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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 |  Stafford | 27 |
| 2 | Waterford | 26 |
| 3 | Wauregan | 24 |
| 4 | Groton | 23 |
| 5 | New London | 22 |
| 6 | North Stamford | 21 |
| 7 | Norwich | 21 |
| 8 | Ridgefield | 21 |
| 9 | East Hartford | 20 |
| 10 | Montville Center | 20 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
68 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Greenwich | 5 |
| 2 | Milford | 6 |
| 3 | Redding | 7 |
| 4 | Middlebury | 8 |
| 5 | Oxford | 8 |
| 6 | Hebron | 9 |
| 7 | Guilford | 10 |
| 8 | Sherman | 10 |
| 9 | West Hartford | 11 |
| 10 | Westport | 11 |
(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
68Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
62 Anonymous contributors62 stations
62 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Stratford 28
- Stafford 27
- Waterford 26
- Wauregan 24
- Groton 23
- Pomfret Center 23
- New London 22
- North Stamford 21
- Norwich 21
- Ridgefield 21
- East Hartford 20
- Montville Center 20
- Windham 20
- Glastonbury 19
- Woodbridge 19
- East Haven 18
- Hartford 18
- Ledyard 18
- Middletown 18
- Tolland 18
- Waterbury 18
- West Cornwall 18
- West Torrington 18
- Crystal Lake 17
- Danbury 17
- Ellington 17
- Hazardville 17
- Old Greenwich 17
- Quinebaug 17
- Shelton 17
- Sherwood Manor 17
- Southington 17
- Stafford Springs 17
- Storrs 17
- Thompsonville 17
- Coventry Lake 16
- East Windsor 16
- Mansfield City 16
- North Granby 16
- North Grosvenor Dale 16
- Putnam 16
- Rockville 16
- Salmon Brook 16
- South Coventry 16
- South Woodstock 16
- Southwood Acres 16
- Suffield Depot 16
- Tariffville 16
- Thompson 16
- Windsor 16
- Windsor Locks 16
- Bethel 15
- Blue Hills 15
- Bridgeport 15
- Byram 15
- Canton Valley 15
- Cos Cob 15
- Darien 15
- East Norwalk 15
- Easton 15
- Georgetown 15
- Glenville 15
- Heritage Village 15
- Kent 15
- Killingly Center 15
- Manchester 15
- New Canaan 15
- New Fairfield 15
- New Haven 15
- New Milford 15
- Norwalk 15
- Pemberwick 15
- Riverside 15
- Simsbury Center 15
- South Windsor 15
- Southbury 15
- Southport 15
- Trumbull 15
- Weatogue 15
- West Simsbury 15
- Wilton 15
- Woodbury 15
- Ansonia 14
- Bethlehem Village 14
- Bristol 14
- Cheshire 14
- Cheshire Village 14
- City of Milford (balance) 14
- Clinton 14
- Collinsville 14
- Danielson 14
- Derby 14
- East Brooklyn 14
- Farmington 14
- Glastonbury Center 14
- Kensington 14
- Madison 14
- Naugatuck 14
- New Britain 14
- New Hartford Center 14
- New Preston 14
- Newington 14
- Northwest Harwinton 14
- Oakville 14
- Orange 14
- Plainville 14
- Plymouth 14
- Prospect 14
- Seymour 14
- Terramuggus 14
- Terryville 14
- Thomaston 14
- Washington 14
- Watertown 14
- Wethersfield 14
- Willimantic 14
- Wolcott 14
- Woodbury Center 14
- Branford 13
- Canaan 13
- Cromwell 13
- Fairfield 13
- Hamden 13
- Lake Pocotopaug 13
- Litchfield 13
- Meriden 13
- Moosup 13
- North Haven 13
- Portland 13
- Somers 13
- South Windham 13
- Torrington 13
- Wallingford 13
- Wallingford Center 13
- West Haven 13
- Winchester Center 13
- Winsted 13
- Woodmont 13
- Branford Center 12
- Colchester 12
- Durham 12
- East Haddam 12
- East Hampton 12
- Enfield 12
- Guilford Center 12
- Higganum 12
- Moodus 12
- Newtown 12
- North Branford 12
- Plainfield 12
- Plainfield Village 12
- Stamford 12
- Baltic 11
- Chester Center 11
- Deep River Center 11
- Jewett City 11
- Lisbon 11
- Madison Center 11
- Salem 11
- West Hartford 11
- Westport 11
- Essex Village 10
- Guilford 10
- Niantic 10
- Old Saybrook 10
- Old Saybrook Center 10
- Oxoboxo River 10
- Preston City 10
- Saybrook Manor 10
- Sherman 10
- Uncasville 10
- Westbrook Center 10
- Central Waterford 9
- Conning Towers-Nautilus Park 9
- Gales Ferry 9
- Hebron 9
- Long Hill 9
- Mystic 9
- Noank 9
- Old Mystic 9
- Pawcatuck 9
- Poquonock Bridge 9
- Middlebury 8
- Oxford 8
- Redding 7
- Milford 6
- Greenwich 5
AQI US, Metric