Chester, New Jersey, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Chester, New Jersey, United States
AQI Trends: Highest and Lowest
Same Day Analysis (13th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 27 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Oct - 14th Oct 2025
Chester, New Jersey, United States
6 AM13th Oct 2025
6 PM
5 AM14th Oct 2025
45AQI
26AQI
39AQI
27AQI
In the last 24 hours,
Chester's AQI reached its highest point of 45 at 3 PM during the Day, while the lowest point, 26, was recorded at 7 AM during the Day between 13th Oct and 14th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Chester, New Jersey, United States
22°C17/29°C
21°C15/26°C
19°C15/24°C
18°C14/22°C
22°C17/29°C
22°C17/28°C
17°C13/21°C
16°C10/23°C
15°C9/21°C
21°C13/31°C
21°C17/28°C
22°C20/25°C
21°C17/27°C
20°C14/28°C
22°C16/32°C
20°C14/28°C
20°C13/29°C
16°C10/23°C
13°C7/21°C
14°C6/22°C
19°C10/30°C
21°C13/31°C
20°C12/29°C
21°C14/28°C
17°C10/21°C
11°C6/16°C
8°C2/16°C
12°C7/17°C
14°C12/17°C
12°C11/12°C
--°C/°C
36AQI
33AQI
37AQI
33AQI
2025 Days Vs Air Quality
Chester, New Jersey, United States
84%
168
16%
33
Total number of days with different AQI categories in last 287 days in 2025 (78 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 287 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
Chester, New Jersey, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
20AQI
29AQI
52AQI
49AQI
33AQI
18AQI
22AQI
25AQI
22AQI
17AQI
15AQI
19AQI
20AQI
18AQI
29AQI
27AQI
16AQI
19AQI
25AQI
30AQI
13AQI
21AQI
29AQI
32AQI
20AQI
20AQI
18AQI
22AQI
46AQI
44AQI
27AQI
11AQI
17AQI
30AQI
25AQI
23AQI
33AQI
30AQI
26AQI
18AQI
20AQI
22AQI
26AQI
16AQI
16AQI
30AQI
31AQI
33AQI
23AQI
25AQI
36AQI
31AQI
22AQI
19AQI
15AQI
17AQI
12AQI
12AQI
13AQI
15AQI
21AQI
24AQI
19AQI
19AQI
32AQI
27AQI
18AQI
19AQI
30AQI
55AQI
64AQI
59AQI
56AQI
53AQI
40AQI
33AQI
57AQI
64AQI
69AQI
61AQI
48AQI
40AQI
28AQI
24AQI
30AQI
27AQI
42AQI
46AQI
56AQI
56AQI
51AQI
45AQI
36AQI
28AQI
38AQI
37AQI
32AQI
29AQI
47AQI
49AQI
65AQI
60AQI
54AQI
47AQI
34AQI
35AQI
48AQI
41AQI
31AQI
31AQI
30AQI
43AQI
32AQI
18AQI
26AQI
34AQI
40AQI
39AQI
35AQI
43AQI
51AQI
45AQI
66AQI
44AQI
52AQI
51AQI
55AQI
43AQI
37AQI
49AQI
69AQI
88AQI
77AQI
59AQI
49AQI
45AQI
46AQI
55AQI
52AQI
42AQI
35AQI
57AQI
57AQI
54AQI
24AQI
23AQI
20AQI
15AQI
22AQI
31AQI
30AQI
21AQI
17AQI
19AQI
24AQI
26AQI
17AQI
18AQI
23AQI
26AQI
27AQI
28AQI
36AQI
50AQI
36AQI
19AQI
22AQI
21AQI
26AQI
28AQI
40AQI
42AQI
48AQI
36AQI
28AQI
26AQI
33AQI
24AQI
24AQI
22AQI
30AQI
37AQI
32AQI
19AQI
24AQI
26AQI
39AQI
38AQI
26AQI
29AQI
43AQI
52AQI
58AQI
53AQI
47AQI
22AQI
30AQI
37AQI
39AQI
32AQI
27AQI
37AQI
23AQI
23AQI
44AQI
42AQI
39AQI
30AQI
38AQI
No. of days
202534AQI
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
May23AQI
Most & Least Polluted Years Over the Last 1 Years
Chester's annual 2025 AQI (34) shows an average percentage change of NaN% (improved AQI) compared to previous years: .