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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 | Old Lyme | 41 |
| 2 | Pomfret Center | 33 |
| 3 | Stafford | 30 |
| 4 | Shelton | 27 |
| 5 | Woodbury | 26 |
| 6 | East Haven | 25 |
| 7 | Southington | 25 |
| 8 | Stamford | 25 |
| 9 | East Hartford | 24 |
| 10 | Glastonbury | 24 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
73 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | North Stamford | 8 |
| 2 | Ridgefield | 8 |
| 3 | Milford | 11 |
| 4 | West Hartford | 11 |
| 5 | Waterford | 12 |
| 6 | Wauregan | 12 |
| 7 | Branford | 13 |
| 8 | Guilford | 13 |
| 9 | Danbury | 14 |
| 10 | Westport | 14 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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News
The latest air quality news and resources.
Connecticut air quality data attribution
73Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
67 Anonymous contributors67 stations
67 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Old Lyme 41
- Pomfret Center 33
- Stafford 30
- Shelton 27
- Woodbury 26
- East Haven 25
- Southington 25
- Stamford 25
- East Hartford 24
- Glastonbury 24
- Mansfield City 24
- Sherman 24
- Waterbury 24
- Norwich 23
- Storrs 23
- Clinton 22
- Hartford 22
- Somers 22
- Tolland 22
- Windham 22
- Greenwich 21
- Middlebury 21
- Montville Center 21
- Newtown 21
- Redding 21
- Groton 20
- New Haven 20
- Oxford 20
- Trumbull 20
- Winsted 20
- Fairfield 19
- Hamden 19
- Hebron 19
- Ledyard 19
- Madison 19
- Middletown 19
- Bridgeport 17
- Old Greenwich 17
- Canaan 16
- Kent 16
- Woodbridge 16
- Bethel 15
- Bethlehem Village 15
- Blue Hills 15
- Bristol 15
- Byram 15
- Canton Valley 15
- Collinsville 15
- Cos Cob 15
- Crystal Lake 15
- East Windsor 15
- Easton 15
- Ellington 15
- Enfield 15
- Farmington 15
- Georgetown 15
- Glastonbury Center 15
- Glenville 15
- Hazardville 15
- Heritage Village 15
- Kensington 15
- Litchfield 15
- Manchester 15
- Naugatuck 15
- New Britain 15
- New Canaan 15
- New Fairfield 15
- New Hartford Center 15
- New London 15
- New Milford 15
- New Preston 15
- Newington 15
- North Granby 15
- Northwest Harwinton 15
- Oakville 15
- Pemberwick 15
- Plainville 15
- Plymouth 15
- Prospect 15
- Riverside 15
- Rockville 15
- Salmon Brook 15
- Seymour 15
- Sherwood Manor 15
- Simsbury Center 15
- South Windsor 15
- Southbury 15
- Southwood Acres 15
- Stafford Springs 15
- Suffield Depot 15
- Tariffville 15
- Terryville 15
- Thomaston 15
- Thompsonville 15
- Torrington 15
- Washington 15
- Watertown 15
- Weatogue 15
- West Cornwall 15
- West Simsbury 15
- West Torrington 15
- Wethersfield 15
- Wilton 15
- Winchester Center 15
- Windsor 15
- Windsor Locks 15
- Wolcott 15
- Woodbury Center 15
- Ansonia 14
- Cheshire 14
- Cheshire Village 14
- Coventry Lake 14
- Cromwell 14
- Danbury 14
- Darien 14
- Derby 14
- Durham 14
- East Norwalk 14
- Killingly Center 14
- Lake Pocotopaug 14
- Meriden 14
- North Grosvenor Dale 14
- North Haven 14
- Norwalk 14
- Orange 14
- Portland 14
- Putnam 14
- Quinebaug 14
- South Coventry 14
- South Woodstock 14
- Southport 14
- Terramuggus 14
- Thompson 14
- Wallingford 14
- Wallingford Center 14
- Westport 14
- Branford 13
- Branford Center 13
- City of Milford (balance) 13
- Danielson 13
- East Brooklyn 13
- East Hampton 13
- Guilford 13
- Guilford Center 13
- Higganum 13
- North Branford 13
- South Windham 13
- Stratford 13
- West Haven 13
- Willimantic 13
- Woodmont 13
- Chester Center 12
- Colchester 12
- Deep River Center 12
- East Haddam 12
- Essex Village 12
- Madison Center 12
- Moodus 12
- Moosup 12
- Waterford 12
- Wauregan 12
- Westbrook Center 12
- Baltic 11
- Central Waterford 11
- Conning Towers-Nautilus Park 11
- Gales Ferry 11
- Jewett City 11
- Lisbon 11
- Long Hill 11
- Milford 11
- Niantic 11
- Old Saybrook 11
- Old Saybrook Center 11
- Oxoboxo River 11
- Plainfield 11
- Plainfield Village 11
- Poquonock Bridge 11
- Preston City 11
- Salem 11
- Saybrook Manor 11
- Uncasville 11
- West Hartford 11
- Mystic 10
- Noank 10
- Old Mystic 10
- Pawcatuck 10
- North Stamford 8
- Ridgefield 8
AQI US, Metric