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