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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 | 57 |
| 2 | Ridgefield | 55 |
| 3 | Bridgeport | 54 |
| 4 | Greenwich | 54 |
| 5 | Hartford | 52 |
| 6 | Waterbury | 52 |
| 7 | Redding | 51 |
| 8 | Stamford | 51 |
| 9 | Woodbury | 50 |
| 10 | Oxford | 49 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
70 Contributors
See all
LIVE AQI CITY RANKING
Real-time Connecticut
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Guilford | 16 |
| 2 | Waterford | 16 |
| 3 | Groton | 18 |
| 4 | New London | 19 |
| 5 | Milford | 24 |
| 6 | Ledyard | 25 |
| 7 | Montville Center | 25 |
| 8 | Southington | 26 |
| 9 | Branford | 28 |
| 10 | Clinton | 30 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Unhealthy for sensitive groups
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News
The latest air quality news and resources.
Connecticut air quality data attribution
70Contributors
Government Contributor
- Clancy Nolan
1 station
- Peter
1 station
- Nibbles
1 station
- The Zs
1 station
- D&S
1 station
5 Individual Contributors
64 Anonymous contributors64 stations
64 Anonymous Contributors
Which is the most polluted city in Connecticut?
- Canaan 60
- Kent 60
- New Hartford Center 60
- North Granby 60
- Salmon Brook 60
- Torrington 60
- Winchester Center 60
- Bethel 59
- Bethlehem Village 59
- Bristol 59
- Canton Valley 59
- Collinsville 59
- Heritage Village 59
- Litchfield 59
- New Fairfield 59
- New Milford 59
- New Preston 59
- Northwest Harwinton 59
- Plymouth 59
- Sherwood Manor 59
- Simsbury Center 59
- Southbury 59
- Suffield Depot 59
- Tariffville 59
- Terryville 59
- Thomaston 59
- Thompsonville 59
- Washington 59
- Watertown 59
- Weatogue 59
- West Simsbury 59
- Woodbury Center 59
- Blue Hills 58
- East Windsor 58
- Farmington 58
- Georgetown 58
- Hazardville 58
- Naugatuck 58
- Oakville 58
- Plainville 58
- Southwood Acres 58
- Wilton 58
- Windsor 58
- Windsor Locks 58
- Wolcott 58
- Byram 57
- Cos Cob 57
- Crystal Lake 57
- Easton 57
- Ellington 57
- Glenville 57
- Kensington 57
- New Britain 57
- New Canaan 57
- Newington 57
- Pemberwick 57
- Prospect 57
- Riverside 57
- Seymour 57
- South Windsor 57
- Stafford Springs 57
- Wauregan 57
- Wethersfield 57
- Ansonia 56
- Cheshire 56
- Cheshire Village 56
- Darien 56
- Derby 56
- East Norwalk 56
- Glastonbury Center 56
- Manchester 56
- Meriden 56
- Norwalk 56
- Rockville 56
- Coventry Lake 55
- Cromwell 55
- Portland 55
- Ridgefield 55
- South Coventry 55
- Southport 55
- Wallingford 55
- Bridgeport 54
- City of Milford (balance) 54
- Greenwich 54
- Lake Pocotopaug 54
- North Grosvenor Dale 54
- North Haven 54
- Orange 54
- Quinebaug 54
- South Woodstock 54
- Terramuggus 54
- Wallingford Center 54
- Durham 53
- East Hampton 53
- Higganum 53
- Putnam 53
- Stratford 53
- Thompson 53
- West Haven 53
- Willimantic 53
- Woodmont 53
- Branford Center 52
- Hartford 52
- Killingly Center 52
- South Windham 52
- Waterbury 52
- Colchester 51
- Danielson 51
- East Brooklyn 51
- North Branford 51
- Redding 51
- Stamford 51
- Moodus 50
- Woodbury 50
- Oxford 49
- Storrs 49
- East Hartford 48
- Stafford 48
- East Haddam 47
- Glastonbury 47
- Middletown 47
- Trumbull 47
- Moosup 46
- Baltic 45
- East Haven 45
- Guilford Center 45
- Middlebury 44
- North Stamford 44
- Old Greenwich 44
- Plainfield 44
- Plainfield Village 44
- West Torrington 44
- Newtown 43
- Shelton 43
- West Cornwall 43
- Chester Center 42
- Lisbon 42
- Salem 42
- Tolland 42
- Enfield 41
- Jewett City 41
- Madison Center 41
- Deep River Center 40
- Fairfield 40
- New Haven 40
- Windham 40
- Hamden 39
- Madison 39
- Mansfield City 39
- Sherman 39
- Woodbridge 39
- Danbury 38
- Essex Village 38
- Pomfret Center 38
- Winsted 38
- Norwich 37
- Somers 37
- Westbrook Center 36
- Westport 36
- Old Saybrook 35
- Old Saybrook Center 35
- Oxoboxo River 35
- Preston City 35
- Saybrook Manor 35
- West Hartford 35
- Old Lyme 34
- Uncasville 34
- Gales Ferry 33
- Niantic 33
- Central Waterford 30
- Clinton 30
- Conning Towers-Nautilus Park 30
- Long Hill 30
- Old Mystic 29
- Branford 28
- Poquonock Bridge 28
- Mystic 27
- Noank 27
- Pawcatuck 26
- Southington 26
- Ledyard 25
- Montville Center 25
- Milford 24
- New London 19
- Groton 18
- Guilford 16
- Waterford 16
- Hebron 5
AQI US, Metric