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 | Westport | 20 |
| 2 | East Hartford | 17 |
| 3 | Danbury | 16 |
| 4 | Bridgeport | 15 |
| 5 | Waterbury | 15 |
| 6 | Middletown | 14 |
| 7 | New Haven | 14 |
| 8 | West Cornwall | 14 |
| 9 | Groton | 13 |
| 10 | Hartford | 13 |
(local time)
SEE WORLD AQI RANKINGAir Quality Data contributor(s)
Station(s) operated by
Contributors
See all
35
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Enfield | 0 |
| 2 | Guilford | 0 |
| 3 | Stamford | 1 |
| 4 | Sherman | 3 |
| 5 | Middlebury | 4 |
| 6 | Waterford | 4 |
| 7 | Hamden | 6 |
| 8 | Somers | 6 |
| 9 | Winsted | 6 |
| 10 | Guilford Center | 7 |
(local time)
SEE WORLD AQI RANKING3D animated air pollution map
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
How to best protect from air pollution?
Connecticut air quality data attribution
Contributors 35
- 35 Anonymous contributors
35 stations
Anonymous
Which is the most polluted city in Connecticut?
- Westport20
- Ansonia17
- Bethel17
- Bethlehem Village17
- Blue Hills17
- Bristol17
- Byram17
- Canton Valley17
- Cheshire17
- Cheshire Village17
- Collinsville17
- Cos Cob17
- Cromwell17
- Derby17
- Durham17
- East Hampton17
- East Hartford17
- East Norwalk17
- East Windsor17
- Ellington17
- Farmington17
- Georgetown17
- Glastonbury17
- Glastonbury Center17
- Glenville17
- Greenwich17
- Hazardville17
- Heritage Village17
- Higganum17
- Kensington17
- Lake Pocotopaug17
- Manchester17
- Meriden17
- Moodus17
- Mystic17
- New Britain17
- New Canaan17
- New Fairfield17
- Newington17
- Newtown17
- Noank17
- North Granby17
- North Stamford17
- Norwalk17
- Oakville17
- Old Greenwich17
- Old Mystic17
- Pawcatuck17
- Pemberwick17
- Plainville17
- Plymouth17
- Portland17
- Prospect17
- Ridgefield17
- Riverside17
- Rockville17
- Salmon Brook17
- Seymour17
- Shelton17
- Sherwood Manor17
- Simsbury Center17
- South Windsor17
- Southbury17
- Southwood Acres17
- Suffield Depot17
- Tariffville17
- Terramuggus17
- Terryville17
- Thomaston17
- Thompsonville17
- Washington17
- Watertown17
- Weatogue17
- West Simsbury17
- Wilton17
- Windsor17
- Windsor Locks17
- Wolcott17
- Woodbridge17
- Woodbury17
- Woodbury Center17
- Danbury16
- Bridgeport15
- Waterbury15
- Middletown14
- New Haven14
- West Cornwall14
- Baltic13
- Branford Center13
- Canaan13
- City of Milford (balance)13
- Coventry Lake13
- Crystal Lake13
- Danielson13
- East Brooklyn13
- Easton13
- Groton13
- Hartford13
- Jewett City13
- Kent13
- Killingly Center13
- Lisbon13
- Litchfield13
- Mansfield City13
- Milford13
- Moosup13
- New Hartford Center13
- New Milford13
- New Preston13
- North Branford13
- North Haven13
- Norwich13
- Orange13
- Plainfield13
- Plainfield Village13
- Pomfret Center13
- Preston City13
- South Coventry13
- South Windham13
- Southport13
- Stafford Springs13
- Tolland13
- Torrington13
- Wallingford13
- Wallingford Center13
- Wauregan13
- West Haven13
- West Torrington13
- Willimantic13
- Winchester Center13
- Windham13
- Woodmont13
- East Haven12
- Oxford12
- Storrs11
- West Hartford10
- Wethersfield10
- Central Waterford9
- Chester Center9
- Clinton9
- Colchester9
- Conning Towers-Nautilus Park9
- Deep River Center9
- East Haddam9
- Essex Village9
- Gales Ferry9
- Ledyard9
- Long Hill9
- Madison9
- Madison Center9
- Montville Center9
- New London9
- Niantic9
- North Grosvenor Dale9
- Old Saybrook9
- Old Saybrook Center9
- Oxoboxo River9
- Poquonock Bridge9
- Putnam9
- Quinebaug9
- Salem9
- Saybrook Manor9
- South Woodstock9
- Thompson9
- Uncasville9
- Westbrook Center9
- Branford8
- Northwest Harwinton8
- Trumbull8
- Guilford Center7
- Stafford7
- Hamden6
- Somers6
- Winsted6
- Middlebury4
- Waterford4
- Sherman3
- Stamford1
- Enfield0
- Guilford0
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