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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 |  Wauregan | 62 |
| 2 | Waterford | 24 |
| 3 | Pomfret Center | 23 |
| 4 | Ridgefield | 23 |
| 5 | Woodbridge | 21 |
| 6 | West Cornwall | 20 |
| 7 | West Torrington | 19 |
| 8 | Danbury | 17 |
| 9 | Waterbury | 15 |
| 10 | East Haven | 14 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
67 Contributors
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3D animated air pollution map
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The latest air quality news and resources.
Connecticut air quality data attribution
67Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
61 Anonymous contributors61 stations
61 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Wauregan 62
- Waterford 24
- Pomfret Center 23
- Ridgefield 23
- Byram 21
- Glenville 21
- New Fairfield 21
- Pemberwick 21
- Woodbridge 21
- Bethel 20
- Cos Cob 20
- Kent 20
- New Canaan 20
- New Milford 20
- Old Greenwich 20
- Riverside 20
- West Cornwall 20
- Darien 19
- Georgetown 19
- New Preston 19
- Washington 19
- West Torrington 19
- Wilton 19
- Bethlehem Village 18
- Canaan 18
- East Norwalk 18
- Easton 18
- Heritage Village 18
- Litchfield 18
- Naugatuck 18
- Northwest Harwinton 18
- Norwalk 18
- Oakville 18
- Plymouth 18
- Seymour 18
- Southbury 18
- Southport 18
- Terryville 18
- Thomaston 18
- Torrington 18
- Watertown 18
- Winchester Center 18
- Woodbury Center 18
- Ansonia 17
- Bristol 17
- Danbury 17
- Derby 17
- Prospect 17
- Wolcott 17
- Cheshire 16
- Cheshire Village 16
- City of Milford (balance) 16
- Collinsville 16
- New Hartford Center 16
- Orange 16
- Plainville 16
- Stratford 16
- West Haven 16
- Woodmont 16
- Canton Valley 15
- Farmington 15
- Kensington 15
- Meriden 15
- New Britain 15
- Newington 15
- North Haven 15
- Wallingford 15
- Wallingford Center 15
- Waterbury 15
- Branford Center 14
- Durham 14
- East Haven 14
- Middletown 14
- North Branford 14
- Old Lyme 14
- Simsbury Center 14
- Weatogue 14
- West Simsbury 14
- Blue Hills 13
- Cromwell 13
- Glastonbury Center 13
- Greenwich 13
- Guilford Center 13
- Higganum 13
- Lake Pocotopaug 13
- Madison 13
- Madison Center 13
- North Granby 13
- Portland 13
- Salmon Brook 13
- South Windsor 13
- Tariffville 13
- Wethersfield 13
- Windsor 13
- Baltic 12
- Chester Center 12
- Colchester 12
- Coventry Lake 12
- Crystal Lake 12
- Deep River Center 12
- East Haddam 12
- East Hampton 12
- East Windsor 12
- Ellington 12
- Essex Village 12
- Hazardville 12
- Manchester 12
- Moodus 12
- Old Saybrook 12
- Old Saybrook Center 12
- Rockville 12
- Salem 12
- Saybrook Manor 12
- Sherman 12
- Sherwood Manor 12
- South Coventry 12
- South Windham 12
- Southwood Acres 12
- Stamford 12
- Suffield Depot 12
- Terramuggus 12
- Thompsonville 12
- Trumbull 12
- Westbrook Center 12
- Willimantic 12
- Windsor Locks 12
- Central Waterford 11
- Danielson 11
- East Brooklyn 11
- Gales Ferry 11
- Hartford 11
- Jewett City 11
- Killingly Center 11
- Lisbon 11
- Moosup 11
- New Haven 11
- Newtown 11
- Niantic 11
- North Grosvenor Dale 11
- North Stamford 11
- Oxoboxo River 11
- Plainfield 11
- Plainfield Village 11
- Preston City 11
- Putnam 11
- Quinebaug 11
- South Woodstock 11
- Stafford Springs 11
- Thompson 11
- Uncasville 11
- Woodbury 11
- Conning Towers-Nautilus Park 10
- Long Hill 10
- Mystic 10
- Noank 10
- Old Mystic 10
- Poquonock Bridge 10
- Redding 10
- Hamden 9
- Pawcatuck 9
- Southington 9
- Bridgeport 8
- Fairfield 8
- Shelton 8
- Westport 8
- Winsted 8
- Glastonbury 7
- Hebron 7
- New London 7
- Branford 6
- East Hartford 6
- Groton 6
- Oxford 6
- Enfield 5
- Stafford 5
- West Hartford 5
- Ledyard 4
- Middlebury 4
- Montville Center 4
- Norwich 3
- Storrs 3
- Windham 3
- Mansfield City 2
- Somers 2
- Tolland 2
- Clinton 1
- Guilford 1
- Milford 0
AQI US, Metric