North Cowichan, British Columbia, 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
North Cowichan, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 25 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Aug - 5th Aug 2025
North Cowichan, British Columbia, Canada
5 AM4th Aug 2025
9 PM
4 AM5th Aug 2025
47AQI
36AQI
42AQI
35AQI
In the last 24 hours,
North Cowichan's AQI reached its highest point of 47 at 8 PM during the Day, while the lowest point, undefined, was recorded at 4 AM during the Night between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
North Cowichan, British Columbia, Canada
19°C15/22°C
21°C17/24°C
19°C17/23°C
18°C16/20°C
17°C15/20°C
20°C16/23°C
21°C18/25°C
23°C20/28°C
21°C17/24°C
23°C18/28°C
23°C19/26°C
22°C18/27°C
19°C17/21°C
16°C14/16°C
17°C14/20°C
19°C16/23°C
17°C16/19°C
19°C16/21°C
18°C16/20°C
16°C15/18°C
17°C15/19°C
17°C13/20°C
17°C14/21°C
21°C16/26°C
23°C19/27°C
22°C19/24°C
20°C17/23°C
18°C16/20°C
17°C14/20°C
17°C14/20°C
--°C/°C
25AQI
24AQI
26AQI
26AQI
2025 Days Vs Air Quality
North Cowichan, British Columbia, Canada
96%
207
4%
8
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 217 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
North Cowichan, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
29AQI
26AQI
29AQI
22AQI
24AQI
36AQI
38AQI
34AQI
31AQI
24AQI
32AQI
37AQI
39AQI
54AQI
43AQI
30AQI
37AQI
40AQI
40AQI
47AQI
51AQI
52AQI
37AQI
41AQI
47AQI
52AQI
54AQI
59AQI
51AQI
32AQI
20AQI
24AQI
30AQI
27AQI
29AQI
28AQI
29AQI
61AQI
50AQI
46AQI
29AQI
37AQI
34AQI
45AQI
42AQI
25AQI
29AQI
31AQI
22AQI
19AQI
31AQI
28AQI
17AQI
25AQI
18AQI
28AQI
27AQI
37AQI
36AQI
37AQI
28AQI
20AQI
20AQI
22AQI
21AQI
22AQI
34AQI
32AQI
35AQI
28AQI
24AQI
24AQI
22AQI
20AQI
25AQI
20AQI
25AQI
18AQI
19AQI
16AQI
16AQI
22AQI
22AQI
24AQI
17AQI
16AQI
15AQI
18AQI
22AQI
17AQI
20AQI
24AQI
25AQI
24AQI
25AQI
14AQI
15AQI
14AQI
18AQI
17AQI
18AQI
22AQI
20AQI
19AQI
20AQI
18AQI
21AQI
20AQI
18AQI
16AQI
15AQI
18AQI
22AQI
30AQI
30AQI
29AQI
21AQI
17AQI
19AQI
24AQI
29AQI
19AQI
16AQI
19AQI
22AQI
23AQI
17AQI
19AQI
22AQI
18AQI
19AQI
21AQI
17AQI
17AQI
15AQI
16AQI
13AQI
14AQI
12AQI
13AQI
16AQI
16AQI
14AQI
16AQI
17AQI
15AQI
20AQI
14AQI
17AQI
16AQI
15AQI
18AQI
20AQI
17AQI
21AQI
18AQI
18AQI
23AQI
23AQI
25AQI
34AQI
30AQI
25AQI
21AQI
19AQI
19AQI
17AQI
15AQI
17AQI
18AQI
19AQI
19AQI
22AQI
35AQI
27AQI
18AQI
16AQI
15AQI
20AQI
22AQI
23AQI
18AQI
17AQI
20AQI
20AQI
20AQI
23AQI
21AQI
16AQI
17AQI
21AQI
19AQI
22AQI
19AQI
23AQI
34AQI
38AQI
37AQI
26AQI
24AQI
26AQI
24AQI
23AQI
25AQI
18AQI
21AQI
25AQI
28AQI
31AQI
32AQI
25AQI
22AQI
19AQI
25AQI
39AQI
31AQI
23AQI
20AQI
18AQI
21AQI
24AQI
22AQI
No. of days
202525AQI
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
May18AQI
202418AQI
Highest AQI recorded in
December29AQI
Lowest AQI recorded in
April10AQI
202318AQI
Highest AQI recorded in
November27AQI
Lowest AQI recorded in
April12AQI
202220AQI
Highest AQI recorded in
November30AQI
Lowest AQI recorded in
June12AQI
202120AQI
Highest AQI recorded in
August25AQI
Lowest AQI recorded in
February15AQI
202021AQI
Highest AQI recorded in
September59AQI
Lowest AQI recorded in
December13AQI
Most & Least Polluted Years Over the Last 6 Years
North Cowichan's annual 2025 AQI (25) shows an average percentage change of 27.8% (worsened AQI) compared to previous years: 2020 (21), 2021 (20), 2022 (20), 2023 (18), 2024 (18).