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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 | 38 |
| 2 | Wauregan | 23 |
| 3 | Ledyard | 19 |
| 4 | North Stamford | 19 |
| 5 | Ridgefield | 19 |
| 6 | Danbury | 17 |
| 7 | Hartford | 17 |
| 8 | Montville Center | 17 |
| 9 | Windham | 17 |
| 10 | East Haven | 16 |
(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 | Hebron | 3 |
| 2 | West Hartford | 6 |
| 3 | Enfield | 7 |
| 4 | Guilford | 7 |
| 5 | Middlebury | 8 |
| 6 | Milford | 9 |
| 7 | Oxford | 9 |
| 8 | Redding | 9 |
| 9 | Stamford | 9 |
| 10 | Greenwich | 10 |
(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 38
- Stratford 34
- Wauregan 23
- Ledyard 19
- Madison 19
- North Stamford 19
- Ridgefield 19
- Glenville 18
- Byram 17
- Cos Cob 17
- Danbury 17
- Hartford 17
- Montville Center 17
- Pemberwick 17
- Windham 17
- Canaan 16
- East Haven 16
- Glastonbury 16
- Groton 16
- Kent 16
- Mansfield City 16
- New Fairfield 16
- Old Greenwich 16
- Riverside 16
- Stafford 16
- Tolland 16
- Waterbury 16
- Bethel 15
- Bethlehem Village 15
- Darien 15
- East Hartford 15
- East Norwalk 15
- Georgetown 15
- Heritage Village 15
- Litchfield 15
- New Canaan 15
- New Haven 15
- New London 15
- New Milford 15
- New Preston 15
- Newtown 15
- Northwest Harwinton 15
- Norwalk 15
- Southbury 15
- Southington 15
- Torrington 15
- Trumbull 15
- Washington 15
- West Cornwall 15
- West Torrington 15
- Wilton 15
- Winchester Center 15
- Woodbridge 15
- Woodbury Center 15
- Ansonia 14
- Bridgeport 14
- Bristol 14
- Canton Valley 14
- Cheshire 14
- Cheshire Village 14
- Collinsville 14
- Derby 14
- Easton 14
- Hamden 14
- Naugatuck 14
- New Hartford Center 14
- Oakville 14
- Plymouth 14
- Prospect 14
- Seymour 14
- Southport 14
- Terryville 14
- Thomaston 14
- Watertown 14
- Wolcott 14
- Woodbury 14
- Blue Hills 13
- City of Milford (balance) 13
- East Windsor 13
- Fairfield 13
- Farmington 13
- Hazardville 13
- Kensington 13
- Meriden 13
- Middletown 13
- New Britain 13
- Newington 13
- North Granby 13
- Norwich 13
- Old Lyme 13
- Orange 13
- Plainville 13
- Salmon Brook 13
- Sherwood Manor 13
- Simsbury Center 13
- Southwood Acres 13
- Suffield Depot 13
- Tariffville 13
- Thompsonville 13
- Wallingford 13
- Weatogue 13
- West Simsbury 13
- Windsor 13
- Windsor Locks 13
- Central Waterford 12
- Chester Center 12
- Cromwell 12
- Crystal Lake 12
- Deep River Center 12
- Durham 12
- East Haddam 12
- East Hampton 12
- Ellington 12
- Essex Village 12
- Glastonbury Center 12
- Higganum 12
- Lake Pocotopaug 12
- Long Hill 12
- Manchester 12
- Moodus 12
- Niantic 12
- North Grosvenor Dale 12
- North Haven 12
- Old Saybrook 12
- Old Saybrook Center 12
- Oxoboxo River 12
- Portland 12
- Quinebaug 12
- Rockville 12
- Salem 12
- Shelton 12
- South Windsor 12
- Stafford Springs 12
- Storrs 12
- Terramuggus 12
- Thompson 12
- Wallingford Center 12
- Waterford 12
- Wethersfield 12
- Woodmont 12
- Baltic 11
- Branford 11
- Branford Center 11
- Clinton 11
- Colchester 11
- Conning Towers-Nautilus Park 11
- Coventry Lake 11
- Danielson 11
- East Brooklyn 11
- Gales Ferry 11
- Guilford Center 11
- Jewett City 11
- Killingly Center 11
- Lisbon 11
- Madison Center 11
- Moosup 11
- Mystic 11
- Noank 11
- North Branford 11
- Old Mystic 11
- Pawcatuck 11
- Plainfield 11
- Plainfield Village 11
- Poquonock Bridge 11
- Preston City 11
- Putnam 11
- Saybrook Manor 11
- Sherman 11
- South Coventry 11
- South Windham 11
- South Woodstock 11
- Uncasville 11
- West Haven 11
- Westbrook Center 11
- Willimantic 11
- Greenwich 10
- Somers 10
- Westport 10
- Winsted 10
- Milford 9
- Oxford 9
- Redding 9
- Stamford 9
- Middlebury 8
- Enfield 7
- Guilford 7
- West Hartford 6
- Hebron 3
AQI US, Metric