City report · Connecticut, United States
North Stamford Air quality today
Air quality in North Stamford currently reads AQI 169 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 169
Unhealthy
- PM2.5, fine particles (µg/m³)
- 81.1
- tree cover
- 90.5%
- trees in this area
- 277K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around North Stamford, Stamford, CT, USA (4.9 sq mi), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
North Stamford · AQI 169 (Unhealthy)
North Stamford's tree count comes to 277,491 trees across 4.7 sq mi (12.27 km²) of land, already at or above the 40% tree-cover level considered healthy for this area.
Air quality detail
Air quality in North Stamford today: AQI 169, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · New Canaan CT, 4.0 mi (6.5 km) away
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
81.1
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, CCPATollFree.com
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put North Stamford's daily AQI at 39 on average, from 18 on Nov 8 to an hourly peak of 84 on Nov 6.
Where North Stamford stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in North Stamford: Healthy tree cover
90.5% tree cover against a 40% healthy-neighborhood target, across 4.7 sq mi (12.27 km²) of land.
Trees in this area
277,491
Target trees
277,491
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has North Stamford lost?
Since 2001, the area within 10 km of North Stamford has lost about 1,100 acres (446 hectares) of forest (about 830 football fields): 1.7% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 4 km northeast of the city center.
- Forest lost since 2001
- 1,100 acres (446 ha)about 830 football fields
- Share of its forest
- 1.7%of what there was in 2000
- Cleared for good
- 1,020 acres (412 ha)deforestation: turned into farms, mines or towns
The worst year was 2005, when about 116 acres (47 hectares) of forest were lost.
Acres of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 33 acres (14 ha) | 4 acres (2 ha) | 38 acres (15 ha) |
| 2002 | 33 acres (13 ha) | 4 acres (2 ha) | 37 acres (15 ha) |
| 2003 | 10 acres (4 ha) | under 1 ha | 12 acres (5 ha) |
| 2004 | 30 acres (12 ha) | under 1 ha | 32 acres (13 ha) |
| 2005 | 112 acres (45 ha) | 4 acres (2 ha) | 116 acres (47 ha) |
| 2006 | 82 acres (33 ha) | 6 acres (2 ha) | 88 acres (35 ha) |
| 2007 | 46 acres (19 ha) | 5 acres (2 ha) | 52 acres (21 ha) |
| 2008 | 34 acres (14 ha) | 6 acres (2 ha) | 40 acres (16 ha) |
| 2009 | 16 acres (6 ha) | under 1 ha | 17 acres (7 ha) |
| 2010 | 21 acres (9 ha) | 5 acres (2 ha) | 26 acres (11 ha) |
| 2011 | 17 acres (7 ha) | under 1 ha | 19 acres (8 ha) |
| 2012 | 31 acres (13 ha) | 10 acres (4 ha) | 41 acres (17 ha) |
| 2013 | 17 acres (7 ha) | under 1 ha | 19 acres (8 ha) |
| 2014 | 20 acres (8 ha) | under 1 ha | 21 acres (8 ha) |
| 2015 | 29 acres (12 ha) | under 1 ha | 31 acres (13 ha) |
| 2016 | 49 acres (20 ha) | 5 acres (2 ha) | 54 acres (22 ha) |
| 2017 | 70 acres (29 ha) | 3 acres (1 ha) | 74 acres (30 ha) |
| 2018 | 63 acres (25 ha) | 3 acres (1 ha) | 65 acres (26 ha) |
| 2019 | 40 acres (16 ha) | under 1 ha | 42 acres (17 ha) |
| 2020 | 57 acres (23 ha) | under 1 ha | 59 acres (24 ha) |
| 2021 | 47 acres (19 ha) | 2 acres (1 ha) | 50 acres (20 ha) |
| 2022 | 48 acres (19 ha) | under 1 ha | 48 acres (20 ha) |
| 2023 | 16 acres (7 ha) | under 1 ha | 16 acres (7 ha) |
| 2024 | 25 acres (10 ha) | under 1 ha | 26 acres (11 ha) |
| 2025 | 73 acres (29 ha) | 9 acres (4 ha) | 82 acres (33 ha) |
What is causing deforestation around North Stamford?
- Towns and roadscleared for good92% · 1,010 acres (409 ha)
- Loggingcan grow back1.2% · 13 acres (5 ha)
- Unknown causescause unknown6.3% · 69 acres (28 ha)
Also: farms, pasture and plantations.
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
- 69,300 acres (28,000 ha)
- Forest in 2020
- 69,100 acres (28,000 ha)
- Overall change
- −106 acres (43 ha)less forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around North Stamford stayed about the same size, at about 69,100 acres (28,000 hectares): new forest grew on about 376 acres (152 hectares), and about 482 acres (195 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 North Stamford
Same 2 km radius, same index — so they compare directly.
- Bridgeport30.0 km
United States
- Tree cover
- 14%
- Air quality
- 12
- Yonkers37.6 km
United States
- Tree cover
- 46%
- Air quality
- 26
- The Bronx42.0 km
United States
- Tree cover
- 30%
- Air quality
- 41
- Manhattan53.1 km
United States
- Tree cover
- 40%
- Air quality
- 39
- New Haven54.8 km
United States
- Tree cover
- 30%
- Air quality
- 13
- Queens56.4 km
United States
- Tree cover
- 12%
- Air quality
- 34
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Frequently asked
Questions about North Stamford
What is the air quality (AQI) in North Stamford right now?
The latest reading for North Stamford shows an AQI of 169 (Unhealthy), measured Nov 11, 11:00 local time by the New Canaan CT ground monitoring station, 4.0 mi (6.5 km) away, via OpenAQ. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in North Stamford today?
At AQI 169 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in North Stamford been like this week?
Over the last 7 days, the CAMS air-quality model put North Stamford's daily AQI at 39 on average, from 18 on Nov 8 to an hourly peak of 84 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 North Stamford lost since 2001?
Since 2001, the area within 10 km of North Stamford has lost about 1,100 acres (446 hectares) of forest (about 830 football fields): 1.7% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around North Stamford stayed about the same size, at about 69,100 acres (28,000 hectares): new forest grew on about 376 acres (152 hectares), and about 482 acres (195 hectares) were lost.
What is the tree count in North Stamford?
North Stamford has an estimated 277,491 trees across the 4.7 sq mi (12.27 km²) of land measured — 90.5% tree cover, already past the 40% tree-cover target set for this area.
How many more trees does North Stamford need?
North Stamford has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are North Stamford's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near North Stamford, 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 1.2 mi (2 km) radius around North Stamford; the tree count is an estimate derived from that cover.
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