East Hartford, Connecticut, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
East Hartford, Connecticut, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 42 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
East Hartford, Connecticut, United States
6 AM29th Sep 2025
7 PM
5 AM30th Sep 2025
54AQI
18AQI
47AQI
24AQI
In the last 24 hours,
East Hartford's AQI reached its highest point of 54 at 8 AM during the Day, while the lowest point, 18, was recorded at 4 PM during the Day between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
East Hartford, Connecticut, United States
19°C13/25°C
19°C12/25°C
19°C11/28°C
19°C10/29°C
20°C11/28°C
23°C18/31°C
23°C19/29°C
19°C16/22°C
16°C10/21°C
17°C10/24°C
17°C11/21°C
19°C10/25°C
20°C13/26°C
18°C12/24°C
21°C14/28°C
21°C14/28°C
18°C14/24°C
16°C11/19°C
22°C16/29°C
21°C15/27°C
17°C11/23°C
16°C7/25°C
15°C7/23°C
21°C15/28°C
20°C18/23°C
21°C18/23°C
22°C18/29°C
20°C14/28°C
23°C17/32°C
20°C13/28°C
--°C/°C
33AQI
29AQI
34AQI
32AQI
2025 Days Vs Air Quality
East Hartford, Connecticut, United States
86%
234
14%
37
0.3%
1
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 273 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
East Hartford, Connecticut, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI
20AQI
19AQI
16AQI
18AQI
17AQI
18AQI
16AQI
19AQI
20AQI
24AQI
29AQI
50AQI
24AQI
20AQI
35AQI
58AQI
42AQI
29AQI
20AQI
38AQI
49AQI
54AQI
55AQI
44AQI
43AQI
29AQI
24AQI
24AQI
19AQI
39AQI
21AQI
23AQI
55AQI
26AQI
21AQI
39AQI
33AQI
23AQI
27AQI
38AQI
46AQI
42AQI
23AQI
19AQI
23AQI
21AQI
19AQI
19AQI
19AQI
20AQI
18AQI
25AQI
47AQI
52AQI
40AQI
26AQI
41AQI
21AQI
24AQI
19AQI
22AQI
40AQI
27AQI
19AQI
19AQI
19AQI
21AQI
29AQI
31AQI
21AQI
19AQI
24AQI
22AQI
31AQI
16AQI
16AQI
25AQI
15AQI
14AQI
18AQI
17AQI
21AQI
22AQI
23AQI
17AQI
23AQI
37AQI
29AQI
43AQI
17AQI
18AQI
37AQI
29AQI
18AQI
21AQI
19AQI
22AQI
15AQI
30AQI
23AQI
13AQI
14AQI
21AQI
38AQI
10AQI
14AQI
25AQI
57AQI
18AQI
17AQI
34AQI
19AQI
35AQI
45AQI
32AQI
10AQI
20AQI
27AQI
24AQI
18AQI
40AQI
48AQI
38AQI
18AQI
19AQI
30AQI
21AQI
24AQI
14AQI
27AQI
26AQI
31AQI
29AQI
30AQI
41AQI
38AQI
18AQI
12AQI
12AQI
16AQI
14AQI
13AQI
14AQI
13AQI
19AQI
28AQI
23AQI
22AQI
36AQI
17AQI
14AQI
19AQI
25AQI
37AQI
61AQI
64AQI
49AQI
75AQI
74AQI
33AQI
49AQI
69AQI
66AQI
58AQI
43AQI
39AQI
28AQI
21AQI
24AQI
33AQI
58AQI
58AQI
58AQI
61AQI
53AQI
41AQI
29AQI
27AQI
44AQI
36AQI
48AQI
37AQI
47AQI
46AQI
88AQI
62AQI
55AQI
44AQI
28AQI
33AQI
33AQI
30AQI
20AQI
25AQI
30AQI
33AQI
41AQI
19AQI
29AQI
24AQI
40AQI
23AQI
29AQI
31AQI
44AQI
76AQI
94AQI
73AQI
59AQI
56AQI
63AQI
59AQI
41AQI
60AQI
77AQI
114AQI
76AQI
48AQI
33AQI
37AQI
40AQI
57AQI
60AQI
48AQI
42AQI
61AQI
56AQI
58AQI
24AQI
19AQI
19AQI
18AQI
26AQI
39AQI
29AQI
29AQI
20AQI
22AQI
25AQI
28AQI
18AQI
26AQI
35AQI
36AQI
36AQI
26AQI
38AQI
49AQI
43AQI
23AQI
25AQI
24AQI
33AQI
41AQI
40AQI
44AQI
51AQI
39AQI
23AQI
23AQI
32AQI
22AQI
29AQI
23AQI
29AQI
35AQI
20AQI
22AQI
30AQI
26AQI
42AQI
30AQI
30AQI
23AQI
24AQI
24AQI
45AQI
44AQI
42AQI
32AQI
No. of days
202533AQI
Highest AQI recorded in
June45AQI
Lowest AQI recorded in
March23AQI
202426AQI
Highest AQI recorded in
August36AQI
Lowest AQI recorded in
March19AQI
202331AQI
Highest AQI recorded in
June48AQI
Lowest AQI recorded in
October24AQI
202229AQI
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
August21AQI
202132AQI
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
May25AQI
202031AQI
Highest AQI recorded in
December36AQI
Lowest AQI recorded in
May25AQI
Most & Least Polluted Years Over the Last 6 Years
East Hartford's annual 2025 AQI (33) shows an average percentage change of 9.9% (worsened AQI) compared to previous years: 2020 (31), 2021 (32), 2022 (29), 2023 (31), 2024 (26).