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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 |  New London | 29 |
| 2 | Waterford | 29 |
| 3 | Wauregan | 27 |
| 4 | Old Lyme | 26 |
| 5 | East Hartford | 25 |
| 6 | Groton | 25 |
| 7 | Woodbridge | 24 |
| 8 | North Stamford | 21 |
| 9 | Ridgefield | 21 |
| 10 | Storrs | 20 |
(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 | Enfield | 1 |
| 2 | Milford | 1 |
| 3 | Somers | 1 |
| 4 | Guilford | 4 |
| 5 | Winsted | 4 |
| 6 | Middlebury | 5 |
| 7 | Greenwich | 6 |
| 8 | Norwich | 6 |
| 9 | Tolland | 6 |
| 10 | West Hartford | 6 |
(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?
- Pawcatuck 44
- Noank 43
- Mystic 42
- Old Mystic 42
- Poquonock Bridge 41
- Conning Towers-Nautilus Park 40
- Long Hill 40
- Central Waterford 39
- Gales Ferry 39
- Preston City 39
- Uncasville 39
- Jewett City 38
- Niantic 38
- Oxoboxo River 38
- Lisbon 37
- Moosup 37
- Plainfield 37
- Plainfield Village 37
- Danielson 36
- Old Saybrook 36
- Old Saybrook Center 36
- Saybrook Manor 36
- Baltic 35
- East Brooklyn 35
- Essex Village 35
- Killingly Center 35
- Westbrook Center 35
- Deep River Center 34
- Salem 34
- Chester Center 33
- East Haddam 33
- Madison 33
- Thompson 33
- Colchester 32
- Madison Center 32
- Moodus 32
- Pomfret Center 32
- Putnam 32
- South Windham 32
- East Hampton 31
- Guilford Center 31
- Higganum 31
- North Grosvenor Dale 31
- South Woodstock 31
- Willimantic 31
- Branford Center 30
- Durham 30
- Lake Pocotopaug 30
- North Branford 30
- New London 29
- Quinebaug 29
- Terramuggus 29
- Waterford 29
- North Haven 28
- Portland 28
- Stratford 28
- Wallingford 28
- Wallingford Center 28
- Cheshire 27
- Cheshire Village 27
- City of Milford (balance) 27
- Cromwell 27
- Meriden 27
- Orange 27
- South Coventry 27
- Wauregan 27
- West Haven 27
- Woodmont 27
- Ansonia 26
- Coventry Lake 26
- Derby 26
- Glastonbury Center 26
- Kensington 26
- Old Lyme 26
- Prospect 26
- Seymour 26
- East Hartford 25
- Groton 25
- Naugatuck 25
- New Britain 25
- Wethersfield 25
- Bethel 24
- Bristol 24
- Easton 24
- Georgetown 24
- Heritage Village 24
- Manchester 24
- Newington 24
- Oakville 24
- Plainville 24
- Rockville 24
- Southbury 24
- Southport 24
- Watertown 24
- Wolcott 24
- Woodbridge 24
- Woodbury Center 24
- Bethlehem Village 23
- Crystal Lake 23
- Darien 23
- East Norwalk 23
- Ellington 23
- Farmington 23
- New Canaan 23
- New Fairfield 23
- New Milford 23
- Norwalk 23
- Plymouth 23
- Riverside 23
- South Windsor 23
- Terryville 23
- Thomaston 23
- Washington 23
- Wilton 23
- Blue Hills 22
- Byram 22
- Cos Cob 22
- East Windsor 22
- Glenville 22
- New Preston 22
- Pemberwick 22
- Stafford Springs 22
- Windsor 22
- Hazardville 21
- Kent 21
- Litchfield 21
- North Stamford 21
- Northwest Harwinton 21
- Ridgefield 21
- Southwood Acres 21
- Weatogue 21
- Windsor Locks 21
- Canton Valley 20
- Collinsville 20
- Sherwood Manor 20
- Simsbury Center 20
- Storrs 20
- Suffield Depot 20
- Tariffville 20
- Thompsonville 20
- Torrington 20
- West Simsbury 20
- East Haven 19
- New Hartford Center 19
- Salmon Brook 19
- Waterbury 19
- North Granby 18
- Winchester Center 18
- Canaan 16
- Danbury 16
- Bridgeport 15
- Ledyard 15
- Stamford 15
- Branford 14
- Hebron 14
- New Haven 14
- Clinton 13
- Hamden 13
- Trumbull 13
- Middletown 11
- Montville Center 11
- Southington 11
- Fairfield 10
- Glastonbury 10
- Newtown 10
- Hartford 9
- Old Greenwich 9
- Shelton 9
- Sherman 9
- Westport 9
- Mansfield City 8
- Oxford 8
- Stafford 8
- Redding 7
- West Cornwall 7
- West Torrington 7
- Windham 7
- Greenwich 6
- Norwich 6
- Tolland 6
- West Hartford 6
- Woodbury 6
- Middlebury 5
- Guilford 4
- Winsted 4
- Enfield 1
- Milford 1
- Somers 1
AQI US, Metric