City report · French Guiana
Cayenne Air quality today
Air quality in Cayenne currently reads AQI 50 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 50
Good
- PM2.5, fine particles (µg/m³)
- 9.0
- tree cover
- 48.5%
- trees in this area
- 94.2K
- more trees needed
- 0
Measured across a 2 km radius around Centre-Ville, Cayenne, French Guiana (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Cayenne · AQI 50 (Good)
Cayenne's tree count comes to 94,163 trees across 7.77 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Cayenne today: AQI 50, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Cayenne-Bouchon, 2.4 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
9.0
PM10
20.5
NO₂
—
O₃
—
SO₂
—
CO
1556.0
Data: OpenAQ · EEA
- 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 Cayenne's daily AQI at 22 on average, from 15 on Nov 9 to an hourly peak of 44 on Nov 7.
Where Cayenne stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Cayenne: Healthy tree cover
48.5% tree cover against a 30% healthy-neighborhood target, across 7.77 km² of land.
Trees in this area
94,163
Target trees
94,163
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Cayenne lost?
Since 2001, the area within 10 km of Cayenne has lost about 1,870 hectares of forest (about 2,600 football pitches): 19% of the forest it had in 2000. Most of it (92%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 1,870 haabout 2,600 football pitches
- Share of its forest
- 19%of what there was in 2000
- Cleared for good
- 1,730 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 59 hectares a year in 2021–2025, down from 88 hectares a year in 2016–2020. The worst year was 2012, when about 144 hectares of forest were lost.
Cayenne's full deforestation reportHectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 65 ha | 3 ha | 68 ha |
| 2002 | 44 ha | 1 ha | 45 ha |
| 2003 | 39 ha | 2 ha | 41 ha |
| 2004 | 92 ha | 4 ha | 96 ha |
| 2005 | 48 ha | 2 ha | 50 ha |
| 2006 | 55 ha | 2 ha | 58 ha |
| 2007 | 78 ha | 2 ha | 80 ha |
| 2008 | 99 ha | 2 ha | 101 ha |
| 2009 | 75 ha | 19 ha | 94 ha |
| 2010 | 106 ha | 2 ha | 108 ha |
| 2011 | 73 ha | 1 ha | 74 ha |
| 2012 | 139 ha | 5 ha | 144 ha |
| 2013 | 68 ha | 4 ha | 72 ha |
| 2014 | 55 ha | 3 ha | 58 ha |
| 2015 | 43 ha | 4 ha | 47 ha |
| 2016 | 137 ha | 7 ha | 144 ha |
| 2017 | 82 ha | 13 ha | 95 ha |
| 2018 | 99 ha | 8 ha | 107 ha |
| 2019 | 45 ha | 1 ha | 46 ha |
| 2020 | 45 ha | 3 ha | 48 ha |
| 2021 | 40 ha | 2 ha | 42 ha |
| 2022 | 56 ha | 28 ha | 84 ha |
| 2023 | 62 ha | 5 ha | 68 ha |
| 2024 | 58 ha | 19 ha | 77 ha |
| 2025 | 25 ha | 1 ha | 27 ha |
What is causing deforestation around Cayenne?
- Towns and roadscleared for good80% · 1,490 ha
- Farms, pasture and plantationscleared for good13% · 235 ha
- Storms, floods and other natural causescan grow back4.7% · 88 ha
Also: shifting farming, mining and energy, 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
- 8,220 ha
- Forest in 2020
- 7,530 ha
- Overall change
- −684 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Cayenne shrank from about 8,220 hectares to 7,530 hectares, a net loss of about 684 hectares (−8.3%). New forest grew on about 247 hectares, but 930 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 Cayenne
Same 2 km radius, same index — so they compare directly.
- Paramaribo330.1 km
Suriname
- Tree cover
- 31%
- Air quality
- 32
- Macapá562.7 km
Brazil
- Tree cover
- 9%
- Air quality
- 38
- Santana568.1 km
Brazil
- Tree cover
- 23%
- Air quality
- 27
- New Amsterdam591.6 km
Guyana
- Tree cover
- 32%
- Air quality
- 38
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Frequently asked
Questions about Cayenne
What is the air quality (AQI) in Cayenne right now?
The latest reading for Cayenne shows an AQI of 50 (Good), measured Nov 11, 11:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Cayenne-Bouchon, 2.4 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Cayenne today?
At AQI 50 (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 Cayenne been like this week?
Over the last 7 days, the CAMS air-quality model put Cayenne's daily AQI at 22 on average, from 15 on Nov 9 to an hourly peak of 44 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 Cayenne lost since 2001?
Since 2001, the area within 10 km of Cayenne has lost about 1,870 hectares of forest (about 2,600 football pitches): 19% of the forest it had in 2000. Most of it (92%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is slowing down: about 59 hectares a year in 2021–2025, down from 88 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Cayenne shrank from about 8,220 hectares to 7,530 hectares, a net loss of about 684 hectares (−8.3%). New forest grew on about 247 hectares, but 930 hectares were lost.
What is the tree count in Cayenne?
Cayenne has an estimated 94,163 trees across the 7.77 km² of land measured — 48.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Cayenne need?
Cayenne has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Cayenne's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Centre-Ville, 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 Centre-Ville; the tree count is an estimate derived from that cover.
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