United States · Connecticut · 6 places
Air quality in Connecticut today The AQI right now, city by city
Right now, Bridgeport has the cleanest air of the 5 Connecticut cities we track (AQI 17, Good), and Waterbury the worst (AQI 77, Moderate). Waterbury has the most tree cover, at 52.3% — #12 of 278 large US cities.
Every place is measured the same way, over the same 1.2 mi (2 km) around its center: the air quality right now, from ground stations where there are any, and its tree cover.
Average right now
AQI 33
Good
- places tracked
- 6
- average tree cover
- 31.1%
- US cities: 25.1%
- worst air now: Waterbury
- 77
- cleanest air now: Bridgeport
- 17
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Connecticut · average AQI 33
Air quality today across Connecticut, city by city
| Bridgeport | 17Good | 14.4% | 44.7K | #197 of 278 |
|---|---|---|---|---|
| New Haven | 24Good | 30.3% | — | #93 of 278 |
| Stamford | 26Good | 28.3% | 5.3K | #109 of 278 |
| North Stamford | 23Good | 90.5% | — | — |
| Hartford | 19Good | 30.0% | — | #96 of 278 |
| Waterbury | 77Moderate | 52.3% | — | #12 of 278 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 1.2 mi (2 km) of each city center from Sentinel-2 imagery. The US greenness rank covers cities of 100,000+ people; see the full ranking.
Deforestation · 2001–2025
How much forest has Connecticut lost?
Since 2001, Connecticut has lost about 65,500 acres (26,500 hectares) of forest (about 50,000 football fields): 2.7% of the forest it had in 2000. Most of it (53%) was deforestation, forest cleared for good, mainly for towns and roads.
- Forest lost since 2001
- 65,500 acres (26,500 ha)about 50,000 football fields
- Share of its forest
- 2.7%of what there was in 2000
- Cleared for good
- 34,900 acres (14,100 ha)deforestation: turned into farms, mines or towns
Acres of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 1,340 acres (543 ha) | 670 acres (271 ha) | 2,010 acres (814 ha) |
| 2002 | 1,610 acres (652 ha) | 907 acres (367 ha) | 2,520 acres (1,020 ha) |
| 2003 | 1,160 acres (468 ha) | 489 acres (198 ha) | 1,650 acres (666 ha) |
| 2004 | 1,950 acres (789 ha) | 744 acres (301 ha) | 2,690 acres (1,090 ha) |
| 2005 | 2,220 acres (898 ha) | 820 acres (332 ha) | 3,040 acres (1,230 ha) |
| 2006 | 2,320 acres (937 ha) | 986 acres (399 ha) | 3,300 acres (1,340 ha) |
| 2007 | 1,670 acres (677 ha) | 768 acres (311 ha) | 2,440 acres (988 ha) |
| 2008 | 1,460 acres (592 ha) | 853 acres (345 ha) | 2,320 acres (937 ha) |
| 2009 | 833 acres (337 ha) | 647 acres (262 ha) | 1,480 acres (599 ha) |
| 2010 | 1,280 acres (518 ha) | 1,030 acres (417 ha) | 2,310 acres (935 ha) |
| 2011 | 647 acres (262 ha) | 576 acres (233 ha) | 1,220 acres (495 ha) |
| 2012 | 937 acres (379 ha) | 966 acres (391 ha) | 1,900 acres (770 ha) |
| 2013 | 536 acres (217 ha) | 887 acres (359 ha) | 1,420 acres (576 ha) |
| 2014 | 892 acres (361 ha) | 981 acres (397 ha) | 1,870 acres (758 ha) |
| 2015 | 959 acres (388 ha) | 966 acres (391 ha) | 1,920 acres (779 ha) |
| 2016 | 1,610 acres (651 ha) | 2,390 acres (969 ha) | 4,000 acres (1,620 ha) |
| 2017 | 2,030 acres (822 ha) | 3,190 acres (1,290 ha) | 5,220 acres (2,110 ha) |
| 2018 | 1,840 acres (744 ha) | 1,600 acres (649 ha) | 3,440 acres (1,390 ha) |
| 2019 | 1,420 acres (573 ha) | 1,780 acres (720 ha) | 3,200 acres (1,290 ha) |
| 2020 | 1,500 acres (609 ha) | 1,620 acres (656 ha) | 3,130 acres (1,270 ha) |
| 2021 | 1,380 acres (559 ha) | 1,420 acres (575 ha) | 2,800 acres (1,130 ha) |
| 2022 | 1,560 acres (631 ha) | 1,660 acres (670 ha) | 3,210 acres (1,300 ha) |
| 2023 | 1,040 acres (422 ha) | 1,210 acres (490 ha) | 2,250 acres (912 ha) |
| 2024 | 1,290 acres (524 ha) | 1,450 acres (586 ha) | 2,740 acres (1,110 ha) |
| 2025 | 1,370 acres (553 ha) | 2,020 acres (817 ha) | 3,390 acres (1,370 ha) |
Forest loss has stayed about the same: about 2,880 acres (1,170 hectares) a year in 2021–2025, against 3,800 acres (1,540 hectares) a year in 2016–2020. The worst year was 2017, when about 5,220 acres (2,110 hectares) of forest were lost.
What is causing deforestation in Connecticut?
- Towns and roadscleared for good46% · 30,000 acres (12,100 ha)
- Loggingcan grow back43% · 27,900 acres (11,300 ha)
- Farms, pasture and plantationscleared for good5.4% · 3,520 acres (1,420 ha)
Also: mining and energy, 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.
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. How it's measured
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