City report · United States
Manchester Air quality today
Air quality in Manchester currently reads AQI 20 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 20
Good
- PM2.5, fine particles (µg/m³)
- 1.1
- tree cover
- 33.7%
- trees in this area
- 103K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around Corey Square, Manchester, NH, USA (4.9 sq mi), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Manchester · AQI 20 (Good)
Manchester's tree count comes to 103,331 trees across 4.7 sq mi (12.27 km²) of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Manchester today: AQI 20, Good
Main pollutant: Ozone · Observed Nov 11, 09:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Londonderry - Moose, 9.9 mi (16 km) away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.1
PM10
—
NO₂
1.7
O₃
43.2
SO₂
3.7
CO
114.6
Data: OpenAQ · AirNow
- 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 Manchester's daily AQI at 28 on average, from 22 on Nov 6 to an hourly peak of 74 on Nov 4.
Where Manchester stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Manchester: Healthy tree cover
33.7% tree cover against a 30% healthy-neighborhood target, across 4.7 sq mi (12.27 km²) of land.
Trees in this area
103,331
Target trees
103,331
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Manchester lost?
Since 2001, the area within 10 km of Manchester has lost about 5,200 acres (2,110 hectares) of forest (about 3,900 football fields): 10% of the forest it had in 2000. Most of it (69%) 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 northeast of the city center.
- Forest lost since 2001
- 5,200 acres (2,110 ha)about 3,900 football fields
- Share of its forest
- 10%of what there was in 2000
- Cleared for good
- 3,580 acres (1,450 ha)deforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 208 acres (84 hectares) a year in 2021–2025, against 257 acres (104 hectares) a year in 2016–2020. The worst year was 2017, when about 398 acres (161 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 | 237 acres (96 ha) | 15 acres (6 ha) | 252 acres (102 ha) |
| 2002 | 297 acres (120 ha) | 22 acres (9 ha) | 319 acres (129 ha) |
| 2003 | 121 acres (49 ha) | 22 acres (9 ha) | 142 acres (58 ha) |
| 2004 | 206 acres (83 ha) | 12 acres (5 ha) | 218 acres (88 ha) |
| 2005 | 142 acres (57 ha) | 14 acres (6 ha) | 156 acres (63 ha) |
| 2006 | 189 acres (76 ha) | 46 acres (18 ha) | 234 acres (95 ha) |
| 2007 | 142 acres (57 ha) | 49 acres (20 ha) | 190 acres (77 ha) |
| 2008 | 172 acres (70 ha) | 13 acres (5 ha) | 184 acres (75 ha) |
| 2009 | 109 acres (44 ha) | 50 acres (20 ha) | 159 acres (64 ha) |
| 2010 | 204 acres (83 ha) | 75 acres (30 ha) | 279 acres (113 ha) |
| 2011 | 90 acres (37 ha) | 47 acres (19 ha) | 138 acres (56 ha) |
| 2012 | 128 acres (52 ha) | 14 acres (6 ha) | 142 acres (57 ha) |
| 2013 | 46 acres (19 ha) | 53 acres (22 ha) | 99 acres (40 ha) |
| 2014 | 113 acres (46 ha) | 85 acres (34 ha) | 197 acres (80 ha) |
| 2015 | 105 acres (43 ha) | 64 acres (26 ha) | 169 acres (68 ha) |
| 2016 | 170 acres (69 ha) | 49 acres (20 ha) | 219 acres (89 ha) |
| 2017 | 184 acres (74 ha) | 214 acres (87 ha) | 398 acres (161 ha) |
| 2018 | 128 acres (52 ha) | 76 acres (31 ha) | 204 acres (83 ha) |
| 2019 | 139 acres (56 ha) | 136 acres (55 ha) | 274 acres (111 ha) |
| 2020 | 125 acres (51 ha) | 66 acres (27 ha) | 191 acres (77 ha) |
| 2021 | 90 acres (36 ha) | 103 acres (42 ha) | 193 acres (78 ha) |
| 2022 | 125 acres (51 ha) | 104 acres (42 ha) | 229 acres (93 ha) |
| 2023 | 119 acres (48 ha) | 175 acres (71 ha) | 294 acres (119 ha) |
| 2024 | 72 acres (29 ha) | 67 acres (27 ha) | 139 acres (56 ha) |
| 2025 | 127 acres (52 ha) | 57 acres (23 ha) | 184 acres (75 ha) |
What is causing deforestation around Manchester?
- Towns and roadscleared for good68% · 3,550 acres (1,440 ha)
- Loggingcan grow back31% · 1,610 acres (653 ha)
Also: mining and energy, farms, pasture and plantations, 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
- 51,100 acres (20,700 ha)
- Forest in 2020
- 50,900 acres (20,600 ha)
- Overall change
- −272 acres (110 ha)less forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Manchester stayed about the same size, at about 50,900 acres (20,600 hectares): new forest grew on about 1,930 acres (782 hectares), and about 2,200 acres (892 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 Manchester
Same 2 km radius, same index — so they compare directly.
- Lowell41.8 km
United States
- Tree cover
- 31%
- Air quality
- 19
- Boston77.9 km
United States
- Tree cover
- 12%
- Air quality
- 18
- Worcester86.3 km
United States
- Tree cover
- 27%
- Air quality
- 21
- Providence130.3 km
United States
- Tree cover
- 25%
- Air quality
- 31
- Springfield136.1 km
United States
- Tree cover
- 31%
- Air quality
- 12
- New Bedford157.4 km
United States
- Tree cover
- 19%
- Air quality
- 24
Build your own
Compare Manchester with anywhere
This place
Manchester
Use this data
Put Manchester's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Manchester
What is the air quality (AQI) in Manchester right now?
The latest reading for Manchester shows an AQI of 20 (Good), measured Nov 11, 09:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Londonderry - Moose, 9.9 mi (16 km) away). The main pollutant is Ozone. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Manchester today?
At AQI 20 (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 Manchester been like this week?
Over the last 7 days, the CAMS air-quality model put Manchester's daily AQI at 28 on average, from 22 on Nov 6 to an hourly peak of 74 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Manchester lost since 2001?
Since 2001, the area within 10 km of Manchester has lost about 5,200 acres (2,110 hectares) of forest (about 3,900 football fields): 10% of the forest it had in 2000. Most of it (69%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss has stayed about the same: about 208 acres (84 hectares) a year in 2021–2025, against 257 acres (104 hectares) a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Manchester stayed about the same size, at about 50,900 acres (20,600 hectares): new forest grew on about 1,930 acres (782 hectares), and about 2,200 acres (892 hectares) were lost.
What is the tree count in Manchester?
Manchester has an estimated 103,331 trees across the 4.7 sq mi (12.27 km²) of land measured — 33.7% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Manchester need?
Manchester has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Manchester's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Corey Square, 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 Corey Square; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address