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Air quality in Connecticut
Air quality index (AQI) and PM2.5 air pollution in Connecticut
LIVE AQI CITY RANKING
Real-time Connecticut
Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Bridgeport | 37 |
| 2 | Wauregan | 37 |
| 3 | East Haven | 32 |
| 4 | Stamford | 28 |
| 5 | Trumbull | 28 |
| 6 | Fairfield | 27 |
| 7 | Greenwich | 27 |
| 8 | Woodbury | 27 |
| 9 | Pomfret Center | 25 |
| 10 | Southington | 25 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
72 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Ridgefield | 5 |
| 2 | Sherman | 9 |
| 3 | Guilford | 11 |
| 4 | Hebron | 13 |
| 5 | Winsted | 14 |
| 6 | Clinton | 15 |
| 7 | Milford | 15 |
| 8 | Branford | 16 |
| 9 | New London | 16 |
| 10 | Somers | 16 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Unhealthy for sensitive groups
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News
The latest air quality news and resources.
Connecticut air quality data attribution
72Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
66 Anonymous contributors66 stations
66 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Bridgeport 37
- Byram 37
- Glenville 37
- Pemberwick 37
- Wauregan 37
- Cos Cob 35
- Old Greenwich 35
- Riverside 35
- East Haven 32
- New Canaan 32
- New Fairfield 31
- Darien 30
- Bethel 29
- Kent 29
- Wilton 29
- East Norwalk 28
- Georgetown 28
- Norwalk 28
- Stamford 28
- Trumbull 28
- Easton 27
- Fairfield 27
- Greenwich 27
- New Milford 27
- Woodbury 27
- New Preston 26
- Southport 26
- Heritage Village 25
- Pomfret Center 25
- Southington 25
- Washington 25
- Hartford 24
- Southbury 24
- Stafford 24
- Storrs 24
- Stratford 24
- Woodbury Center 24
- Ansonia 23
- Bethlehem Village 23
- Canaan 23
- Danbury 23
- Derby 23
- Litchfield 23
- Seymour 23
- Waterbury 23
- Watertown 23
- Bristol 22
- City of Milford (balance) 22
- Naugatuck 22
- New Hartford Center 22
- New Haven 22
- North Stamford 22
- Northwest Harwinton 22
- Oakville 22
- Orange 22
- Oxford 22
- Plymouth 22
- Prospect 22
- Shelton 22
- Terryville 22
- Thomaston 22
- Torrington 22
- West Haven 22
- Winchester Center 22
- Wolcott 22
- Woodbridge 22
- Woodmont 22
- Canton Valley 21
- Cheshire 21
- Cheshire Village 21
- Collinsville 21
- East Hartford 21
- Farmington 21
- Glastonbury 21
- Middlebury 21
- Montville Center 21
- North Haven 21
- Plainville 21
- Weatogue 21
- West Simsbury 21
- Blue Hills 20
- Branford Center 20
- Chester Center 20
- Colchester 20
- Coventry Lake 20
- Cromwell 20
- Crystal Lake 20
- Deep River Center 20
- Durham 20
- East Haddam 20
- East Hampton 20
- East Windsor 20
- Ellington 20
- Glastonbury Center 20
- Guilford Center 20
- Hazardville 20
- Higganum 20
- Kensington 20
- Lake Pocotopaug 20
- Madison 20
- Madison Center 20
- Manchester 20
- Meriden 20
- Moodus 20
- New Britain 20
- Newington 20
- North Branford 20
- North Granby 20
- Portland 20
- Quinebaug 20
- Redding 20
- Rockville 20
- Salmon Brook 20
- Sherwood Manor 20
- Simsbury Center 20
- South Coventry 20
- South Windham 20
- South Windsor 20
- South Woodstock 20
- Southwood Acres 20
- Stafford Springs 20
- Suffield Depot 20
- Tariffville 20
- Terramuggus 20
- Thompsonville 20
- Wallingford 20
- Wallingford Center 20
- Wethersfield 20
- Willimantic 20
- Windsor 20
- Windsor Locks 20
- Baltic 19
- Danielson 19
- East Brooklyn 19
- Essex Village 19
- Killingly Center 19
- Middletown 19
- North Grosvenor Dale 19
- Old Saybrook 19
- Old Saybrook Center 19
- Putnam 19
- Salem 19
- Saybrook Manor 19
- Thompson 19
- Westbrook Center 19
- Westport 19
- Central Waterford 18
- Conning Towers-Nautilus Park 18
- Enfield 18
- Gales Ferry 18
- Hamden 18
- Jewett City 18
- Ledyard 18
- Lisbon 18
- Long Hill 18
- Mansfield City 18
- Moosup 18
- Mystic 18
- Newtown 18
- Niantic 18
- Noank 18
- Norwich 18
- Old Lyme 18
- Old Mystic 18
- Oxoboxo River 18
- Plainfield 18
- Plainfield Village 18
- Poquonock Bridge 18
- Preston City 18
- Uncasville 18
- Windham 18
- Groton 17
- Pawcatuck 17
- West Hartford 17
- West Torrington 17
- Branford 16
- New London 16
- Somers 16
- Tolland 16
- Waterford 16
- West Cornwall 16
- Clinton 15
- Milford 15
- Winsted 14
- Hebron 13
- Guilford 11
- Sherman 9
- Ridgefield 5
AQI US, Metric