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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 |  Wauregan | 52 |
| 2 | Woodbury | 31 |
| 3 | Groton | 30 |
| 4 | Pomfret Center | 29 |
| 5 | East Hartford | 28 |
| 6 | Stafford | 28 |
| 7 | Waterbury | 28 |
| 8 | Hartford | 27 |
| 9 | Storrs | 27 |
| 10 | Glastonbury | 26 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
72 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Milford | 7 |
| 2 | Branford | 10 |
| 3 | Guilford | 10 |
| 4 | Hebron | 10 |
| 5 | North Stamford | 11 |
| 6 | Ridgefield | 11 |
| 7 | Westport | 11 |
| 8 | Fairfield | 14 |
| 9 | Clinton | 15 |
| 10 | Shelton | 15 |
(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
72Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
66 Anonymous contributors66 stations
66 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Wauregan 52
- Byram 46
- Glenville 46
- Pemberwick 46
- Cos Cob 44
- Riverside 43
- New Canaan 39
- Darien 37
- East Norwalk 35
- Norwalk 35
- Wilton 35
- New Fairfield 34
- Bethel 33
- Georgetown 33
- Kent 31
- New Milford 31
- Southport 31
- Woodbury 31
- Easton 30
- Groton 30
- New Preston 29
- Pomfret Center 29
- Stratford 29
- Washington 29
- Bethlehem Village 28
- East Hartford 28
- Heritage Village 28
- Southbury 28
- Stafford 28
- Waterbury 28
- Woodbury Center 28
- Ansonia 27
- Canaan 27
- City of Milford (balance) 27
- Derby 27
- Hartford 27
- Litchfield 27
- Naugatuck 27
- Northwest Harwinton 27
- Oakville 27
- Plymouth 27
- Prospect 27
- Seymour 27
- Storrs 27
- Terryville 27
- Thomaston 27
- Torrington 27
- Watertown 27
- Winchester Center 27
- Bristol 26
- Canton Valley 26
- Cheshire 26
- Cheshire Village 26
- Collinsville 26
- Farmington 26
- Glastonbury 26
- Kensington 26
- Meriden 26
- New Britain 26
- New Hartford Center 26
- Newington 26
- North Granby 26
- North Haven 26
- Orange 26
- Plainville 26
- Salmon Brook 26
- Simsbury Center 26
- Tariffville 26
- Wallingford 26
- Wallingford Center 26
- Weatogue 26
- West Haven 26
- West Simsbury 26
- Wolcott 26
- Woodmont 26
- Blue Hills 25
- Branford Center 25
- Coventry Lake 25
- Cromwell 25
- Crystal Lake 25
- Durham 25
- East Hampton 25
- East Windsor 25
- Ellington 25
- Glastonbury Center 25
- Hazardville 25
- Higganum 25
- Lake Pocotopaug 25
- Manchester 25
- North Branford 25
- North Grosvenor Dale 25
- Portland 25
- Putnam 25
- Quinebaug 25
- Rockville 25
- Sherwood Manor 25
- South Coventry 25
- South Windham 25
- South Windsor 25
- South Woodstock 25
- Southwood Acres 25
- Stafford Springs 25
- Suffield Depot 25
- Terramuggus 25
- Thompson 25
- Thompsonville 25
- Wethersfield 25
- Willimantic 25
- Windsor 25
- Windsor Locks 25
- Baltic 24
- Bridgeport 24
- Chester Center 24
- Colchester 24
- East Brooklyn 24
- East Haddam 24
- Guilford Center 24
- Killingly Center 24
- Madison Center 24
- Moodus 24
- Redding 24
- Tolland 24
- Danielson 23
- Deep River Center 23
- Essex Village 23
- Jewett City 23
- Lisbon 23
- Madison 23
- Moosup 23
- Plainfield 23
- Plainfield Village 23
- Salem 23
- Westbrook Center 23
- Woodbridge 23
- Conning Towers-Nautilus Park 22
- Gales Ferry 22
- Middlebury 22
- Niantic 22
- Old Lyme 22
- Old Saybrook 22
- Old Saybrook Center 22
- Oxoboxo River 22
- Preston City 22
- Saybrook Manor 22
- Sherman 22
- Southington 22
- Uncasville 22
- Windham 22
- Central Waterford 21
- Ledyard 21
- Long Hill 21
- Middletown 21
- Mystic 21
- Newtown 21
- Old Mystic 21
- Poquonock Bridge 21
- Mansfield City 20
- Noank 20
- Oxford 20
- Pawcatuck 20
- Winsted 20
- Danbury 19
- Greenwich 19
- New Haven 19
- New London 19
- Somers 19
- West Cornwall 19
- West Hartford 19
- West Torrington 19
- Montville Center 18
- Norwich 18
- Old Greenwich 18
- Stamford 18
- Trumbull 18
- East Haven 17
- Enfield 16
- Hamden 16
- Waterford 16
- Clinton 15
- Shelton 15
- Fairfield 14
- North Stamford 11
- Ridgefield 11
- Westport 11
- Branford 10
- Guilford 10
- Hebron 10
- Milford 7
AQI US, Metric