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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 | Shelton | 41 |
| 2 | Wauregan | 40 |
| 3 | Mansfield City | 31 |
| 4 | Pomfret Center | 30 |
| 5 | Oxford | 26 |
| 6 | Old Greenwich | 25 |
| 7 | Waterbury | 24 |
| 8 | Woodbridge | 23 |
| 9 | Trumbull | 21 |
| 10 | East Hartford | 20 |
(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 | 3 |
| 2 | Branford | 8 |
| 3 | Guilford | 8 |
| 4 | Waterford | 8 |
| 5 | Greenwich | 9 |
| 6 | Middlebury | 9 |
| 7 | West Hartford | 9 |
| 8 | Westport | 9 |
| 9 | Milford | 10 |
| 10 | Somers | 10 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Moderate
Unhealthy for sensitive groups
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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?
- Shelton 41
- Wauregan 40
- Mansfield City 31
- Pomfret Center 30
- Stratford 28
- Oxford 26
- Old Greenwich 25
- Waterbury 24
- Bethel 23
- Bethlehem Village 23
- Bristol 23
- Canton Valley 23
- Collinsville 23
- Farmington 23
- Georgetown 23
- Heritage Village 23
- Litchfield 23
- Naugatuck 23
- New Fairfield 23
- New Hartford Center 23
- New Milford 23
- New Preston 23
- North Granby 23
- Northwest Harwinton 23
- Oakville 23
- Plainville 23
- Plymouth 23
- Salmon Brook 23
- Sherwood Manor 23
- Simsbury Center 23
- Southbury 23
- Suffield Depot 23
- Tariffville 23
- Terryville 23
- Thomaston 23
- Thompsonville 23
- Torrington 23
- Washington 23
- Watertown 23
- Weatogue 23
- West Simsbury 23
- Wolcott 23
- Woodbridge 23
- Woodbury Center 23
- Ansonia 22
- Blue Hills 22
- Cheshire 22
- Cheshire Village 22
- Cos Cob 22
- Derby 22
- Easton 22
- Glenville 22
- Hazardville 22
- Kensington 22
- New Britain 22
- New Canaan 22
- Newington 22
- Pemberwick 22
- Prospect 22
- Riverside 22
- Seymour 22
- South Windsor 22
- Southwood Acres 22
- Wilton 22
- Windsor 22
- Windsor Locks 22
- Byram 21
- Darien 21
- East Norwalk 21
- East Windsor 21
- Glastonbury Center 21
- Kent 21
- Meriden 21
- Norwalk 21
- Trumbull 21
- Wallingford 21
- Wethersfield 21
- Winchester Center 21
- Cromwell 20
- Crystal Lake 20
- East Hartford 20
- Ellington 20
- Manchester 20
- North Haven 20
- Orange 20
- Portland 20
- Rockville 20
- Southington 20
- Southport 20
- Stafford Springs 20
- Wallingford Center 20
- Canaan 19
- City of Milford (balance) 19
- Durham 19
- Groton 19
- Hartford 19
- Norwich 19
- Quinebaug 19
- Stafford 19
- Windham 19
- Coventry Lake 18
- New London 18
- North Grosvenor Dale 18
- Putnam 18
- South Coventry 18
- South Woodstock 18
- Thompson 18
- West Haven 18
- Woodmont 18
- Branford Center 17
- Bridgeport 17
- Danbury 17
- East Brooklyn 17
- East Hampton 17
- Higganum 17
- Killingly Center 17
- Lake Pocotopaug 17
- North Branford 17
- Stamford 17
- Storrs 17
- Terramuggus 17
- Willimantic 17
- Baltic 16
- Chester Center 16
- Colchester 16
- Danielson 16
- Deep River Center 16
- East Haddam 16
- Guilford Center 16
- Madison 16
- Madison Center 16
- Montville Center 16
- Moodus 16
- Moosup 16
- Plainfield 16
- Plainfield Village 16
- Salem 16
- South Windham 16
- Clinton 15
- East Haven 15
- Essex Village 15
- Jewett City 15
- Lisbon 15
- New Haven 15
- Newtown 15
- Old Lyme 15
- Old Saybrook 15
- Sherman 15
- Tolland 15
- West Cornwall 15
- West Torrington 15
- Westbrook Center 15
- Woodbury 15
- Gales Ferry 14
- Glastonbury 14
- Hamden 14
- Niantic 14
- Old Saybrook Center 14
- Oxoboxo River 14
- Preston City 14
- Saybrook Manor 14
- Uncasville 14
- Winsted 14
- Central Waterford 13
- Conning Towers-Nautilus Park 13
- Enfield 13
- Ledyard 13
- Long Hill 13
- Middletown 13
- Mystic 13
- Noank 13
- Old Mystic 13
- Pawcatuck 13
- Poquonock Bridge 13
- North Stamford 12
- Redding 12
- Ridgefield 12
- Fairfield 11
- Milford 10
- Somers 10
- Greenwich 9
- Middlebury 9
- West Hartford 9
- Westport 9
- Branford 8
- Guilford 8
- Waterford 8
- Hebron 3
AQI US, Metric