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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 | 50 |
| 2 | Woodbridge | 45 |
| 3 | Redding | 37 |
| 4 | Stamford | 37 |
| 5 | Old Greenwich | 33 |
| 6 | Danbury | 31 |
| 7 | Greenwich | 31 |
| 8 | North Stamford | 31 |
| 9 | Trumbull | 31 |
| 10 | Bridgeport | 30 |
(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 | 7 |
| 2 | Guilford | 9 |
| 3 | Middlebury | 9 |
| 4 | Milford | 11 |
| 5 | Enfield | 12 |
| 6 | Somers | 12 |
| 7 | West Hartford | 12 |
| 8 | Pomfret Center | 13 |
| 9 | Winsted | 13 |
| 10 | Clinton | 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
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?
- Byram 52
- Glenville 52
- Pemberwick 52
- Wauregan 50
- Cos Cob 49
- Riverside 47
- Woodbridge 45
- New Canaan 43
- Darien 41
- Kent 41
- New Fairfield 41
- Wilton 40
- Bethel 39
- East Norwalk 38
- Georgetown 38
- Norwalk 38
- Redding 37
- Stamford 37
- New Milford 36
- New Preston 35
- Easton 34
- Washington 34
- Old Greenwich 33
- Southport 33
- Canaan 32
- Heritage Village 32
- Southbury 32
- Bethlehem Village 31
- Danbury 31
- Greenwich 31
- Litchfield 31
- North Stamford 31
- Trumbull 31
- Woodbury Center 31
- Bridgeport 30
- Oakville 30
- Thomaston 30
- Torrington 30
- Watertown 30
- Winchester Center 30
- Ansonia 29
- City of Milford (balance) 29
- Derby 29
- Naugatuck 29
- Northwest Harwinton 29
- Plymouth 29
- Seymour 29
- Stratford 29
- Terryville 29
- Waterbury 29
- Orange 28
- Prospect 28
- Ridgefield 28
- West Haven 28
- Wolcott 28
- Woodmont 28
- Bristol 27
- Cheshire 27
- Cheshire Village 27
- Fairfield 27
- New Hartford Center 27
- Shelton 27
- Blue Hills 26
- Branford Center 26
- Canton Valley 26
- Colchester 26
- Collinsville 26
- Coventry Lake 26
- Cromwell 26
- Durham 26
- Farmington 26
- Glastonbury Center 26
- Guilford Center 26
- Higganum 26
- Kensington 26
- Madison 26
- Madison Center 26
- Meriden 26
- New Britain 26
- Newington 26
- North Branford 26
- North Granby 26
- North Haven 26
- Plainville 26
- Portland 26
- Salem 26
- Salmon Brook 26
- Simsbury Center 26
- South Coventry 26
- South Windham 26
- Stafford 26
- Tariffville 26
- Wallingford 26
- Wallingford Center 26
- Weatogue 26
- West Simsbury 26
- Westbrook Center 26
- Wethersfield 26
- Willimantic 26
- Baltic 25
- Central Waterford 25
- Chester Center 25
- Conning Towers-Nautilus Park 25
- Crystal Lake 25
- Danielson 25
- Deep River Center 25
- East Brooklyn 25
- East Haddam 25
- East Hampton 25
- East Haven 25
- Ellington 25
- Essex Village 25
- Gales Ferry 25
- Hartford 25
- Jewett City 25
- Killingly Center 25
- Lake Pocotopaug 25
- Lisbon 25
- Long Hill 25
- Manchester 25
- Moodus 25
- Moosup 25
- Mystic 25
- Niantic 25
- Noank 25
- North Grosvenor Dale 25
- Old Mystic 25
- Old Saybrook 25
- Old Saybrook Center 25
- Oxoboxo River 25
- Plainfield 25
- Plainfield Village 25
- Poquonock Bridge 25
- Preston City 25
- Putnam 25
- Quinebaug 25
- Rockville 25
- Saybrook Manor 25
- South Windsor 25
- South Woodstock 25
- Stafford Springs 25
- Suffield Depot 25
- Terramuggus 25
- Thompson 25
- Uncasville 25
- West Cornwall 25
- West Torrington 25
- Windsor 25
- Windsor Locks 25
- East Windsor 24
- Hazardville 24
- Pawcatuck 24
- Sherwood Manor 24
- Southwood Acres 24
- Thompsonville 24
- Westport 24
- Newtown 23
- New London 22
- Groton 21
- Hamden 21
- Oxford 21
- East Hartford 20
- Glastonbury 20
- New Haven 20
- Montville Center 19
- Storrs 19
- Windham 19
- Ledyard 18
- Middletown 18
- Woodbury 18
- Mansfield City 17
- Tolland 17
- Branford 16
- Sherman 16
- Waterford 16
- Clinton 15
- Norwich 15
- Southington 15
- Old Lyme 14
- Pomfret Center 13
- Winsted 13
- Enfield 12
- Somers 12
- West Hartford 12
- Milford 11
- Guilford 9
- Middlebury 9
- Hebron 7
AQI US, Metric