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