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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 |  Ridgefield | 60 |
| 2 | Stafford | 55 |
| 3 | Enfield | 54 |
| 4 | Hartford | 54 |
| 5 | Storrs | 53 |
| 6 | West Cornwall | 53 |
| 7 | West Torrington | 53 |
| 8 | Windham | 53 |
| 9 | East Hartford | 52 |
| 10 | Glastonbury | 52 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
68 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Southington | 11 |
| 2 | Guilford | 14 |
| 3 | Groton | 18 |
| 4 | Ledyard | 18 |
| 5 | Montville Center | 19 |
| 6 | New London | 21 |
| 7 | Westport | 25 |
| 8 | Branford | 29 |
| 9 | Wauregan | 30 |
| 10 | Greenwich | 32 |
(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
68Contributors
- EPA Office of Atmospheric Protection
1 station
3 Government Contributors
- 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?
- Ridgefield 60
- Byram 57
- Cos Cob 57
- Glenville 57
- Pemberwick 57
- Riverside 57
- Ansonia 56
- Bethel 56
- Blue Hills 56
- Cheshire 56
- Cheshire Village 56
- City of Milford (balance) 56
- Coventry Lake 56
- Cromwell 56
- Crystal Lake 56
- Darien 56
- Derby 56
- East Norwalk 56
- East Windsor 56
- Easton 56
- Ellington 56
- Georgetown 56
- Glastonbury Center 56
- Hazardville 56
- Heritage Village 56
- Kensington 56
- Manchester 56
- Meriden 56
- Milford 56
- Naugatuck 56
- New Britain 56
- New Canaan 56
- Newington 56
- North Grosvenor Dale 56
- Norwalk 56
- Orange 56
- Prospect 56
- Putnam 56
- Quinebaug 56
- Rockville 56
- Seymour 56
- Sherwood Manor 56
- South Coventry 56
- South Windsor 56
- South Woodstock 56
- Southbury 56
- Southport 56
- Southwood Acres 56
- Stafford Springs 56
- Stratford 56
- Suffield Depot 56
- Tariffville 56
- Thompson 56
- Thompsonville 56
- Wethersfield 56
- Wilton 56
- Windsor 56
- Windsor Locks 56
- Wolcott 56
- Woodmont 56
- Bethlehem Village 55
- Branford Center 55
- Bristol 55
- Canton Valley 55
- Colchester 55
- Collinsville 55
- Danielson 55
- Durham 55
- East Brooklyn 55
- East Haddam 55
- East Hampton 55
- Farmington 55
- Guilford Center 55
- Hebron 55
- Higganum 55
- Killingly Center 55
- Lake Pocotopaug 55
- Litchfield 55
- Moodus 55
- New Fairfield 55
- New Hartford Center 55
- New Milford 55
- New Preston 55
- North Branford 55
- North Granby 55
- North Haven 55
- Northwest Harwinton 55
- Oakville 55
- Plainville 55
- Plymouth 55
- Portland 55
- Salmon Brook 55
- Simsbury Center 55
- South Windham 55
- Stafford 55
- Terramuggus 55
- Terryville 55
- Thomaston 55
- Torrington 55
- Wallingford 55
- Wallingford Center 55
- Washington 55
- Watertown 55
- Weatogue 55
- West Haven 55
- West Simsbury 55
- Willimantic 55
- Winchester Center 55
- Woodbury 55
- Woodbury Center 55
- Baltic 54
- Canaan 54
- Chester Center 54
- Deep River Center 54
- Enfield 54
- Essex Village 54
- Hartford 54
- Kent 54
- Madison 54
- Madison Center 54
- Moosup 54
- Plainfield 54
- Plainfield Village 54
- Salem 54
- Jewett City 53
- Lisbon 53
- Old Lyme 53
- Old Saybrook 53
- Old Saybrook Center 53
- Saybrook Manor 53
- Storrs 53
- West Cornwall 53
- West Torrington 53
- Westbrook Center 53
- Windham 53
- East Hartford 52
- Gales Ferry 52
- Glastonbury 52
- Middletown 52
- Newtown 52
- Niantic 52
- Oxford 52
- Oxoboxo River 52
- Preston City 52
- Tolland 52
- Uncasville 52
- Waterbury 52
- Central Waterford 51
- Conning Towers-Nautilus Park 51
- Long Hill 51
- Somers 51
- Middlebury 50
- Mansfield City 49
- Old Mystic 49
- Poquonock Bridge 49
- Mystic 48
- Noank 48
- Shelton 47
- Pawcatuck 46
- Trumbull 46
- West Hartford 45
- Danbury 44
- East Haven 44
- Redding 43
- Woodbridge 43
- New Haven 42
- Old Greenwich 41
- Sherman 41
- Winsted 41
- Bridgeport 40
- Clinton 38
- Fairfield 37
- Norwich 36
- Stamford 35
- Hamden 33
- North Stamford 33
- Pomfret Center 33
- Waterford 33
- Greenwich 32
- Wauregan 30
- Branford 29
- Westport 25
- New London 21
- Montville Center 19
- Groton 18
- Ledyard 18
- Guilford 14
- Southington 11
AQI US, Metric