ha |
| 2015 | 21 ha | 79 ha | 100 ha |
| 2016 | 45 ha | 198 ha | 243 ha |
| 2017 | 101 ha | 279 ha | 380 ha |
| 2018 | 61 ha | 274 ha | 335 ha |
| 2019 | 37 ha | 110 ha | 147 ha |
| 2020 | 61 ha | 155 ha | 216 ha |
| 2021 | 75 ha | 178 ha | 252 ha |
| 2022 | 61 ha | 134 ha | 195 ha |
| 2023 | 52 ha | 180 ha | 232 ha |
| 2024 | 41 ha | 89 ha | 130 ha |
| 2025 | 40 ha | 152 ha | 192 ha |
What is causing deforestation around Toamasina?
- Shifting farmingcan grow back68% · 2,180 ha
- Farms, pasture and plantationscleared for good13% · 408 ha
- Towns and roadscleared for good12% · 398 ha
Also: mining and energy, 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
- 4,930 ha
- Forest in 2020
- 4,620 ha
- Overall change
- −318 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Toamasina shrank from about 4,930 hectares to 4,620 hectares, a net loss of about 318 hectares (−6.4%). New forest grew on about 232 hectares, but 550 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 Toamasina
Same 2 km radius, same index — so they compare directly.
- Fianarantsoa440.1 km
Madagascar
- Tree cover
- 33%
- Air quality
- 18
- Antsiranana648.6 km
Madagascar
- Tree cover
- 12%
- Air quality
- 34
- Saint-Paul692.2 km
Reunion
- Tree cover
- 44%
- Air quality
- 27
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Frequently asked
Questions about Toamasina
What is the air quality (AQI) in Toamasina right now?
The latest reading for Toamasina shows an AQI of 54 (Moderate), observed Nov 10, 19:00 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 Toamasina today?
At AQI 54 (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 Toamasina been like this week?
Over the last 7 days, the CAMS air-quality model put Toamasina's daily AQI at 46 on average, from 38 on Nov 8 to an hourly peak of 56 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 Toamasina lost since 2001?
Since 2001, the area within 10 km of Toamasina has lost about 3,200 hectares of forest (about 4,500 football pitches): 36% of the forest it had in 2000. Most of it was lost to shifting farming, so much of it can grow back. About 938 hectares (29%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss has stayed about the same: about 200 hectares a year in 2021–2025, against 264 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Toamasina shrank from about 4,930 hectares to 4,620 hectares, a net loss of about 318 hectares (−6.4%). New forest grew on about 232 hectares, but 550 hectares were lost.
What is the tree count in Toamasina?
Toamasina has an estimated 51,378 trees across the 12.09 km² of land measured — 17.0% tree cover, 13 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Toamasina need?
Toamasina needs roughly 39,289 more trees to close a 13-point shortfall against its 30% tree-cover target — about 864.4 t of extra CO₂ absorbed per year once grown.
How are Toamasina'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 Toamasina; the tree count is an estimate derived from that cover.
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