City report · Guinea
Manéah Air quality today
Air quality in Manéah currently reads AQI 78 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 78
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 25.2
- tree cover
- 32.3%
- trees in this area
- 101K
- more trees needed
- 0
Measured across a 2 km radius around Coyah, Kindia, Guinea (12.57 km²), from a satellite image of Sep 7, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Manéah · AQI 78 (Moderate)
Manéah's tree count comes to 101,473 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 Manéah today: AQI 78, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 23:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 225 km, e.g. Conakry and Freetown
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
25.2
PM10
32.0
NO₂
4.3
O₃
69.0
SO₂
3.1
CO
437.0
- 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 Manéah's daily AQI at 57 on average, from 29 on Nov 4 to an hourly peak of 91 on Nov 8.
Where Manéah stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Manéah: Healthy tree cover
32.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
101,473
Target trees
101,473
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Manéah lost?
Since 2001, the area within 10 km of Manéah has lost about 3,140 hectares of forest (about 4,400 football pitches): 33% of the forest it had in 2000. Most of it was lost to shifting farming, so much of it can grow back. About 1,220 hectares (39%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from January 2017 of a 5 × 5 km area about 5 km north of the city center.
- Forest lost since 2001
- 3,140 haabout 4,400 football pitches
- Share of its forest
- 33%of what there was in 2000
- Cleared for good
- 1,220 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 152 hectares a year in 2021–2025, down from 251 hectares a year in 2016–2020. The worst year was 2017, when about 298 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 | 17 ha | 14 ha | 31 ha |
| 2002 | 13 ha | 9 ha | 22 ha |
| 2003 | 4 ha | 1 ha | 5 ha |
| 2004 | 22 ha | 4 ha | 26 ha |
| 2005 | 33 ha | 16 ha | 48 ha |
| 2006 | 32 ha | 14 ha | 46 ha |
| 2007 | 79 ha | 23 ha | 102 ha |
| 2008 | 26 ha | 2 ha | 28 ha |
| 2009 | 53 ha | 11 ha | 64 ha |
| 2010 | 13 ha | 3 ha | 16 ha |
| 2011 | 19 ha | 7 ha | 26 ha |
| 2012 | 70 ha | 8 ha | 79 ha |
| 2013 | 93 ha | 168 ha | 261 ha |
| 2014 | 52 ha | 62 ha | 114 ha |
| 2015 | 103 ha | 157 ha | 260 ha |
| 2016 | 83 ha | 206 ha | 289 ha |
| 2017 | 105 ha | 193 ha | 298 ha |
| 2018 | 67 ha | 191 ha | 258 ha |
| 2019 | 61 ha | 194 ha | 255 ha |
| 2020 | 55 ha | 100 ha | 155 ha |
| 2021 | 52 ha | 133 ha | 185 ha |
| 2022 | 78 ha | 105 ha | 183 ha |
| 2023 | 36 ha | 114 ha | 150 ha |
| 2024 | 20 ha | 108 ha | 128 ha |
| 2025 | 32 ha | 81 ha | 113 ha |
What is causing deforestation around Manéah?
- Shifting farmingcan grow back61% · 1,920 ha
- Towns and roadscleared for good24% · 758 ha
- Mining and energycleared for good8.4% · 265 ha
Also: farms, pasture and plantations, storms, floods and other natural causes, 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
- 20,100 ha
- Forest in 2020
- 16,700 ha
- Overall change
- −3,410 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Manéah shrank from about 20,100 hectares to 16,700 hectares, a net loss of about 3,410 hectares (−17%). New forest grew on about 310 hectares, but 3,720 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 Manéah
Same 2 km radius, same index — so they compare directly.
- Dubréka13.3 km
Guinea
- Tree cover
- 50%
- Air quality
- 82
- Freetown140.0 km
Sierra Leone
- Tree cover
- 7%
- Air quality
- 68
- Kamsar166.2 km
Guinea
- Tree cover
- 21%
- Air quality
- 58
- Makeni177.6 km
Sierra Leone
- Tree cover
- 13%
- Air quality
- 93
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Frequently asked
Questions about Manéah
What is the air quality (AQI) in Manéah right now?
The latest reading for Manéah shows an AQI of 78 (Moderate), observed Nov 10, 23:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 225 km, 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 Manéah today?
At AQI 78 (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 Manéah been like this week?
Over the last 7 days, the CAMS air-quality model put Manéah's daily AQI at 57 on average, from 29 on Nov 4 to an hourly peak of 91 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 Manéah lost since 2001?
Since 2001, the area within 10 km of Manéah has lost about 3,140 hectares of forest (about 4,400 football pitches): 33% of the forest it had in 2000. Most of it was lost to shifting farming, so much of it can grow back. About 1,220 hectares (39%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 152 hectares a year in 2021–2025, down from 251 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Manéah shrank from about 20,100 hectares to 16,700 hectares, a net loss of about 3,410 hectares (−17%). New forest grew on about 310 hectares, but 3,720 hectares were lost.
What is the tree count in Manéah?
Manéah has an estimated 101,473 trees across the 12.57 km² measured — 32.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Manéah need?
Manéah has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Manéah'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 Coyah; the tree count is an estimate derived from that cover.
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