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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 |  Woodbridge | 55 |
| 2 | East Haven | 44 |
| 3 | Bridgeport | 43 |
| 4 | Waterbury | 43 |
| 5 | Danbury | 40 |
| 6 | Fairfield | 38 |
| 7 | Old Greenwich | 36 |
| 8 | Trumbull | 36 |
| 9 | Pomfret Center | 35 |
| 10 | Shelton | 33 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
71 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Hebron | 7 |
| 2 | Waterford | 11 |
| 3 | West Hartford | 11 |
| 4 | Guilford | 13 |
| 5 | Somers | 13 |
| 6 | Enfield | 15 |
| 7 | Norwich | 17 |
| 8 | Tolland | 17 |
| 9 | East Hartford | 18 |
| 10 | Mansfield City | 18 |
(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
71Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
65 Anonymous contributors65 stations
65 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Woodbridge 55
- Byram 54
- Glenville 54
- Pemberwick 54
- Cos Cob 53
- Riverside 53
- New Canaan 52
- New Fairfield 51
- Darien 50
- Wilton 50
- Bethel 49
- Georgetown 49
- Kent 49
- East Norwalk 48
- New Milford 48
- Norwalk 48
- New Preston 46
- Easton 45
- Washington 45
- East Haven 44
- Heritage Village 44
- Bridgeport 43
- Canaan 43
- Southbury 43
- Southport 43
- Waterbury 43
- Woodbury Center 43
- Bethlehem Village 42
- Litchfield 42
- Danbury 40
- Torrington 40
- Winchester Center 40
- Watertown 39
- Fairfield 38
- Northwest Harwinton 38
- Oakville 38
- Thomaston 38
- Plymouth 37
- Seymour 37
- Ansonia 36
- Derby 36
- Naugatuck 36
- Old Greenwich 36
- Terryville 36
- Trumbull 36
- New Hartford Center 35
- Pomfret Center 35
- Stratford 35
- Wolcott 35
- City of Milford (balance) 34
- Prospect 34
- Bristol 33
- Orange 33
- Shelton 33
- Collinsville 32
- Hamden 32
- Wauregan 32
- Woodmont 32
- Canton Valley 31
- Cheshire 31
- Cheshire Village 31
- Milford 31
- New Haven 31
- Ridgefield 31
- Middlebury 30
- Newtown 30
- Plainville 30
- Stamford 30
- West Haven 30
- West Simsbury 30
- Farmington 29
- Greenwich 29
- North Stamford 29
- Sherman 29
- Woodbury 29
- Meriden 28
- New Britain 28
- North Granby 28
- North Haven 28
- Oxford 28
- Redding 28
- Salmon Brook 28
- Simsbury Center 28
- Weatogue 28
- Blue Hills 27
- Kensington 27
- Newington 27
- Tariffville 27
- Wallingford 27
- Wallingford Center 27
- West Cornwall 27
- West Torrington 27
- Branford Center 26
- Clinton 26
- Colchester 26
- Coventry Lake 26
- Cromwell 26
- Crystal Lake 26
- Durham 26
- East Hampton 26
- East Windsor 26
- Ellington 26
- Glastonbury Center 26
- Guilford Center 26
- Hazardville 26
- Higganum 26
- Lake Pocotopaug 26
- Manchester 26
- Moodus 26
- North Branford 26
- Portland 26
- Quinebaug 26
- Rockville 26
- Sherwood Manor 26
- South Coventry 26
- South Windsor 26
- Southwood Acres 26
- Stafford Springs 26
- Suffield Depot 26
- Terramuggus 26
- Thompsonville 26
- Wethersfield 26
- Windsor 26
- Windsor Locks 26
- Baltic 25
- Branford 25
- Chester Center 25
- Danielson 25
- East Brooklyn 25
- East Haddam 25
- Glastonbury 25
- Groton 25
- Killingly Center 25
- Madison Center 25
- Moosup 25
- North Grosvenor Dale 25
- Plainfield 25
- Plainfield Village 25
- Putnam 25
- South Windham 25
- South Woodstock 25
- Thompson 25
- Willimantic 25
- Deep River Center 24
- Jewett City 24
- Lisbon 24
- Madison 24
- Salem 24
- Stafford 24
- Westport 24
- Essex Village 23
- New London 23
- Preston City 23
- Storrs 23
- Ledyard 22
- Montville Center 22
- Westbrook Center 22
- Hartford 21
- Old Saybrook 21
- Old Saybrook Center 21
- Oxoboxo River 21
- Saybrook Manor 21
- Uncasville 21
- Central Waterford 20
- Conning Towers-Nautilus Park 20
- Gales Ferry 20
- Long Hill 20
- Mystic 20
- Niantic 20
- Noank 20
- Old Mystic 20
- Pawcatuck 20
- Poquonock Bridge 20
- Southington 19
- East Hartford 18
- Mansfield City 18
- Middletown 18
- Windham 18
- Winsted 18
- Norwich 17
- Tolland 17
- Enfield 15
- Old Lyme 14
- Guilford 13
- Somers 13
- Waterford 11
- West Hartford 11
- Hebron 7
AQI US, Metric