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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 |  East Haven | 58 |
| 2 | Bridgeport | 54 |
| 3 | Stafford | 44 |
| 4 | Storrs | 44 |
| 5 | Trumbull | 44 |
| 6 | Windham | 44 |
| 7 | Farmington | 43 |
| 8 | Tolland | 43 |
| 9 | Glastonbury | 42 |
| 10 | East Hartford | 41 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
73 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Woodbridge | 17 |
| 2 | Guilford | 21 |
| 3 | North Stamford | 22 |
| 4 | Hebron | 25 |
| 5 | Waterford | 27 |
| 6 | West Hartford | 27 |
| 7 | Southington | 28 |
| 8 | Wauregan | 29 |
| 9 | Enfield | 30 |
| 10 | Old Greenwich | 30 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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News
The latest air quality news and resources.
Connecticut air quality data attribution
73Contributors
- EPA Office of Atmospheric Protection
1 station
3 Government Contributors
- AirGradient
1 station
Corporate Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
D&S1 station
5 Individual Contributors
64 Anonymous contributors64 stations
64 Anonymous Contributors
Which is the most polluted city in Connecticut?
- East Haven 58
- Bridgeport 54
- Stafford 44
- Storrs 44
- Trumbull 44
- Windham 44
- Farmington 43
- Stratford 43
- Tolland 43
- Glastonbury 42
- East Hartford 41
- Hamden 41
- New Haven 41
- Niantic 41
- Old Lyme 41
- Old Saybrook Center 41
- Saybrook Manor 41
- Stamford 41
- Fairfield 40
- Madison 40
- Old Saybrook 40
- Westbrook Center 40
- Central Waterford 39
- Essex Village 39
- Hartford 39
- Long Hill 39
- Madison Center 39
- Mansfield City 39
- Milford 39
- Noank 39
- Poquonock Bridge 39
- Shelton 39
- Chester Center 38
- Conning Towers-Nautilus Park 38
- Deep River Center 38
- Guilford Center 38
- Mystic 38
- Redding 38
- Clinton 37
- Gales Ferry 37
- Old Mystic 37
- Oxoboxo River 37
- Uncasville 37
- Waterbury 37
- East Haddam 36
- Ledyard 36
- Middletown 36
- Norwich 36
- Pawcatuck 36
- Salem 36
- Winsted 36
- Branford Center 35
- Groton 35
- North Branford 35
- Montville Center 34
- Moodus 34
- Oxford 34
- Pomfret Center 34
- Preston City 34
- Colchester 33
- Danbury 33
- Middlebury 33
- Ridgefield 33
- Sherman 33
- West Haven 33
- Westport 33
- Woodmont 33
- Byram 32
- City of Milford (balance) 32
- Greenwich 32
- Higganum 32
- Jewett City 32
- Lisbon 32
- New London 32
- Pemberwick 32
- Somers 32
- Woodbury 32
- Baltic 31
- Branford 31
- Cos Cob 31
- Durham 31
- East Hampton 31
- Glenville 31
- Orange 31
- Riverside 31
- Southport 31
- West Torrington 31
- Darien 30
- East Norwalk 30
- Enfield 30
- Lake Pocotopaug 30
- Moosup 30
- North Haven 30
- Norwalk 30
- Old Greenwich 30
- Plainfield 30
- Plainfield Village 30
- Portland 30
- South Windham 30
- Terramuggus 30
- Wallingford 30
- Wallingford Center 30
- West Cornwall 30
- Ansonia 29
- Cromwell 29
- Danielson 29
- Derby 29
- New Canaan 29
- Wauregan 29
- Willimantic 29
- Cheshire 28
- Cheshire Village 28
- Coventry Lake 28
- East Brooklyn 28
- Easton 28
- Georgetown 28
- Glastonbury Center 28
- Killingly Center 28
- Meriden 28
- Putnam 28
- Seymour 28
- South Coventry 28
- Southington 28
- Wilton 28
- Bethel 27
- Kensington 27
- Manchester 27
- Naugatuck 27
- North Grosvenor Dale 27
- Prospect 27
- Quinebaug 27
- Rockville 27
- South Woodstock 27
- Thompson 27
- Waterford 27
- West Hartford 27
- Wethersfield 27
- Crystal Lake 26
- East Windsor 26
- Ellington 26
- New Britain 26
- Newington 26
- Newtown 26
- South Windsor 26
- Blue Hills 25
- Hazardville 25
- Hebron 25
- Heritage Village 25
- New Fairfield 25
- Plainville 25
- Southbury 25
- Southwood Acres 25
- Windsor 25
- Windsor Locks 25
- Wolcott 25
- Woodbury Center 25
- Bristol 24
- Oakville 24
- Sherwood Manor 24
- Suffield Depot 24
- Thompsonville 24
- Watertown 24
- Bethlehem Village 23
- New Milford 23
- Plymouth 23
- Tariffville 23
- Terryville 23
- Thomaston 23
- Weatogue 23
- Canton Valley 22
- Collinsville 22
- Kent 22
- Litchfield 22
- New Hartford Center 22
- New Preston 22
- North Granby 22
- North Stamford 22
- Northwest Harwinton 22
- Salmon Brook 22
- Simsbury Center 22
- Stafford Springs 22
- Torrington 22
- Washington 22
- West Simsbury 22
- Winchester Center 22
- Canaan 21
- Guilford 21
- Woodbridge 17
AQI US, Metric