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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 |  Pomfret Center | 28 |
| 2 | Waterford | 28 |
| 3 | North Stamford | 27 |
| 4 | Wauregan | 26 |
| 5 | Ridgefield | 23 |
| 6 | New London | 22 |
| 7 | Woodbridge | 22 |
| 8 | Danbury | 21 |
| 9 | Old Greenwich | 20 |
| 10 | East Haven | 19 |
(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 | Enfield | 0 |
| 2 | Somers | 2 |
| 3 | Middlebury | 3 |
| 4 | Milford | 3 |
| 5 | Oxford | 3 |
| 6 | Storrs | 4 |
| 7 | West Hartford | 4 |
| 8 | Guilford | 5 |
| 9 | Winsted | 5 |
| 10 | Clinton | 8 |
(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
68Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
62 Anonymous contributors62 stations
62 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Canaan 56
- Kent 56
- Litchfield 56
- New Fairfield 56
- New Hartford Center 56
- New Milford 56
- New Preston 56
- North Granby 56
- Northwest Harwinton 56
- Salmon Brook 56
- Torrington 56
- Washington 56
- Winchester Center 56
- Ansonia 55
- Bethel 55
- Bethlehem Village 55
- Blue Hills 55
- Bristol 55
- Byram 55
- Canton Valley 55
- Cheshire 55
- Cheshire Village 55
- City of Milford (balance) 55
- Collinsville 55
- Cos Cob 55
- Crystal Lake 55
- Darien 55
- Derby 55
- East Norwalk 55
- East Windsor 55
- Easton 55
- Ellington 55
- Farmington 55
- Georgetown 55
- Glastonbury Center 55
- Glenville 55
- Hazardville 55
- Heritage Village 55
- Kensington 55
- Manchester 55
- Meriden 55
- Naugatuck 55
- New Britain 55
- New Canaan 55
- Newington 55
- Norwalk 55
- Oakville 55
- Pemberwick 55
- Plainville 55
- Plymouth 55
- Prospect 55
- Riverside 55
- Rockville 55
- Seymour 55
- Sherwood Manor 55
- Simsbury Center 55
- South Windsor 55
- Southbury 55
- Southport 55
- Southwood Acres 55
- Stafford Springs 55
- Stratford 55
- Suffield Depot 55
- Tariffville 55
- Terryville 55
- Thomaston 55
- Thompsonville 55
- Watertown 55
- Weatogue 55
- West Simsbury 55
- Wethersfield 55
- Wilton 55
- Windsor 55
- Windsor Locks 55
- Wolcott 55
- Woodbury Center 55
- Branford Center 54
- Colchester 54
- Coventry Lake 54
- Cromwell 54
- Durham 54
- East Hampton 54
- Guilford Center 54
- Higganum 54
- Lake Pocotopaug 54
- Madison Center 54
- Moodus 54
- North Branford 54
- North Grosvenor Dale 54
- North Haven 54
- Orange 54
- Portland 54
- Putnam 54
- Quinebaug 54
- South Coventry 54
- South Windham 54
- South Woodstock 54
- Terramuggus 54
- Thompson 54
- Wallingford 54
- Wallingford Center 54
- West Haven 54
- Willimantic 54
- Woodmont 54
- Baltic 53
- Central Waterford 53
- Chester Center 53
- Danielson 53
- Deep River Center 53
- East Brooklyn 53
- East Haddam 53
- Essex Village 53
- Gales Ferry 53
- Jewett City 53
- Killingly Center 53
- Lisbon 53
- Madison 53
- Moosup 53
- Niantic 53
- Old Saybrook 53
- Old Saybrook Center 53
- Oxoboxo River 53
- Plainfield 53
- Plainfield Village 53
- Preston City 53
- Salem 53
- Saybrook Manor 53
- Uncasville 53
- Westbrook Center 53
- Conning Towers-Nautilus Park 52
- Long Hill 52
- Mystic 52
- Noank 52
- Old Mystic 52
- Pawcatuck 52
- Poquonock Bridge 52
- Pomfret Center 28
- Waterford 28
- North Stamford 27
- Wauregan 26
- Ridgefield 23
- New London 22
- Woodbridge 22
- Danbury 21
- Old Greenwich 20
- East Haven 19
- West Cornwall 18
- West Torrington 18
- Hartford 17
- Trumbull 17
- Bridgeport 16
- Greenwich 15
- Groton 15
- Old Lyme 15
- Stamford 15
- Waterbury 15
- Stafford 14
- Fairfield 13
- Hamden 13
- Ledyard 13
- New Haven 13
- Shelton 13
- Branford 12
- Middletown 12
- Newtown 12
- Redding 12
- Westport 12
- Glastonbury 11
- Montville Center 11
- East Hartford 10
- Windham 10
- Woodbury 10
- Mansfield City 9
- Tolland 9
- Clinton 8
- Norwich 8
- Sherman 8
- Southington 8
- Guilford 5
- Winsted 5
- Storrs 4
- West Hartford 4
- Middlebury 3
- Milford 3
- Oxford 3
- Somers 2
- Enfield 0
- Hebron 0
AQI US, Metric