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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 | Clinton | 65 |
| 2 | Waterbury | 56 |
| 3 | Ledyard | 50 |
| 4 | Mansfield City | 50 |
| 5 | Old Lyme | 42 |
| 6 | Oxford | 37 |
| 7 | East Hartford | 33 |
| 8 | Pomfret Center | 32 |
| 9 | Danbury | 31 |
| 10 | Windham | 31 |
(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 | Guilford | 5 |
| 2 | Enfield | 8 |
| 3 | Hebron | 8 |
| 4 | Somers | 10 |
| 5 | Greenwich | 11 |
| 6 | Winsted | 11 |
| 7 | Middlebury | 12 |
| 8 | Sherman | 12 |
| 9 | Westport | 12 |
| 10 | West Cornwall | 13 |
(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
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?
- Clinton 65
- Waterbury 56
- Ledyard 50
- Mansfield City 50
- Old Lyme 42
- Oxford 37
- Byram 33
- East Hartford 33
- Glenville 33
- Pemberwick 33
- Bethel 32
- Cos Cob 32
- Georgetown 32
- New Canaan 32
- Pomfret Center 32
- Riverside 32
- Wilton 32
- Danbury 31
- Darien 31
- Easton 31
- New Fairfield 31
- Windham 31
- East Norwalk 30
- Heritage Village 30
- Norwalk 30
- Southbury 30
- Glastonbury 29
- Middletown 29
- New Milford 29
- Shelton 29
- Woodbury 29
- Ansonia 28
- Seymour 28
- Southport 28
- Woodbury Center 28
- Derby 27
- Naugatuck 27
- Bethlehem Village 26
- Oakville 26
- Prospect 26
- Washington 26
- Watertown 26
- Cheshire 25
- Cheshire Village 25
- New London 25
- Redding 25
- Ridgefield 25
- Thomaston 25
- Trumbull 25
- Wolcott 25
- Woodbridge 25
- Bristol 24
- City of Milford (balance) 24
- Groton 24
- New Preston 24
- Orange 24
- Plymouth 24
- Stratford 24
- Terryville 24
- Waterford 24
- Fairfield 23
- Hartford 23
- Litchfield 23
- Meriden 23
- New Haven 23
- Northwest Harwinton 23
- Norwich 23
- Plainville 23
- Woodmont 23
- Bridgeport 22
- Collinsville 22
- Farmington 22
- Kent 22
- North Haven 22
- Old Greenwich 22
- Torrington 22
- Wallingford 22
- Wallingford Center 22
- West Haven 22
- Canton Valley 21
- Kensington 21
- Montville Center 21
- New Britain 21
- New Hartford Center 21
- Newington 21
- Newtown 21
- North Stamford 21
- Simsbury Center 20
- Weatogue 20
- West Simsbury 20
- Blue Hills 19
- Branford Center 19
- Cromwell 19
- Durham 19
- Glastonbury Center 19
- Madison 19
- North Branford 19
- Portland 19
- South Windsor 19
- Tariffville 19
- Tolland 19
- West Hartford 19
- Wethersfield 19
- Winchester Center 19
- Windsor 19
- Coventry Lake 18
- Crystal Lake 18
- East Hampton 18
- East Windsor 18
- Ellington 18
- Guilford Center 18
- Hazardville 18
- Higganum 18
- Lake Pocotopaug 18
- Manchester 18
- North Granby 18
- North Grosvenor Dale 18
- Rockville 18
- Salmon Brook 18
- South Coventry 18
- Southwood Acres 18
- Stafford 18
- Stafford Springs 18
- Stamford 18
- Storrs 18
- Terramuggus 18
- Thompson 18
- Windsor Locks 18
- Canaan 17
- Colchester 17
- East Haddam 17
- Hamden 17
- Killingly Center 17
- Madison Center 17
- Moodus 17
- Putnam 17
- Quinebaug 17
- Sherwood Manor 17
- South Windham 17
- South Woodstock 17
- Suffield Depot 17
- Thompsonville 17
- Willimantic 17
- Baltic 16
- Chester Center 16
- Danielson 16
- Deep River Center 16
- East Brooklyn 16
- East Haven 16
- Essex Village 16
- Moosup 16
- Plainfield 16
- Plainfield Village 16
- Salem 16
- Southington 16
- Wauregan 16
- Jewett City 15
- Lisbon 15
- Milford 15
- Old Saybrook 15
- Old Saybrook Center 15
- Saybrook Manor 15
- Westbrook Center 15
- Branford 14
- Niantic 14
- Oxoboxo River 14
- Preston City 14
- Uncasville 14
- Gales Ferry 13
- West Cornwall 13
- West Torrington 13
- Central Waterford 12
- Conning Towers-Nautilus Park 12
- Long Hill 12
- Middlebury 12
- Old Mystic 12
- Sherman 12
- Westport 12
- Greenwich 11
- Mystic 11
- Noank 11
- Pawcatuck 11
- Poquonock Bridge 11
- Winsted 11
- Somers 10
- Enfield 8
- Hebron 8
- Guilford 5
AQI US, Metric