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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 | 53 |
| 2 | Greenwich | 44 |
| 3 | Redding | 40 |
| 4 | Trumbull | 39 |
| 5 | Fairfield | 38 |
| 6 | North Stamford | 38 |
| 7 | Stamford | 38 |
| 8 | Newtown | 37 |
| 9 | Ridgefield | 35 |
| 10 | Waterbury | 35 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
69 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Guilford | 2 |
| 2 | Milford | 6 |
| 3 | Enfield | 8 |
| 4 | Middlebury | 11 |
| 5 | Somers | 12 |
| 6 | Branford | 13 |
| 7 | Southington | 13 |
| 8 | Clinton | 14 |
| 9 | Ledyard | 14 |
| 10 | Middletown | 14 |
(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
69Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
63 Anonymous contributors63 stations
63 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Wauregan 53
- Canaan 47
- North Granby 46
- Kent 45
- Salmon Brook 45
- Greenwich 44
- Hazardville 44
- Quinebaug 44
- Sherwood Manor 44
- Suffield Depot 44
- Thompsonville 44
- Winchester Center 44
- North Grosvenor Dale 43
- Southwood Acres 43
- Stafford Springs 43
- New Preston 42
- Thompson 42
- Crystal Lake 41
- New Hartford Center 41
- South Woodstock 41
- Redding 40
- Torrington 40
- Windsor Locks 40
- East Windsor 39
- Litchfield 39
- New Milford 39
- Tariffville 39
- Trumbull 39
- Washington 39
- West Simsbury 39
- Canton Valley 38
- Fairfield 38
- North Stamford 38
- Simsbury Center 38
- Stamford 38
- Collinsville 37
- New Fairfield 37
- Newtown 37
- Northwest Harwinton 37
- Bethlehem Village 36
- Ellington 36
- Putnam 36
- Weatogue 36
- Plymouth 35
- Ridgefield 35
- Thomaston 35
- Waterbury 35
- Windsor 35
- Bethel 34
- Blue Hills 34
- South Windsor 34
- Terryville 34
- Watertown 34
- Woodbury Center 34
- Bristol 33
- Danielson 33
- East Brooklyn 33
- Farmington 33
- Heritage Village 33
- Killingly Center 33
- Oakville 33
- Rockville 33
- Shelton 33
- Woodbury 33
- Bridgeport 32
- Coventry Lake 32
- Danbury 32
- Manchester 32
- Moosup 32
- Newington 32
- Old Greenwich 32
- Plainville 32
- South Coventry 32
- Southbury 32
- Wethersfield 32
- Willimantic 32
- Georgetown 31
- Glastonbury Center 31
- New Britain 31
- Wolcott 31
- Oxford 30
- Plainfield 30
- Plainfield Village 30
- South Windham 30
- Glenville 29
- Kensington 29
- Pomfret Center 29
- Sherman 29
- Stratford 29
- East Haven 28
- Naugatuck 28
- Pemberwick 28
- Terramuggus 28
- Wilton 28
- Baltic 27
- Byram 27
- Cheshire 27
- Cheshire Village 27
- Colchester 27
- Cos Cob 27
- Cromwell 27
- East Hampton 27
- Easton 27
- Jewett City 27
- Lake Pocotopaug 27
- Lisbon 27
- Meriden 27
- New Canaan 27
- Portland 27
- Prospect 27
- Seymour 27
- Stafford 27
- Waterford 27
- Ansonia 26
- Derby 26
- Durham 26
- East Haddam 26
- Higganum 26
- Moodus 26
- Riverside 26
- Salem 26
- Wallingford 26
- Wallingford Center 26
- West Torrington 26
- Chester Center 25
- Darien 25
- Deep River Center 25
- East Norwalk 25
- North Haven 25
- Norwalk 25
- Preston City 25
- West Cornwall 25
- City of Milford (balance) 24
- Essex Village 24
- Gales Ferry 24
- North Branford 24
- Orange 24
- Oxoboxo River 24
- Southport 24
- Uncasville 24
- West Haven 24
- Woodbridge 24
- Branford Center 23
- Conning Towers-Nautilus Park 23
- Guilford Center 23
- Madison Center 23
- New London 23
- Niantic 23
- Old Lyme 23
- Old Saybrook 23
- Old Saybrook Center 23
- Saybrook Manor 23
- Westbrook Center 23
- Woodmont 23
- Central Waterford 22
- Hartford 22
- Long Hill 22
- Madison 22
- Old Mystic 22
- Glastonbury 21
- Mystic 21
- New Haven 21
- Noank 21
- Pawcatuck 21
- Poquonock Bridge 21
- Groton 20
- Hamden 20
- Montville Center 19
- Tolland 19
- East Hartford 18
- Hebron 18
- Storrs 18
- Windham 18
- Norwich 16
- Westport 16
- Winsted 16
- Mansfield City 15
- West Hartford 15
- Clinton 14
- Ledyard 14
- Middletown 14
- Branford 13
- Southington 13
- Somers 12
- Middlebury 11
- Enfield 8
- Milford 6
- Guilford 2
AQI US, Metric