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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 | 40 |
| 2 | Groton | 34 |
| 3 | New Haven | 32 |
| 4 | West Cornwall | 31 |
| 5 | West Torrington | 31 |
| 6 | Pomfret Center | 28 |
| 7 | Stafford | 28 |
| 8 | North Stamford | 26 |
| 9 | Ridgefield | 26 |
| 10 | Danbury | 25 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
70 Contributors
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LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Guilford | 3 |
| 2 | Somers | 5 |
| 3 | Middlebury | 7 |
| 4 | Milford | 7 |
| 5 | Enfield | 9 |
| 6 | West Hartford | 9 |
| 7 | Westport | 9 |
| 8 | Branford | 10 |
| 9 | Norwich | 10 |
| 10 | Clinton | 12 |
(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
70Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
64 Anonymous contributors64 stations
64 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Wauregan 40
- Groton 34
- Canaan 33
- New Haven 32
- Kent 31
- West Cornwall 31
- West Torrington 31
- Winchester Center 31
- New Preston 30
- Stratford 30
- New Milford 29
- Torrington 29
- Litchfield 28
- New Hartford Center 28
- North Granby 28
- Pomfret Center 28
- Stafford 28
- Washington 28
- New Fairfield 27
- Salmon Brook 27
- Bethel 26
- Bethlehem Village 26
- North Stamford 26
- Northwest Harwinton 26
- Ridgefield 26
- West Simsbury 26
- Canton Valley 25
- Collinsville 25
- Danbury 25
- Fairfield 25
- Heritage Village 25
- Plymouth 25
- Sherwood Manor 25
- Simsbury Center 25
- Thomaston 25
- Waterford 25
- Woodbury Center 25
- Georgetown 24
- Oakville 24
- Southbury 24
- Suffield Depot 24
- Tariffville 24
- Terryville 24
- Thompsonville 24
- Watertown 24
- Weatogue 24
- Hartford 23
- Waterbury 23
- Woodbury 23
- Bristol 22
- Easton 22
- Hazardville 22
- Southwood Acres 22
- Wilton 22
- Windsor Locks 22
- East Windsor 21
- Greenwich 21
- New Canaan 21
- Newtown 21
- Stafford Springs 21
- Stamford 21
- Wolcott 21
- Woodbridge 21
- Blue Hills 20
- Cos Cob 20
- Crystal Lake 20
- Farmington 20
- Glenville 20
- Naugatuck 20
- New London 20
- Pemberwick 20
- Plainville 20
- Seymour 20
- Trumbull 20
- Windham 20
- Windsor 20
- Ansonia 19
- Byram 19
- Darien 19
- Derby 19
- East Hartford 19
- Ellington 19
- New Britain 19
- Newington 19
- Norwalk 19
- Prospect 19
- Quinebaug 19
- Redding 19
- Riverside 19
- Rockville 19
- South Windsor 19
- Cheshire 18
- Cheshire Village 18
- East Norwalk 18
- Kensington 18
- Manchester 18
- Meriden 18
- Old Greenwich 18
- Orange 18
- Southport 18
- Wethersfield 18
- City of Milford (balance) 17
- East Haven 17
- Glastonbury Center 17
- North Grosvenor Dale 17
- South Woodstock 17
- Thompson 17
- Wallingford 17
- Winsted 17
- Bridgeport 16
- Cromwell 16
- Glastonbury 16
- Madison 16
- Mansfield City 16
- North Haven 16
- Portland 16
- Putnam 16
- Wallingford Center 16
- West Haven 16
- Woodmont 16
- Central Waterford 15
- Colchester 15
- Coventry Lake 15
- Danielson 15
- Durham 15
- East Brooklyn 15
- East Haddam 15
- East Hampton 15
- Higganum 15
- Killingly Center 15
- Lake Pocotopaug 15
- Middletown 15
- Moodus 15
- Moosup 15
- Mystic 15
- Niantic 15
- Noank 15
- Old Mystic 15
- Pawcatuck 15
- Plainfield 15
- Plainfield Village 15
- Poquonock Bridge 15
- Salem 15
- Shelton 15
- South Coventry 15
- South Windham 15
- Storrs 15
- Terramuggus 15
- Tolland 15
- Willimantic 15
- Baltic 14
- Branford Center 14
- Chester Center 14
- Conning Towers-Nautilus Park 14
- Deep River Center 14
- Essex Village 14
- Gales Ferry 14
- Guilford Center 14
- Jewett City 14
- Lisbon 14
- Long Hill 14
- Madison Center 14
- North Branford 14
- Old Saybrook 14
- Old Saybrook Center 14
- Oxoboxo River 14
- Preston City 14
- Saybrook Manor 14
- Sherman 14
- Uncasville 14
- Westbrook Center 14
- Hamden 13
- Old Lyme 13
- Oxford 13
- Southington 13
- Clinton 12
- Ledyard 12
- Montville Center 12
- Branford 10
- Norwich 10
- Enfield 9
- West Hartford 9
- Westport 9
- Middlebury 7
- Milford 7
- Somers 5
- Guilford 3
- Hebron 3
AQI US, Metric