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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 | 46 |
| 2 | Stafford | 41 |
| 3 | Bridgeport | 39 |
| 4 | Glastonbury | 39 |
| 5 | Shelton | 39 |
| 6 | Clinton | 38 |
| 7 | East Hartford | 38 |
| 8 | Ledyard | 38 |
| 9 | Norwich | 38 |
| 10 | Redding | 38 |
(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 | North Stamford | 16 |
| 2 | Ridgefield | 16 |
| 3 | Guilford | 21 |
| 4 | Wauregan | 21 |
| 5 | Waterford | 22 |
| 6 | West Hartford | 23 |
| 7 | Old Greenwich | 24 |
| 8 | Enfield | 25 |
| 9 | Hebron | 25 |
| 10 | Milford | 25 |
(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
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 46
- Stafford 41
- Stratford 41
- Niantic 40
- Old Saybrook Center 40
- Saybrook Manor 40
- Bridgeport 39
- Central Waterford 39
- Glastonbury 39
- Noank 39
- Old Lyme 39
- Old Saybrook 39
- Poquonock Bridge 39
- Shelton 39
- Westbrook Center 39
- Clinton 38
- East Hartford 38
- Ledyard 38
- Long Hill 38
- Madison 38
- Norwich 38
- Redding 38
- Woodbridge 38
- Conning Towers-Nautilus Park 37
- Mansfield City 37
- Montville Center 37
- Mystic 37
- New Haven 37
- Fairfield 36
- Farmington 36
- Groton 36
- Madison Center 36
- Old Mystic 36
- Stamford 36
- Storrs 36
- Essex Village 35
- Gales Ferry 35
- Greenwich 35
- Guilford Center 35
- Hartford 35
- Pawcatuck 35
- Windham 35
- Deep River Center 34
- Hamden 34
- Middletown 34
- Oxford 34
- Oxoboxo River 34
- Uncasville 34
- Waterbury 34
- Chester Center 33
- Pomfret Center 33
- Sherman 33
- Tolland 33
- Branford Center 32
- Byram 32
- Preston City 32
- Riverside 32
- Winsted 32
- Cos Cob 31
- Darien 31
- East Haddam 31
- Middlebury 31
- North Branford 31
- Pemberwick 31
- Salem 31
- Southington 31
- Woodbury 31
- Woodmont 31
- City of Milford (balance) 30
- East Norwalk 30
- Glenville 30
- Southport 30
- Westport 30
- Baltic 29
- Jewett City 29
- Lisbon 29
- Moodus 29
- Norwalk 29
- Somers 29
- Trumbull 29
- West Haven 29
- Branford 28
- Colchester 28
- New London 28
- Orange 28
- Danbury 27
- Durham 27
- Higganum 27
- New Canaan 27
- Ansonia 26
- Derby 26
- East Hampton 26
- Lake Pocotopaug 26
- North Haven 26
- Plainfield 26
- Plainfield Village 26
- South Windham 26
- Terramuggus 26
- Wallingford Center 26
- Cromwell 25
- Easton 25
- Enfield 25
- Hebron 25
- Milford 25
- Moosup 25
- Portland 25
- Seymour 25
- Wallingford 25
- West Cornwall 25
- West Torrington 25
- Willimantic 25
- Wilton 25
- Cheshire 24
- Cheshire Village 24
- Coventry Lake 24
- Danielson 24
- East Brooklyn 24
- Georgetown 24
- Killingly Center 24
- Meriden 24
- Old Greenwich 24
- South Coventry 24
- Bethel 23
- Bethlehem Village 23
- Blue Hills 23
- Bristol 23
- Crystal Lake 23
- Ellington 23
- Glastonbury Center 23
- Heritage Village 23
- Kensington 23
- Kent 23
- Litchfield 23
- Manchester 23
- Naugatuck 23
- New Britain 23
- New Fairfield 23
- New Milford 23
- New Preston 23
- Newington 23
- Newtown 23
- North Grosvenor Dale 23
- Northwest Harwinton 23
- Oakville 23
- Plainville 23
- Plymouth 23
- Prospect 23
- Putnam 23
- Rockville 23
- South Windsor 23
- South Woodstock 23
- Southbury 23
- Terryville 23
- Thomaston 23
- Thompson 23
- Torrington 23
- Washington 23
- Watertown 23
- Weatogue 23
- West Hartford 23
- Wethersfield 23
- Windsor 23
- Wolcott 23
- Woodbury Center 23
- Canaan 22
- Canton Valley 22
- Collinsville 22
- East Windsor 22
- Hazardville 22
- New Hartford Center 22
- North Granby 22
- Quinebaug 22
- Salmon Brook 22
- Sherwood Manor 22
- Simsbury Center 22
- Southwood Acres 22
- Stafford Springs 22
- Suffield Depot 22
- Tariffville 22
- Thompsonville 22
- Waterford 22
- West Simsbury 22
- Winchester Center 22
- Windsor Locks 22
- Guilford 21
- Wauregan 21
- North Stamford 16
- Ridgefield 16
AQI US, Metric