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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 |  Pomfret Center | 33 |
| 2 | New Haven | 29 |
| 3 | Wauregan | 29 |
| 4 | Stafford | 19 |
| 5 | Middletown | 17 |
| 6 | Hartford | 16 |
| 7 | West Cornwall | 16 |
| 8 | West Torrington | 16 |
| 9 | Windham | 13 |
| 10 | Tolland | 11 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
65 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Middlebury | 0 |
| 2 | North Stamford | 0 |
| 3 | Waterford | 0 |
| 4 | Clinton | 1 |
| 5 | Ledyard | 1 |
| 6 | Milford | 1 |
| 7 | Montville Center | 1 |
| 8 | Norwich | 1 |
| 9 | Oxford | 1 |
| 10 | Westport | 2 |
(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
65Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
59 Anonymous contributors59 stations
59 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Pomfret Center 33
- Stratford 30
- New Haven 29
- Wauregan 29
- Killingly Center 25
- North Grosvenor Dale 25
- Putnam 25
- Quinebaug 25
- South Woodstock 25
- Thompson 25
- Crystal Lake 24
- Danielson 24
- East Brooklyn 24
- East Windsor 24
- Ellington 24
- Hazardville 24
- Sherwood Manor 24
- Southwood Acres 24
- Stafford Springs 24
- Suffield Depot 24
- Thompsonville 24
- Coventry Lake 23
- Moosup 23
- North Granby 23
- Plainfield 23
- Plainfield Village 23
- Rockville 23
- Salmon Brook 23
- South Coventry 23
- South Windham 23
- Willimantic 23
- Windsor 23
- Windsor Locks 23
- Baltic 22
- Blue Hills 22
- Hebron 22
- Lisbon 22
- Manchester 22
- South Windsor 22
- Tariffville 22
- Colchester 21
- Glastonbury Center 21
- Jewett City 21
- Simsbury Center 21
- Terramuggus 21
- Weatogue 21
- West Simsbury 21
- Wethersfield 21
- Canton Valley 20
- Central Waterford 20
- Chester Center 20
- Collinsville 20
- Conning Towers-Nautilus Park 20
- Cromwell 20
- Deep River Center 20
- East Haddam 20
- East Hampton 20
- Essex Village 20
- Farmington 20
- Gales Ferry 20
- Higganum 20
- Kensington 20
- Lake Pocotopaug 20
- Long Hill 20
- Moodus 20
- Mystic 20
- New Britain 20
- New Hartford Center 20
- Newington 20
- Niantic 20
- Noank 20
- Old Mystic 20
- Old Saybrook 20
- Old Saybrook Center 20
- Oxoboxo River 20
- Pawcatuck 20
- Plainville 20
- Poquonock Bridge 20
- Portland 20
- Preston City 20
- Salem 20
- Saybrook Manor 20
- Uncasville 20
- Westbrook Center 20
- Bristol 19
- Canaan 19
- Cheshire 19
- Cheshire Village 19
- Durham 19
- Guilford Center 19
- Litchfield 19
- Madison 19
- Madison Center 19
- Meriden 19
- North Haven 19
- Northwest Harwinton 19
- Oakville 19
- Plymouth 19
- Prospect 19
- Stafford 19
- Terryville 19
- Thomaston 19
- Torrington 19
- Wallingford 19
- Wallingford Center 19
- Winchester Center 19
- Wolcott 19
- Bethlehem Village 18
- Branford Center 18
- Kent 18
- Naugatuck 18
- New Preston 18
- North Branford 18
- Orange 18
- Seymour 18
- Southbury 18
- Washington 18
- Watertown 18
- West Haven 18
- Woodbury Center 18
- Ansonia 17
- Bethel 17
- Byram 17
- City of Milford (balance) 17
- Cos Cob 17
- Darien 17
- Derby 17
- East Norwalk 17
- Easton 17
- Georgetown 17
- Glenville 17
- Heritage Village 17
- Middletown 17
- New Canaan 17
- New Fairfield 17
- New Milford 17
- Norwalk 17
- Pemberwick 17
- Riverside 17
- Southport 17
- Wilton 17
- Woodmont 17
- Hartford 16
- West Cornwall 16
- West Torrington 16
- Windham 13
- Tolland 11
- Stamford 10
- Waterbury 10
- Woodbury 10
- Bridgeport 8
- Mansfield City 8
- Old Greenwich 8
- Winsted 8
- East Hartford 7
- Glastonbury 7
- Newtown 7
- Trumbull 7
- Woodbridge 7
- East Haven 6
- Somers 6
- Southington 6
- Danbury 5
- Enfield 5
- Groton 5
- New London 5
- Old Lyme 5
- Ridgefield 5
- Sherman 5
- Storrs 5
- Greenwich 4
- Guilford 4
- Hamden 4
- Redding 4
- Shelton 4
- West Hartford 4
- Branford 3
- Fairfield 3
- Westport 2
- Clinton 1
- Ledyard 1
- Milford 1
- Montville Center 1
- Norwich 1
- Oxford 1
- Middlebury 0
- North Stamford 0
- Waterford 0
AQI US, Metric