Frelighsburg Site B, Dunham, Quebec, Canada 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
Frelighsburg Site B, Dunham, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 39 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025
Frelighsburg Site B, Dunham, Quebec, Canada
6 AM2nd Oct 2025
6 PM
5 AM3rd Oct 2025
49AQI
28AQI
45AQI
26AQI
In the last 24 hours,
Frelighsburg Site B's AQI reached its highest point of 49 at 12 PM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 2nd Oct and 3rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Frelighsburg Site B, Dunham, Quebec, Canada
20°C13/29°C
21°C13/30°C
20°C14/27°C
15°C12/17°C
14°C10/19°C
14°C7/20°C
15°C2/25°C
18°C9/26°C
15°C7/25°C
13°C3/21°C
16°C9/24°C
18°C13/26°C
17°C9/25°C
16°C5/25°C
19°C12/25°C
20°C11/29°C
14°C11/17°C
10°C2/18°C
14°C3/26°C
20°C12/28°C
18°C16/21°C
19°C15/24°C
18°C17/21°C
19°C16/23°C
17°C11/25°C
20°C15/28°C
18°C10/29°C
16°C11/22°C
11°C5/18°C
11°C2/21°C
--°C/°C
26AQI
24AQI
27AQI
24AQI
2025 Days Vs Air Quality
Frelighsburg Site B, Dunham, Quebec, Canada
86%
164
14%
26
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 276 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
Frelighsburg Site B, Dunham, Quebec, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI
19AQI
17AQI
19AQI
22AQI
17AQI
17AQI
18AQI
17AQI
19AQI
16AQI
18AQI
18AQI
16AQI
24AQI
25AQI
23AQI
21AQI
26AQI
20AQI
13AQI
16AQI
25AQI
27AQI
14AQI
15AQI
15AQI
12AQI
16AQI
19AQI
16AQI
11AQI
18AQI
21AQI
14AQI
20AQI
20AQI
14AQI
18AQI
17AQI
17AQI
17AQI
17AQI
16AQI
15AQI
16AQI
20AQI
26AQI
24AQI
24AQI
27AQI
26AQI
15AQI
12AQI
13AQI
16AQI
12AQI
11AQI
11AQI
14AQI
19AQI
23AQI
23AQI
20AQI
21AQI
23AQI
12AQI
15AQI
25AQI
46AQI
54AQI
54AQI
66AQI
66AQI
59AQI
43AQI
51AQI
60AQI
32AQI
27AQI
29AQI
33AQI
31AQI
24AQI
30AQI
24AQI
35AQI
37AQI
43AQI
49AQI
41AQI
29AQI
25AQI
25AQI
24AQI
29AQI
31AQI
31AQI
42AQI
31AQI
31AQI
41AQI
43AQI
28AQI
30AQI
36AQI
36AQI
42AQI
37AQI
38AQI
54AQI
59AQI
50AQI
23AQI
28AQI
30AQI
35AQI
19AQI
20AQI
30AQI
38AQI
61AQI
63AQI
55AQI
53AQI
59AQI
62AQI
28AQI
37AQI
90AQI
91AQI
64AQI
53AQI
64AQI
72AQI
67AQI
62AQI
57AQI
54AQI
50AQI
51AQI
35AQI
44AQI
41AQI
14AQI
17AQI
17AQI
19AQI
24AQI
29AQI
26AQI
21AQI
15AQI
17AQI
20AQI
18AQI
17AQI
20AQI
25AQI
29AQI
28AQI
24AQI
30AQI
25AQI
20AQI
17AQI
18AQI
23AQI
26AQI
24AQI
28AQI
37AQI
32AQI
31AQI
29AQI
28AQI
19AQI
16AQI
18AQI
20AQI
27AQI
27AQI
19AQI
17AQI
22AQI
32AQI
29AQI
23AQI
27AQI
39AQI
19AQI
18AQI
18AQI
37AQI
40AQI
40AQI
25AQI
33AQI
No. of days
202530AQI
Highest AQI recorded in
July40AQI
Lowest AQI recorded in
April18AQI
Most & Least Polluted Years Over the Last 1 Years
Frelighsburg Site B's annual 2025 AQI (30) shows an average percentage change of NaN% (improved AQI) compared to previous years: .