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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 | 61 |
| 2 | Stafford | 61 |
| 3 | Tolland | 59 |
| 4 | East Hartford | 57 |
| 5 | Wauregan | 54 |
| 6 | Branford | 53 |
| 7 | Enfield | 53 |
| 8 | Middletown | 53 |
| 9 | Storrs | 53 |
| 10 | Groton | 52 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
69 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Westport | 24 |
| 2 | Winsted | 24 |
| 3 | Middlebury | 26 |
| 4 | Sherman | 26 |
| 5 | West Torrington | 27 |
| 6 | Ridgefield | 28 |
| 7 | West Cornwall | 28 |
| 8 | West Hartford | 29 |
| 9 | Fairfield | 31 |
| 10 | Guilford | 31 |
(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
69Contributors
- 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
60 Anonymous contributors60 stations
60 Anonymous Contributors
Which is the most polluted city in Connecticut?
- East Haven 61
- Stafford 61
- Tolland 59
- Branford Center 58
- Byram 58
- Central Waterford 58
- Chester Center 58
- City of Milford (balance) 58
- Cos Cob 58
- Darien 58
- Deep River Center 58
- Durham 58
- East Haddam 58
- East Norwalk 58
- Essex Village 58
- Glenville 58
- Guilford Center 58
- Higganum 58
- Long Hill 58
- Madison 58
- Madison Center 58
- Moodus 58
- New Canaan 58
- Niantic 58
- North Branford 58
- Norwalk 58
- Old Lyme 58
- Old Saybrook 58
- Old Saybrook Center 58
- Pemberwick 58
- Riverside 58
- Salem 58
- Saybrook Manor 58
- Southport 58
- Stratford 58
- West Haven 58
- Westbrook Center 58
- Woodmont 58
- Ansonia 57
- Baltic 57
- Colchester 57
- Conning Towers-Nautilus Park 57
- Cromwell 57
- Derby 57
- East Hampton 57
- East Hartford 57
- Gales Ferry 57
- Hebron 57
- Lake Pocotopaug 57
- Lisbon 57
- Mystic 57
- Noank 57
- North Haven 57
- Old Mystic 57
- Orange 57
- Oxoboxo River 57
- Poquonock Bridge 57
- Portland 57
- Preston City 57
- South Coventry 57
- South Windham 57
- Terramuggus 57
- Uncasville 57
- Wallingford 57
- Wallingford Center 57
- Willimantic 57
- Wilton 57
- Woodbridge 57
- Bethel 56
- Cheshire 56
- Cheshire Village 56
- Coventry Lake 56
- Crystal Lake 56
- Danielson 56
- East Brooklyn 56
- Easton 56
- Georgetown 56
- Glastonbury Center 56
- Jewett City 56
- Kensington 56
- Killingly Center 56
- Manchester 56
- Meriden 56
- Moosup 56
- Naugatuck 56
- New Britain 56
- Newington 56
- Newtown 56
- North Grosvenor Dale 56
- Pawcatuck 56
- Plainfield 56
- Plainfield Village 56
- Prospect 56
- Putnam 56
- Rockville 56
- Seymour 56
- South Woodstock 56
- Thompson 56
- Wethersfield 56
- Blue Hills 55
- Bristol 55
- East Windsor 55
- Ellington 55
- Heritage Village 55
- New Fairfield 55
- Oakville 55
- Plainville 55
- Quinebaug 55
- South Windsor 55
- Southbury 55
- Stafford Springs 55
- Watertown 55
- Windsor 55
- Wolcott 55
- Woodbury 55
- Woodbury Center 55
- Bethlehem Village 54
- Hazardville 54
- New Milford 54
- Plymouth 54
- Southwood Acres 54
- Terryville 54
- Thomaston 54
- Wauregan 54
- Windsor Locks 54
- Branford 53
- Canton Valley 53
- Collinsville 53
- Enfield 53
- Kent 53
- Litchfield 53
- Middletown 53
- New Preston 53
- Northwest Harwinton 53
- Sherwood Manor 53
- Simsbury Center 53
- Storrs 53
- Suffield Depot 53
- Tariffville 53
- Thompsonville 53
- Torrington 53
- Washington 53
- Weatogue 53
- West Simsbury 53
- Groton 52
- Hartford 52
- Mansfield City 52
- New Hartford Center 52
- New London 52
- Salmon Brook 52
- Waterbury 52
- Hamden 51
- North Granby 51
- Winchester Center 51
- Norwich 50
- Old Greenwich 50
- Farmington 49
- Ledyard 49
- Waterford 49
- Glastonbury 48
- Windham 48
- Bridgeport 47
- Oxford 47
- Montville Center 46
- New Haven 46
- Danbury 45
- Stamford 45
- Canaan 43
- Shelton 43
- Greenwich 42
- Clinton 38
- Trumbull 38
- Milford 37
- Pomfret Center 37
- Redding 34
- North Stamford 33
- Somers 32
- Fairfield 31
- Guilford 31
- West Hartford 29
- Ridgefield 28
- West Cornwall 28
- West Torrington 27
- Middlebury 26
- Sherman 26
- Westport 24
- Winsted 24
AQI US, Metric