Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
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 | Bridgeport | 44 |
| 2 | Stamford | 44 |
| 3 | Wauregan | 42 |
| 4 | East Haven | 38 |
| 5 | New Haven | 35 |
| 6 | Shelton | 35 |
| 7 | Trumbull | 34 |
| 8 | Stafford | 33 |
| 9 | Waterford | 33 |
| 10 | Old Greenwich | 32 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
71 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Hebron | 9 |
| 2 | Southington | 13 |
| 3 | Guilford | 14 |
| 4 | Branford | 18 |
| 5 | Enfield | 18 |
| 6 | West Hartford | 19 |
| 7 | Ledyard | 20 |
| 8 | Windham | 20 |
| 9 | Clinton | 21 |
| 10 | Groton | 21 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
Good
Moderate
Unhealthy for sensitive groups
Unhealthy
Very unhealthy
Hazardous
News
The latest air quality news and resources.
Connecticut air quality data attribution
71Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
65 Anonymous contributors65 stations
65 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Bridgeport 44
- Stamford 44
- Wauregan 42
- East Haven 38
- Canaan 35
- Kent 35
- New Haven 35
- Shelton 35
- New Preston 34
- Trumbull 34
- Winchester Center 34
- New Hartford Center 33
- New Milford 33
- North Granby 33
- Salmon Brook 33
- Sherwood Manor 33
- Stafford 33
- Thompsonville 33
- Washington 33
- Waterford 33
- Bethlehem Village 32
- Canton Valley 32
- Collinsville 32
- Hazardville 32
- Litchfield 32
- New Fairfield 32
- Northwest Harwinton 32
- Old Greenwich 32
- Simsbury Center 32
- Southwood Acres 32
- Suffield Depot 32
- Tariffville 32
- Torrington 32
- Weatogue 32
- West Simsbury 32
- Windsor Locks 32
- Bethel 31
- Blue Hills 31
- Bristol 31
- Crystal Lake 31
- East Windsor 31
- Ellington 31
- Fairfield 31
- Farmington 31
- Oakville 31
- Plainville 31
- Plymouth 31
- Rockville 31
- South Windsor 31
- Stafford Springs 31
- Stratford 31
- Terryville 31
- Thomaston 31
- Watertown 31
- Windsor 31
- Woodbury Center 31
- Hartford 30
- Heritage Village 30
- Manchester 30
- Newington 30
- Pomfret Center 30
- Southbury 30
- Westport 30
- Wethersfield 30
- Wolcott 30
- Coventry Lake 29
- Georgetown 29
- Greenwich 29
- Hamden 29
- New Britain 29
- North Grosvenor Dale 29
- North Stamford 29
- Quinebaug 29
- South Woodstock 29
- East Hartford 28
- Glastonbury Center 28
- Kensington 28
- Milford 28
- Putnam 28
- South Coventry 28
- Storrs 28
- Thompson 28
- Waterbury 28
- Woodbridge 28
- Byram 27
- Glenville 27
- Pemberwick 27
- Woodbury 27
- Cos Cob 26
- Killingly Center 26
- Middlebury 26
- Naugatuck 26
- New Canaan 26
- Oxford 26
- Prospect 26
- Riverside 26
- Willimantic 26
- Wilton 26
- Cheshire 25
- Cheshire Village 25
- Cromwell 25
- Danielson 25
- East Brooklyn 25
- Easton 25
- Meriden 25
- New London 25
- Newtown 25
- Old Lyme 25
- Portland 25
- Seymour 25
- Somers 25
- Terramuggus 25
- West Cornwall 25
- West Torrington 25
- Ansonia 24
- Darien 24
- Lake Pocotopaug 24
- Norwalk 24
- Wallingford 24
- Danbury 23
- Derby 23
- East Hampton 23
- East Norwalk 23
- Mansfield City 23
- Redding 23
- Sherman 23
- South Windham 23
- Tolland 23
- Wallingford Center 23
- Colchester 22
- Durham 22
- Glastonbury 22
- Higganum 22
- Middletown 22
- Montville Center 22
- Moosup 22
- North Haven 22
- Plainfield 22
- Plainfield Village 22
- Southport 22
- Winsted 22
- Baltic 21
- City of Milford (balance) 21
- Clinton 21
- Groton 21
- Moodus 21
- Norwich 21
- Orange 21
- Ridgefield 21
- West Haven 21
- East Haddam 20
- Jewett City 20
- Ledyard 20
- Lisbon 20
- North Branford 20
- Salem 20
- Windham 20
- Woodmont 20
- Branford Center 19
- Chester Center 19
- West Hartford 19
- Branford 18
- Deep River Center 18
- Enfield 18
- Madison 18
- Preston City 18
- Essex Village 17
- Guilford Center 17
- Madison Center 17
- Oxoboxo River 17
- Uncasville 17
- Gales Ferry 16
- Niantic 16
- Old Saybrook 16
- Old Saybrook Center 16
- Saybrook Manor 16
- Westbrook Center 16
- Central Waterford 15
- Conning Towers-Nautilus Park 15
- Long Hill 15
- Old Mystic 15
- Guilford 14
- Mystic 14
- Noank 14
- Pawcatuck 14
- Poquonock Bridge 14
- Southington 13
- Hebron 9
AQI US, Metric