Air quality in Connecticut
Air quality index (AQI⁺) and PM2.5 air pollution in Connecticut • 10:21, May 31
Live most polluted city ranking
Real-time Connecticut most polluted city ranking
Learn more about global air quality
Which is the most polluted city in Connecticut?
- Shelton36
- Branford Center33
- East Hartford33
- Guilford Center33
- Lordship33
- Madison Center33
- New Milford33
- Woodmont33
- Clinton32
- Fairfield32
- Fenwick32
- Greater Bridgeport32
- Greens Farms32
- Milford32
- Old Saybrook Center32
- Orange32
- Saugatuck32
- Saybrook Manor32
- South Central Connecticut32
- Southport32
- Stratford32
- West Haven32
- Westbrook Center32
- Ansonia31
- Byram31
- Cos Cob31
- Darien Downtown31
- Derby31
- Groton31
- Madison31
- North Haven31
- Norwalk31
- Old Greenwich31
- Oronoque31
- Pemberwick31
- Riverside31
- Stamford31
- Trumbull Center31
- Weston31
- Woodbridge31
- Cannondale30
- Glenville30
- Greenwich town30
- Hartford30
- Killingworth30
- New Canaan30
- Northford30
- Quinnipiac University30
- Rock Ridge30
- Seymour30
- Tashua30
- Wilton Center30
- Montville29
- Old Lyme29
- Redding Center29
- Wallingford Center29
- Western Connecticut29
- Canterbury28
- Cheshire Village28
- Chester Center28
- Deep River Center28
- Durham28
- Essex Village28
- Lower Connecticut River Valley28
- Naugatuck28
- Niantic28
- Prospect28
- Ridgefield28
- Sandy Hook28
- Trumbull28
- Wallingford28
- Bethel27
- Cheshire27
- Cornwall27
- Lebanon27
- Lyme27
- Naugatuck Valley27
- Waterford27
- West Mountain27
- Heritage Village26
- Higganum26
- Long Hill, Southeastern Connecticut County26
- Meriden26
- Middlebury26
- New London26
- Plantsville26
- Poquonock Bridge26
- Waterbury26
- Waterford town26
- Middletown25
- Moodus25
- Noank25
- Oakville25
- Ashford24
- Bridgeport24
- Conning Towers-Nautilus Park24
- Gales Ferry24
- Kensington24
- Mystic24
- New Haven24
- Old Mystic24
- Oxoboxo River24
- Pawcatuck24
- Plainfield24
- Salem24
- Southington24
- Watertown24
- Woodbury Center24
- Bethlehem Village23
- Bigelow Corners23
- Bristol23
- Cromwell23
- East Hampton23
- Lake Pocotopaug23
- Mansfield23
- New Britain23
- Newington23
- Plainville23
- Plymouth23
- Portland23
- Sherman23
- Southeastern Connecticut23
- Stafford23
- Terryville23
- Thomaston23
- Windsor Locks23
- Baltic22
- Colchester22
- Farmington22
- Glastonbury22
- Jewett City22
- Lisbon22
- Mashantucket22
- New Preston22
- Terramuggus22
- Washington22
- Wethersfield22
- Berlin21
- Coventry Lake21
- Danielson21
- East Brooklyn21
- Gaylordsville21
- Glastonbury Center21
- Litchfield21
- Mansfield Center21
- Mechanicsville21
- Moosup21
- North Grosvenor Dale21
- Northeastern Connecticut21
- Northwest Harwinton21
- Oxford21
- Plainfield Village21
- Pomfret21
- Quasset Lake21
- Quinebaug21
- South Coventry21
- South Windham21
- South Woodstock21
- Storrs21
- Wauregan21
- Willimantic21
- Canton20
- Canton Valley20
- Collinsville20
- Deep River20
- Enfield20
- Torrington20
- Torrington town20
- Westport20
- Winchester20
- Blue Hills19
- Branford19
- Canaan19
- Capitol19
- Crystal Lake19
- Ellington19
- Manchester19
- New Hartford Center19
- Northwest Hills19
- Riverton19
- Rockville19
- Simsbury Center19
- South Windsor19
- Stafford Springs19
- Tariffville19
- Weatogue19
- West Simsbury19
- Windsor19
- Winsted19
- Broad Brook18
- Coventry18
- Hazardville18
- Newtown18
- North Granby18
- Salmon Brook18
- Sherwood Manor18
- Somers18
- Southwood Acres18
- Suffield Depot18
- Thompsonville18
- Tolland18
- Woodbury18
- Greenwich17
- Hamden17
- West Hartford17
- Milford town16
- Guilford15
- East Haven14
- Danbury11
- Colebrook9
- Hebron7
- Norwich7
