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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 | Shelton | 43 |
| 3 | Ridgefield | 27 |
| 4 | Danbury | 25 |
| 5 | North Stamford | 25 |
| 6 | Pomfret Center | 24 |
| 7 | Woodbridge | 21 |
| 8 | Bridgeport | 20 |
| 9 | Waterbury | 19 |
| 10 | Hartford | 18 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
68 Contributors
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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
68Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
62 Anonymous contributors62 stations
62 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Glenville 54
- Byram 53
- Cos Cob 53
- New Canaan 53
- New Fairfield 53
- Pemberwick 53
- Riverside 53
- Wilton 53
- Bethel 52
- Darien 52
- East Norwalk 52
- Georgetown 52
- Kent 52
- New Milford 52
- New Preston 52
- Norwalk 52
- Easton 51
- Washington 51
- Southport 50
- Wauregan 50
- Heritage Village 49
- Bethlehem Village 48
- Southbury 48
- Woodbury Center 48
- Ansonia 47
- Derby 47
- Litchfield 47
- Seymour 47
- Watertown 47
- City of Milford (balance) 46
- Naugatuck 46
- Stratford 46
- Oakville 45
- Orange 45
- Canaan 44
- Thomaston 44
- Torrington 44
- Woodmont 44
- Northwest Harwinton 43
- Plymouth 43
- Prospect 43
- Shelton 43
- West Haven 43
- Wolcott 43
- Bristol 42
- Cheshire 42
- Cheshire Village 42
- North Haven 42
- Terryville 42
- Winchester Center 42
- Branford Center 41
- Collinsville 41
- Farmington 41
- Meriden 41
- North Branford 41
- Plainville 41
- Wallingford 41
- Wallingford Center 41
- Canton Valley 40
- Durham 40
- Guilford Center 40
- Kensington 40
- New Britain 40
- New Hartford Center 40
- Newington 39
- West Simsbury 39
- Cromwell 38
- Madison Center 38
- Portland 38
- Weatogue 38
- Higganum 37
- Madison 37
- Simsbury Center 37
- Wethersfield 36
- Blue Hills 35
- Chester Center 35
- Deep River Center 35
- East Haddam 35
- East Hampton 35
- Essex Village 35
- Glastonbury Center 35
- Lake Pocotopaug 35
- Moodus 35
- Salmon Brook 35
- Saybrook Manor 35
- Tariffville 35
- Westbrook Center 35
- Manchester 34
- North Granby 34
- Old Lyme 34
- Old Saybrook 34
- Old Saybrook Center 34
- South Windsor 34
- Terramuggus 34
- Windsor 34
- Colchester 33
- Windsor Locks 33
- East Windsor 32
- Niantic 32
- Salem 32
- Southwood Acres 32
- Suffield Depot 32
- Coventry Lake 31
- Ellington 31
- Hazardville 31
- Rockville 31
- Thompsonville 31
- Sherwood Manor 30
- South Coventry 30
- Central Waterford 29
- Crystal Lake 29
- Oxoboxo River 29
- South Windham 29
- Stafford Springs 29
- Willimantic 29
- Baltic 28
- Conning Towers-Nautilus Park 28
- Gales Ferry 28
- Uncasville 28
- Lisbon 27
- Long Hill 27
- Ridgefield 27
- Jewett City 26
- Noank 26
- Poquonock Bridge 26
- Danbury 25
- North Stamford 25
- Old Mystic 25
- Plainfield 25
- Plainfield Village 25
- Preston City 25
- Mystic 24
- Pomfret Center 24
- Danielson 23
- East Brooklyn 23
- Moosup 23
- Putnam 23
- South Woodstock 23
- Killingly Center 22
- Pawcatuck 22
- North Grosvenor Dale 21
- Quinebaug 21
- Woodbridge 21
- Bridgeport 20
- Thompson 20
- Old Greenwich 19
- Waterbury 19
- Hartford 18
- New Haven 18
- Newtown 18
- Middletown 17
- Trumbull 17
- Woodbury 16
- Stafford 15
- East Haven 14
- Groton 14
- New London 14
- Fairfield 12
- Hamden 12
- Southington 12
- West Cornwall 12
- West Torrington 12
- East Hartford 11
- Ledyard 11
- Stamford 11
- Montville Center 10
- Redding 10
- Glastonbury 9
- Middlebury 9
- Sherman 9
- Storrs 9
- Tolland 9
- Westport 9
- Windham 9
- Oxford 8
- Winsted 8
- Greenwich 7
- Mansfield City 7
- West Hartford 7
- Branford 5
- Clinton 5
- Enfield 5
- Waterford 5
- Guilford 4
- Norwich 4
- Somers 2
- Hebron 0
- Milford 0
AQI US, Metric