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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 |  New Haven | 29 |
| 2 | Pomfret Center | 29 |
| 3 | East Hartford | 26 |
| 4 | Ridgefield | 24 |
| 5 | Waterford | 24 |
| 6 | Middletown | 20 |
| 7 | Danbury | 17 |
| 8 | Hartford | 12 |
| 9 | Wauregan | 11 |
| 10 | West Cornwall | 9 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
64 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Ledyard | 0 |
| 2 | Montville Center | 0 |
| 3 | North Stamford | 0 |
| 4 | Redding | 0 |
| 5 | Woodbury | 0 |
| 6 | Hamden | 1 |
| 7 | Old Lyme | 1 |
| 8 | Sherman | 1 |
| 9 | Storrs | 1 |
| 10 | Enfield | 2 |
(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
64Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
58 Anonymous contributors58 stations
58 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Stratford 30
- New Haven 29
- Pomfret Center 29
- East Hartford 26
- Ridgefield 24
- Waterford 24
- Middletown 20
- Hebron 18
- Danbury 17
- Madison 16
- Canaan 13
- Baltic 12
- Blue Hills 12
- Canton Valley 12
- Collinsville 12
- Conning Towers-Nautilus Park 12
- Coventry Lake 12
- Crystal Lake 12
- Danielson 12
- East Brooklyn 12
- East Windsor 12
- Ellington 12
- Gales Ferry 12
- Glastonbury Center 12
- Hartford 12
- Hazardville 12
- Jewett City 12
- Kent 12
- Killingly Center 12
- Lisbon 12
- Litchfield 12
- Long Hill 12
- Manchester 12
- Moosup 12
- Mystic 12
- New Hartford Center 12
- New Preston 12
- Noank 12
- North Granby 12
- North Grosvenor Dale 12
- Northwest Harwinton 12
- Old Mystic 12
- Oxoboxo River 12
- Pawcatuck 12
- Plainfield 12
- Plainfield Village 12
- Poquonock Bridge 12
- Preston City 12
- Putnam 12
- Quinebaug 12
- Rockville 12
- Salmon Brook 12
- Sherwood Manor 12
- Simsbury Center 12
- South Coventry 12
- South Windham 12
- South Windsor 12
- South Woodstock 12
- Southwood Acres 12
- Stafford Springs 12
- Suffield Depot 12
- Tariffville 12
- Terramuggus 12
- Thompson 12
- Thompsonville 12
- Torrington 12
- Uncasville 12
- Weatogue 12
- West Simsbury 12
- Wethersfield 12
- Willimantic 12
- Winchester Center 12
- Windsor 12
- Windsor Locks 12
- Bethlehem Village 11
- Bristol 11
- Central Waterford 11
- Colchester 11
- Cromwell 11
- East Hampton 11
- Farmington 11
- Kensington 11
- Lake Pocotopaug 11
- New Britain 11
- New Fairfield 11
- New Milford 11
- Newington 11
- Plainville 11
- Plymouth 11
- Portland 11
- Salem 11
- Terryville 11
- Thomaston 11
- Washington 11
- Wauregan 11
- Ansonia 10
- Bethel 10
- Byram 10
- Cheshire 10
- Cheshire Village 10
- Chester Center 10
- Cos Cob 10
- Darien 10
- Deep River Center 10
- Derby 10
- Durham 10
- East Haddam 10
- East Norwalk 10
- Easton 10
- Essex Village 10
- Georgetown 10
- Glenville 10
- Guilford Center 10
- Heritage Village 10
- Higganum 10
- Madison Center 10
- Meriden 10
- Moodus 10
- Naugatuck 10
- New Canaan 10
- Niantic 10
- North Branford 10
- North Haven 10
- Norwalk 10
- Oakville 10
- Old Saybrook 10
- Old Saybrook Center 10
- Orange 10
- Pemberwick 10
- Prospect 10
- Riverside 10
- Saybrook Manor 10
- Seymour 10
- Southbury 10
- Wallingford 10
- Wallingford Center 10
- Watertown 10
- Westbrook Center 10
- Wilton 10
- Wolcott 10
- Woodbury Center 10
- Branford Center 9
- City of Milford (balance) 9
- Southport 9
- West Cornwall 9
- West Haven 9
- West Torrington 9
- Woodmont 9
- Bridgeport 7
- Trumbull 7
- Woodbridge 7
- Old Greenwich 6
- Fairfield 5
- Stafford 5
- Stamford 5
- Waterbury 5
- East Haven 4
- New London 4
- Newtown 4
- Somers 4
- Branford 3
- Greenwich 3
- Groton 3
- Milford 3
- Shelton 3
- Southington 3
- Westport 3
- Windham 3
- Winsted 3
- Clinton 2
- Enfield 2
- Glastonbury 2
- Mansfield City 2
- Middlebury 2
- Norwich 2
- Oxford 2
- Tolland 2
- West Hartford 2
- Hamden 1
- Old Lyme 1
- Sherman 1
- Storrs 1
- Guilford 0
- Ledyard 0
- Montville Center 0
- North Stamford 0
- Redding 0
- Woodbury 0
AQI US, Metric