Air quality in Connecticut

Air quality index (AQI) and PM2.5 air pollution in Connecticut

Last update at (local time)

LIVE AQI CITY RANKING

Real-time Connecticut
Most polluted city ranking

#cityUS AQI
1 Wauregan

40

2 Shelton

37

3 Torrington

36

4 Ledyard

33

5 Mansfield City

32

6 North Stamford

30

7 Tolland

30

8 Oxford

29

9 Ridgefield

28

10 Waterbury

27

(local time)

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LIVE AQI CITY RANKING

Real-time Connecticut
Cleanest city ranking

#cityUS AQI
1 Guilford

0

2 Hebron

0

3 Clinton

4

4 Northwest Harwinton

4

5 Groton

6

6 Branford

8

7 Westport

8

8 Glastonbury

9

9 Winsted

11

10 Hamden

12

(local time)

SEE WORLD AQI RANKING

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Connecticut air quality data attribution

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