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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 | Pomfret Center | 41 |
| 2 | East Hartford | 38 |
| 3 | New Haven | 36 |
| 4 | Wauregan | 28 |
| 5 | Shelton | 27 |
| 6 | New London | 26 |
| 7 | Groton | 25 |
| 8 | Ledyard | 25 |
| 9 | Old Lyme | 24 |
| 10 | East Haven | 23 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
72 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | North Stamford | 4 |
| 2 | Ridgefield | 4 |
| 3 | West Hartford | 10 |
| 4 | Hebron | 11 |
| 5 | Danbury | 12 |
| 6 | Enfield | 13 |
| 7 | Greenwich | 13 |
| 8 | Guilford | 13 |
| 9 | Milford | 13 |
| 10 | Old Greenwich | 13 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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News
The latest air quality news and resources.
Connecticut air quality data attribution
72Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
66 Anonymous contributors66 stations
66 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Pomfret Center 41
- Stratford 41
- East Hartford 38
- New Haven 36
- Pawcatuck 36
- Mystic 35
- Noank 35
- Old Mystic 35
- Poquonock Bridge 35
- Central Waterford 34
- Conning Towers-Nautilus Park 34
- Gales Ferry 34
- Long Hill 34
- Niantic 34
- Oxoboxo River 34
- Preston City 34
- Uncasville 34
- Old Saybrook 33
- Old Saybrook Center 33
- Saybrook Manor 33
- Jewett City 32
- Westbrook Center 32
- Essex Village 31
- Lisbon 31
- Madison 31
- Moosup 31
- Plainfield 31
- Plainfield Village 31
- Baltic 30
- Chester Center 30
- Deep River Center 30
- East Haddam 30
- Guilford Center 30
- Madison Center 30
- Salem 30
- Danielson 29
- Moodus 29
- East Brooklyn 28
- Killingly Center 28
- Wauregan 28
- North Branford 27
- Shelton 27
- South Windham 27
- Colchester 26
- New London 26
- Branford Center 25
- Groton 25
- Higganum 25
- Ledyard 25
- Willimantic 25
- Old Lyme 24
- Thompson 24
- West Haven 24
- Woodmont 24
- City of Milford (balance) 23
- Durham 23
- East Hampton 23
- East Haven 23
- Lake Pocotopaug 23
- North Grosvenor Dale 23
- Putnam 23
- Montville Center 22
- North Haven 22
- Orange 22
- South Woodstock 22
- Terramuggus 22
- Woodbridge 22
- Quinebaug 21
- Wallingford Center 21
- Waterford 21
- Coventry Lake 20
- Cromwell 20
- Darien 20
- East Norwalk 20
- Middletown 20
- Norwalk 20
- Portland 20
- South Coventry 20
- Southington 20
- Southport 20
- Wallingford 20
- Byram 19
- Cos Cob 19
- Derby 19
- Pemberwick 19
- Riverside 19
- Stamford 19
- Ansonia 18
- Glenville 18
- Stafford 18
- Woodbury 18
- Glastonbury 17
- Glastonbury Center 17
- Hamden 17
- Mansfield City 17
- Meriden 17
- New Canaan 17
- Newtown 17
- Tolland 17
- Clinton 16
- Easton 16
- Fairfield 16
- Hartford 16
- Manchester 16
- Middlebury 16
- Seymour 16
- Waterbury 16
- Wilton 16
- Branford 15
- Bridgeport 15
- Cheshire 15
- Cheshire Village 15
- Kensington 15
- Norwich 15
- Oxford 15
- Redding 15
- Sherman 15
- Storrs 15
- Windham 15
- Winsted 15
- Crystal Lake 14
- Ellington 14
- Georgetown 14
- Naugatuck 14
- New Britain 14
- Newington 14
- Prospect 14
- Rockville 14
- South Windsor 14
- Trumbull 14
- Westport 14
- Wethersfield 14
- Blue Hills 13
- East Windsor 13
- Enfield 13
- Farmington 13
- Greenwich 13
- Guilford 13
- Milford 13
- Old Greenwich 13
- Plainville 13
- Somers 13
- Stafford Springs 13
- West Cornwall 13
- West Torrington 13
- Windsor 13
- Wolcott 13
- Bristol 12
- Danbury 12
- Hazardville 12
- Heritage Village 12
- Southbury 12
- Southwood Acres 12
- Windsor Locks 12
- Bethel 11
- Bethlehem Village 11
- Hebron 11
- New Fairfield 11
- Oakville 11
- Plymouth 11
- Sherwood Manor 11
- Suffield Depot 11
- Terryville 11
- Thomaston 11
- Thompsonville 11
- Watertown 11
- Weatogue 11
- Woodbury Center 11
- Canton Valley 10
- Collinsville 10
- Litchfield 10
- New Hartford Center 10
- New Milford 10
- New Preston 10
- Northwest Harwinton 10
- Salmon Brook 10
- Simsbury Center 10
- Tariffville 10
- Torrington 10
- Washington 10
- West Hartford 10
- West Simsbury 10
- Kent 9
- North Granby 9
- Winchester Center 9
- Canaan 8
- North Stamford 4
- Ridgefield 4
AQI US, Metric