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 | Madison | 97 |
| 2 | Stratford | 56 |
| 3 | Guilford Center | 41 |
| 4 | Guilford | 33 |
| 5 | Groton | 23 |
| 6 | Branford | 20 |
| 7 | Bridgeport | 11 |
| 8 | East Haven | 11 |
| 9 | Oxford | 11 |
| 10 | Waterbury | 10 |
(local time)
SEE WORLD AQI RANKINGAir Quality Data contributor(s)
Station(s) operated by
Contributors
See all
40
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Northwest Harwinton | 0 |
| 2 | Sherman | 0 |
| 3 | Somers | 0 |
| 4 | Winsted | 0 |
| 5 | Enfield | 1 |
| 6 | Hebron | 1 |
| 7 | Middlebury | 1 |
| 8 | Stamford | 1 |
| 9 | West Hartford | 1 |
| 10 | Danbury | 2 |
(local time)
SEE WORLD AQI RANKING
3D 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 40
- 40 Anonymous contributors
40 stations
Anonymous
Which is the most polluted city in Connecticut?
- Madison97
- Stratford56
- Guilford Center41
- Guilford33
- Groton23
- Deep River Center21
- Essex Village21
- Niantic21
- Old Saybrook21
- Old Saybrook Center21
- Branford20
- Branford Center17
- Chester Center17
- Clinton17
- Colchester17
- Cromwell17
- East Haddam17
- East Hampton17
- Higganum17
- Lake Pocotopaug17
- Madison Center17
- Moodus17
- Portland17
- Salem17
- Saybrook Manor17
- Terramuggus17
- Westbrook Center17
- Ansonia13
- Bethel13
- Bethlehem Village13
- Byram13
- Cheshire13
- Cheshire Village13
- City of Milford (balance)13
- Cos Cob13
- Derby13
- East Norwalk13
- Easton13
- Georgetown13
- Glenville13
- Greenwich13
- Heritage Village13
- Milford13
- New Canaan13
- New Fairfield13
- New Milford13
- Newtown13
- North Branford13
- North Haven13
- North Stamford13
- Norwalk13
- Oakville13
- Old Greenwich13
- Orange13
- Pemberwick13
- Prospect13
- Ridgefield13
- Riverside13
- Seymour13
- Shelton13
- Southbury13
- Southport13
- Wallingford13
- Wallingford Center13
- Washington13
- Watertown13
- West Haven13
- Wilton13
- Wolcott13
- Woodbridge13
- Woodbury13
- Woodbury Center13
- Woodmont13
- Bridgeport11
- East Haven11
- Oxford11
- Waterbury10
- Baltic9
- Blue Hills9
- Bristol9
- Canaan9
- Canton Valley9
- Central Waterford9
- Collinsville9
- Conning Towers-Nautilus Park9
- Coventry Lake9
- Crystal Lake9
- Danielson9
- Durham9
- East Brooklyn9
- East Windsor9
- Ellington9
- Farmington9
- Gales Ferry9
- Glastonbury9
- Glastonbury Center9
- Hazardville9
- Jewett City9
- Kensington9
- Kent9
- Killingly Center9
- Ledyard9
- Lisbon9
- Litchfield9
- Long Hill9
- Manchester9
- Mansfield City9
- Meriden9
- Montville Center9
- Moosup9
- New Britain9
- New Hartford Center9
- New London9
- New Preston9
- Newington9
- North Granby9
- North Grosvenor Dale9
- Norwich9
- Oxoboxo River9
- Plainfield9
- Plainfield Village9
- Plainville9
- Plymouth9
- Pomfret Center9
- Poquonock Bridge9
- Preston City9
- Putnam9
- Quinebaug9
- Rockville9
- Salmon Brook9
- Sherwood Manor9
- Simsbury Center9
- South Coventry9
- South Windham9
- South Windsor9
- South Woodstock9
- Southwood Acres9
- Stafford Springs9
- Suffield Depot9
- Tariffville9
- Terryville9
- Thomaston9
- Thompson9
- Thompsonville9
- Tolland9
- Torrington9
- Uncasville9
- Waterford9
- Wauregan9
- Weatogue9
- West Simsbury9
- West Torrington9
- Willimantic9
- Winchester Center9
- Windham9
- Windsor9
- Windsor Locks9
- Trumbull8
- New Haven6
- Wethersfield6
- Mystic5
- Noank5
- Old Mystic5
- Pawcatuck5
- Hamden4
- Hartford4
- Westport4
- East Hartford3
- Fairfield3
- Middletown3
- West Cornwall3
- Danbury2
- Stafford2
- Storrs2
- Enfield1
- Hebron1
- Middlebury1
- Stamford1
- West Hartford1
- Northwest Harwinton0
- Sherman0
- Somers0
- Winsted0
