Crofton Substation, 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
Crofton Substation, North Cowichan, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (17th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 48 of Good air quality on the same day.
Day & Night AQI Trend: 17th Aug - 18th Aug 2026
Crofton Substation, North Cowichan, British Columbia, Canada
5 AM17th Aug 2026
8 PM
4 AM18th Aug 2026
65AQI
36AQI
69AQI
42AQI
In the last 24 hours,
Crofton Substation's AQI reached its highest point of 69 at 5 AM during the Night, while the lowest point, 36, was recorded at 11 AM during the Day between 17th Aug and 18th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Crofton Substation, North Cowichan, British Columbia, Canada
24°C15/32°C
27°C18/34°C
28°C19/34°C
26°C21/31°C
22°C16/27°C
19°C16/22°C
17°C16/20°C
17°C14/21°C
18°C14/24°C
18°C11/25°C
20°C13/27°C
21°C13/28°C
19°C17/22°C
18°C11/25°C
19°C11/27°C
22°C14/29°C
22°C14/29°C
23°C14/30°C
23°C15/31°C
22°C16/28°C
21°C14/27°C
20°C13/26°C
20°C14/26°C
22°C15/30°C
22°C15/29°C
21°C15/28°C
19°C14/23°C
20°C13/28°C
21°C14/27°C
21°C15/27°C
69AQI
49AQI
60AQI
49AQI
2026 Days Vs Air Quality
Crofton Substation, North Cowichan, British Columbia, Canada
89%
201
11%
25
Total number of days with different AQI categories in last 230 days in 2026 (135 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2026, 89% of 230 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
Crofton Substation, North Cowichan, British Columbia, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
40AQI (US)
44AQI (US)
26AQI (US)
13AQI (US)
19AQI (US)
14AQI (US)
12AQI (US)
15AQI (US)
19AQI (US)
35AQI (US)
19AQI (US)
15AQI (US)
12AQI (US)
15AQI (US)
15AQI (US)
21AQI (US)
28AQI (US)
35AQI (US)
30AQI (US)
33AQI (US)
45AQI (US)
47AQI (US)
54AQI (US)
51AQI (US)
46AQI (US)
43AQI (US)
41AQI (US)
46AQI (US)
52AQI (US)
45AQI (US)
44AQI (US)
50AQI (US)
48AQI (US)
49AQI (US)
48AQI (US)
47AQI (US)
39AQI (US)
40AQI (US)
45AQI (US)
42AQI (US)
47AQI (US)
43AQI (US)
20AQI (US)
42AQI (US)
39AQI (US)
41AQI (US)
38AQI (US)
44AQI (US)
33AQI (US)
37AQI (US)
18AQI (US)
35AQI (US)
35AQI (US)
35AQI (US)
38AQI (US)
29AQI (US)
34AQI (US)
33AQI (US)
37AQI (US)
37AQI (US)
30AQI (US)
17AQI (US)
45AQI (US)
37AQI (US)
33AQI (US)
43AQI (US)
34AQI (US)
38AQI (US)
35AQI (US)
41AQI (US)
40AQI (US)
34AQI (US)
36AQI (US)
35AQI (US)
36AQI (US)
35AQI (US)
32AQI (US)
33AQI (US)
40AQI (US)
37AQI (US)
36AQI (US)
28AQI (US)
35AQI (US)
33AQI (US)
24AQI (US)
27AQI (US)
30AQI (US)
26AQI (US)
21AQI (US)
16AQI (US)
27AQI (US)
34AQI (US)
25AQI (US)
29AQI (US)
27AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
19AQI (US)
35AQI (US)
35AQI (US)
35AQI (US)
28AQI (US)
30AQI (US)
30AQI (US)
24AQI (US)
17AQI (US)
17AQI (US)
24AQI (US)
20AQI (US)
19AQI (US)
15AQI (US)
15AQI (US)
18AQI (US)
26AQI (US)
22AQI (US)
14AQI (US)
16AQI (US)
26AQI (US)
24AQI (US)
16AQI (US)
14AQI (US)
19AQI (US)
25AQI (US)
22AQI (US)
20AQI (US)
16AQI (US)
22AQI (US)
44AQI (US)
51AQI (US)
57AQI (US)
47AQI (US)
45AQI (US)
46AQI (US)
38AQI (US)
45AQI (US)
41AQI (US)
40AQI (US)
39AQI (US)
27AQI (US)
19AQI (US)
21AQI (US)
17AQI (US)
18AQI (US)
20AQI (US)
25AQI (US)
21AQI (US)
15AQI (US)
22AQI (US)
25AQI (US)
25AQI (US)
24AQI (US)
25AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
21AQI (US)
21AQI (US)
16AQI (US)
12AQI (US)
24AQI (US)
20AQI (US)
13AQI (US)
13AQI (US)
16AQI (US)
16AQI (US)
14AQI (US)
15AQI (US)
16AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
25AQI (US)
26AQI (US)
21AQI (US)
25AQI (US)
28AQI (US)
25AQI (US)
22AQI (US)
17AQI (US)
15AQI (US)
27AQI (US)
16AQI (US)
28AQI (US)
30AQI (US)
29AQI (US)
24AQI (US)
16AQI (US)
16AQI (US)
14AQI (US)
45AQI (US)
39AQI (US)
43AQI (US)
41AQI (US)
56AQI (US)
63AQI (US)
53AQI (US)
59AQI (US)
85AQI (US)
90AQI (US)
86AQI (US)
70AQI (US)
40AQI (US)
72AQI (US)
55AQI (US)
57AQI (US)
55AQI (US)
59AQI (US)
45AQI (US)
55AQI (US)
56AQI (US)
50AQI (US)
47AQI (US)
56AQI (US)
45AQI (US)
66AQI (US)
65AQI (US)
46AQI (US)
48AQI (US)
59AQI (US)
53AQI (US)
48AQI (US)
31AQI (US)
39AQI (US)
33AQI (US)
25AQI (US)
29AQI (US)
21AQI (US)
40AQI (US)
54AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
August54AQI (US)
Lowest AQI (US) recorded in
June21AQI (US)
202527AQI (US)
Highest AQI (US) recorded in
January39AQI (US)
Lowest AQI (US) recorded in
May18AQI (US)
202418AQI (US)
Highest AQI (US) recorded in
December29AQI (US)
Lowest AQI (US) recorded in
April10AQI (US)
202318AQI (US)
Highest AQI (US) recorded in
November27AQI (US)
Lowest AQI (US) recorded in
April12AQI (US)
202220AQI (US)
Highest AQI (US) recorded in
August30AQI (US)
Lowest AQI (US) recorded in
June12AQI (US)
202120AQI (US)
Highest AQI (US) recorded in
August25AQI (US)
Lowest AQI (US) recorded in
February15AQI (US)
202021AQI (US)
Highest AQI (US) recorded in
September59AQI (US)
Lowest AQI (US) recorded in
December13AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Crofton Substation's annual 2026 AQI (US) (33) shows an average percentage change of 62.6% (worsened AQI (US)) compared to previous years: 2020 (21), 2021 (20), 2022 (20), 2023 (18), 2024 (18), 2025 (27).