City report · Senegal
Thiès Air quality today
Air quality in Thiès currently reads AQI 59 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 59
Moderate
- PM2.5, fine particles (µg/m³)
- 13.6
- tree cover
- 17.1%
- trees in this area
- 53.7K
- more trees needed
- 40.5K
Measured across a 2 km radius around Randouléne Nord, Thiès, Senegal (12.57 km²), from a satellite image of Sep 18, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Thiès · AQI 59 (Moderate)
Thiès's tree count comes to 53,721 trees across 12.57 km², 13 points below the 30% tree-cover level considered healthy for this area, so roughly 40,527 more trees would close the gap.
Air quality detail
Air quality in Thiès today: AQI 59, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 14:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Lycée Jules Sagna de Thiès, 800 m away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
13.6
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, kaikai.dev
- 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 Thiès's daily AQI at 61 on average, from 56 on Nov 10 to an hourly peak of 84 on Nov 8.
Where Thiès stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Thiès: Critically low
17.1% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
53,721
Target trees
94,248
More trees needed
40,527
CO₂ if planted / yr
891.6 t
Deforestation · 2001–2025
How much forest has Thiès lost?
There was almost no forest around Thiès in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.
Forest gained and lost, 2000–2020
- Forest in 2000
- 256 ha
- Forest in 2020
- 310 ha
- Overall change
- +54 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Thiès grew from about 256 hectares to 310 hectares, a net gain of about 54 hectares (+21%). New forest grew on about 63 hectares, while 8 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 Thiès
Same 2 km radius, same index — so they compare directly.
- Tivaouane21.6 km
Senegal
- Tree cover
- 4%
- Air quality
- 59
- Rufisque38.2 km
Senegal
- Tree cover
- 2%
- Air quality
- 16
- Pikine50.0 km
Senegal
- Tree cover
- 8%
- Air quality
- 58
- Diourbel75.1 km
Senegal
- Tree cover
- 9%
- Air quality
- 42
Also compared:Thiès vs ToubaThiès vs Kaolack
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Frequently asked
Questions about Thiès
What is the air quality (AQI) in Thiès right now?
The latest reading for Thiès shows an AQI of 59 (Moderate), measured Nov 11, 14:00 local time by the Lycée Jules Sagna de Thiès ground monitoring station, 800 m away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Thiès today?
At AQI 59 (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 Thiès been like this week?
Over the last 7 days, the CAMS air-quality model put Thiès's daily AQI at 61 on average, from 56 on Nov 10 to an hourly peak of 84 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 Thiès lost since 2001?
There was almost no forest around Thiès in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Thiès grew from about 256 hectares to 310 hectares, a net gain of about 54 hectares (+21%). New forest grew on about 63 hectares, while 8 hectares were lost.
What is the tree count in Thiès?
Thiès has an estimated 53,721 trees across the 12.57 km² measured — 17.1% tree cover, 13 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Thiès need?
Thiès needs roughly 40,527 more trees to close a 13-point shortfall against its 30% tree-cover target — about 891.6 t of extra CO₂ absorbed per year once grown.
How are Thiès's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Randouléne Nord, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Randouléne Nord; the tree count is an estimate derived from that cover.
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