City report · Saint Pierre and Miquelon
Saint-Pierre Air quality today
Air quality in Saint-Pierre currently reads AQI 22 (Good): Air quality is satisfactory for everyone.
AQI 22
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 3.7
- tree cover
- 24.0%
- trees in this area
- 58.1K
- more trees needed
- 14.5K
Measured across a 2 km radius around Saint-Pierre 97500, St Pierre and Miquelon (12.57 km²), from a satellite image of Aug 16, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Saint-Pierre · AQI 22 (Good)
Saint-Pierre's tree count comes to 58,132 trees across 9.69 km² of land, 6 points below the 30% tree-cover level considered healthy for this area, so roughly 14,533 more trees would close the gap.
Air quality detail
Air quality in Saint-Pierre today: AQI 22, Good
Main pollutant: PM2.5 · Observed Nov 11, 01:00 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
3.7
PM10
5.9
NO₂
0.6
O₃
63.0
SO₂
0.3
CO
118.0
- 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 Saint-Pierre's daily AQI at 39 on average, from 23 on Nov 11 to an hourly peak of 58 on Nov 6.
Where Saint-Pierre stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Saint-Pierre: Below target
24.0% tree cover against a 30% healthy-neighborhood target, across 9.69 km² of land.
Trees in this area
58,132
Target trees
72,665
More trees needed
14,533
CO₂ if planted / yr
319.7 t
Deforestation · 2001–2025
How much forest has Saint-Pierre lost?
Since 2001, the area within 10 km of Saint-Pierre has lost about 1 hectare of forest: under 1% of the forest it had in 2000. Most of it (50%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 1 ha
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- under 1 hadeforestation: turned into farms, mines or towns
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 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Saint-Pierre?
- Towns and roadscleared for good50% · under 1 ha
- Unknown causescause unknown43% · under 1 ha
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
- 180 ha
- Forest in 2020
- 176 ha
- Overall change
- −4 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Saint-Pierre stayed about the same size, at about 176 hectares: new forest grew on about 4 hectares, and about 7 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 Saint-Pierre
Same 2 km radius, same index — so they compare directly.
- St. John's276.3 km
Canada
- Tree cover
- 47%
- Air quality
- 33
- Sydney315.1 km
Canada
- Tree cover
- 32%
- Air quality
- 20
- Halifax621.4 km
Canada
- Tree cover
- 37%
- Air quality
- 19
- Saguenay1129.2 km
Canada
- Tree cover
- 40%
- Air quality
- 19
- Québec1143.0 km
Canada
- Tree cover
- 22%
- Air quality
- 17
- Sherbrooke1220.0 km
Canada
- Tree cover
- 40%
- Air quality
- 16
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Frequently asked
Questions about Saint-Pierre
What is the air quality (AQI) in Saint-Pierre right now?
The latest reading for Saint-Pierre shows an AQI of 22 (Good), observed Nov 11, 01:00 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 Saint-Pierre today?
At AQI 22 (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 Saint-Pierre been like this week?
Over the last 7 days, the CAMS air-quality model put Saint-Pierre's daily AQI at 39 on average, from 23 on Nov 11 to an hourly peak of 58 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Saint-Pierre lost since 2001?
Since 2001, the area within 10 km of Saint-Pierre has lost about 1 hectare of forest: under 1% of the forest it had in 2000. Most of it (50%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Saint-Pierre stayed about the same size, at about 176 hectares: new forest grew on about 4 hectares, and about 7 hectares were lost.
What is the tree count in Saint-Pierre?
Saint-Pierre has an estimated 58,132 trees across the 9.69 km² of land measured — 24.0% tree cover, 6 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Saint-Pierre need?
Saint-Pierre needs roughly 14,533 more trees to close a 6-point shortfall against its 30% tree-cover target — about 319.7 t of extra CO₂ absorbed per year once grown.
How are Saint-Pierre'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 Saint-Pierre 97500; the tree count is an estimate derived from that cover.
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