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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 | 32 |
| 2 | Pomfret Center | 31 |
| 3 | Old Greenwich | 28 |
| 4 | Bridgeport | 23 |
| 5 | Stamford | 21 |
| 6 | Stafford | 19 |
| 7 | Trumbull | 19 |
| 8 | New London | 17 |
| 9 | East Haven | 16 |
| 10 | Greenwich | 16 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
71 Contributors
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LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Guilford | 1 |
| 2 | Middlebury | 1 |
| 3 | Clinton | 2 |
| 4 | Milford | 3 |
| 5 | Somers | 4 |
| 6 | Southington | 5 |
| 7 | Branford | 6 |
| 8 | Enfield | 6 |
| 9 | Hamden | 6 |
| 10 | Oxford | 6 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Moderate
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?
- Canaan 45
- North Granby 45
- Sherwood Manor 45
- Thompsonville 45
- Winchester Center 45
- East Windsor 44
- Hazardville 44
- New Hartford Center 44
- Salmon Brook 44
- Southwood Acres 44
- Stafford Springs 44
- Suffield Depot 44
- Windsor Locks 44
- Blue Hills 43
- Canton Valley 43
- Collinsville 43
- Crystal Lake 43
- Ellington 43
- Kent 43
- Simsbury Center 43
- South Windsor 43
- Tariffville 43
- Torrington 43
- Weatogue 43
- West Simsbury 43
- Windsor 43
- Farmington 42
- Litchfield 42
- Northwest Harwinton 42
- Rockville 42
- New Preston 41
- Manchester 40
- Newington 39
- Quinebaug 39
- Wethersfield 39
- North Grosvenor Dale 38
- Plymouth 38
- Terryville 38
- Thomaston 38
- Washington 38
- Bristol 37
- Coventry Lake 37
- Plainville 37
- South Woodstock 37
- Thompson 37
- Bethlehem Village 36
- Glastonbury Center 36
- New Milford 36
- Putnam 36
- South Coventry 36
- New Britain 33
- Wauregan 32
- Kensington 31
- New Fairfield 31
- Oakville 31
- Pomfret Center 31
- Watertown 31
- Woodbury Center 31
- Terramuggus 30
- Wolcott 30
- Cheshire 29
- Cheshire Village 29
- Cromwell 29
- East Hampton 29
- Lake Pocotopaug 29
- Meriden 29
- Portland 29
- Prospect 29
- Heritage Village 28
- Killingly Center 28
- Old Greenwich 28
- Southbury 28
- Willimantic 28
- Naugatuck 27
- Colchester 26
- Danielson 26
- East Brooklyn 26
- South Windham 26
- Stratford 26
- Wallingford 26
- Bethel 25
- Durham 25
- Higganum 25
- North Haven 25
- Wallingford Center 25
- Moodus 24
- Seymour 24
- Bridgeport 23
- East Haddam 23
- Baltic 22
- Chester Center 22
- Deep River Center 22
- Moosup 22
- North Branford 22
- Plainfield 22
- Plainfield Village 22
- Salem 22
- Ansonia 21
- Essex Village 21
- Georgetown 21
- Guilford Center 21
- Jewett City 21
- Lisbon 21
- Madison Center 21
- Stamford 21
- Branford Center 20
- Derby 20
- Madison 20
- Old Saybrook 20
- West Haven 20
- Westbrook Center 20
- Easton 19
- Niantic 19
- Old Saybrook Center 19
- Orange 19
- Saybrook Manor 19
- Stafford 19
- Trumbull 19
- Wilton 19
- Byram 18
- Central Waterford 18
- City of Milford (balance) 18
- Gales Ferry 18
- Glenville 18
- Hebron 18
- New Canaan 18
- Oxoboxo River 18
- Pemberwick 18
- Preston City 18
- Uncasville 18
- Woodmont 18
- Conning Towers-Nautilus Park 17
- Cos Cob 17
- Long Hill 17
- New London 17
- Norwalk 17
- Riverside 17
- Darien 16
- East Haven 16
- East Norwalk 16
- Greenwich 16
- Mystic 16
- Noank 16
- North Stamford 16
- Old Mystic 16
- Poquonock Bridge 16
- Ridgefield 16
- Southport 16
- West Cornwall 16
- West Torrington 16
- Fairfield 15
- Pawcatuck 15
- Hartford 14
- Redding 14
- East Hartford 13
- Middletown 13
- Tolland 13
- Westport 13
- Woodbridge 13
- Danbury 12
- Windham 12
- Groton 11
- Waterford 11
- Glastonbury 10
- Shelton 10
- Waterbury 10
- Montville Center 9
- New Haven 9
- Norwich 9
- Winsted 9
- Ledyard 8
- Mansfield City 8
- Old Lyme 8
- Storrs 8
- Newtown 7
- Sherman 7
- Woodbury 7
- Branford 6
- Enfield 6
- Hamden 6
- Oxford 6
- West Hartford 6
- Southington 5
- Somers 4
- Milford 3
- Clinton 2
- Guilford 1
- Middlebury 1
AQI US, Metric