Belleville, Ontario, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Belleville, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (18th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 15 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Aug - 20th Aug 2025
Belleville, Ontario, Canada
6 AM19th Aug 2025
8 PM
5 AM20th Aug 2025
23AQI
16AQI
20AQI
18AQI
In the last 24 hours,
Belleville's AQI reached its highest point of 23 at 5 PM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 19th Aug and 20th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Belleville, Ontario, Canada
19°C13/26°C
18°C10/24°C
19°C8/29°C
25°C16/33°C
26°C23/31°C
25°C18/30°C
27°C21/33°C
26°C19/34°C
26°C20/34°C
24°C18/31°C
21°C18/25°C
19°C11/27°C
20°C9/30°C
23°C14/32°C
22°C13/32°C
24°C16/32°C
24°C15/33°C
24°C19/32°C
24°C17/32°C
25°C18/33°C
27°C19/35°C
26°C18/34°C
26°C19/35°C
26°C21/34°C
25°C18/33°C
23°C14/32°C
24°C15/35°C
20°C14/25°C
17°C9/24°C
17°C12/22°C
--°C/°C
47AQI
47AQI
49AQI
49AQI
2025 Days Vs Air Quality
Belleville, Ontario, Canada
87%
200
13%
30
Total number of days with different AQI categories in last 232 days in 2025 (133 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 232 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
Belleville, Ontario, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
22AQI
22AQI
27AQI
27AQI
23AQI
23AQI
25AQI
26AQI
28AQI
29AQI
54AQI
34AQI
26AQI
22AQI
32AQI
49AQI
27AQI
24AQI
25AQI
26AQI
26AQI
33AQI
39AQI
44AQI
34AQI
29AQI
30AQI
27AQI
26AQI
38AQI
28AQI
26AQI
43AQI
23AQI
24AQI
28AQI
28AQI
29AQI
27AQI
29AQI
30AQI
27AQI
25AQI
28AQI
30AQI
27AQI
27AQI
28AQI
22AQI
21AQI
27AQI
36AQI
55AQI
50AQI
56AQI
32AQI
29AQI
28AQI
29AQI
27AQI
29AQI
35AQI
32AQI
24AQI
31AQI
31AQI
30AQI
30AQI
30AQI
28AQI
27AQI
50AQI
52AQI
29AQI
15AQI
19AQI
23AQI
22AQI
15AQI
17AQI
17AQI
20AQI
19AQI
19AQI
19AQI
19AQI
18AQI
23AQI
23AQI
16AQI
17AQI
23AQI
17AQI
18AQI
17AQI
17AQI
15AQI
17AQI
27AQI
25AQI
33AQI
22AQI
23AQI
22AQI
14AQI
16AQI
25AQI
45AQI
16AQI
17AQI
19AQI
14AQI
22AQI
29AQI
26AQI
14AQI
17AQI
27AQI
15AQI
17AQI
25AQI
15AQI
18AQI
17AQI
16AQI
21AQI
15AQI
18AQI
19AQI
19AQI
22AQI
31AQI
24AQI
22AQI
28AQI
30AQI
17AQI
13AQI
12AQI
16AQI
16AQI
11AQI
12AQI
14AQI
18AQI
24AQI
27AQI
20AQI
35AQI
22AQI
12AQI
17AQI
26AQI
50AQI
44AQI
56AQI
59AQI
69AQI
51AQI
35AQI
52AQI
63AQI
31AQI
26AQI
30AQI
34AQI
25AQI
29AQI
31AQI
28AQI
52AQI
54AQI
52AQI
54AQI
40AQI
31AQI
28AQI
26AQI
27AQI
29AQI
33AQI
28AQI
43AQI
31AQI
37AQI
49AQI
48AQI
27AQI
31AQI
46AQI
47AQI
48AQI
36AQI
44AQI
52AQI
58AQI
38AQI
21AQI
23AQI
24AQI
37AQI
19AQI
20AQI
33AQI
31AQI
53AQI
49AQI
53AQI
46AQI
55AQI
66AQI
31AQI
29AQI
67AQI
92AQI
80AQI
60AQI
73AQI
75AQI
67AQI
63AQI
53AQI
52AQI
39AQI
41AQI
36AQI
47AQI
39AQI
15AQI
30AQI
31AQI
26AQI
21AQI
20AQI
39AQI
40AQI
53AQI
No. of days
202531AQI
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
May20AQI
202428AQI
Highest AQI recorded in
August33AQI
Lowest AQI recorded in
November18AQI
202337AQI
Highest AQI recorded in
June76AQI
Lowest AQI recorded in
October25AQI
202230AQI
Highest AQI recorded in
February34AQI
Lowest AQI recorded in
August20AQI
202131AQI
Highest AQI recorded in
August38AQI
Lowest AQI recorded in
October24AQI
202032AQI
Highest AQI recorded in
July38AQI
Lowest AQI recorded in
October26AQI
Most & Least Polluted Years Over the Last 6 Years
Belleville's annual 2025 AQI (31) shows an average percentage change of -0.8% (improved AQI) compared to previous years: 2020 (32), 2021 (31), 2022 (30), 2023 (37), 2024 (28).