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!
March Air Quality Analysis
Crofton Substation, North Cowichan, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (13th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 33 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Mar - 13th Mar 2026
Crofton Substation, North Cowichan, British Columbia, Canada
7 AM12th Mar 2026
6 PM
6 AM13th Mar 2026
50AQI
34AQI
46AQI
32AQI
In the last 24 hours,
Crofton Substation's AQI reached its highest point of 50 at 10 AM during the Day, while the lowest point, 32, was recorded at 4 AM during the Night between 12th Mar and 13th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Crofton Substation, North Cowichan, British Columbia, Canada
5°C2/9°C
6°C4/10°C
4°C2/7°C
4°C1/7°C
3°C1/5°C
2°C0/5°C
2°C0/6°C
1°C0/5°C
0°C-3/5°C
4°C1/7°C
6°C3/12°C
6°C3/12°C
4°C1/10°C
5°C2/11°C
7°C4/12°C
7°C4/11°C
6°C2/11°C
6°C2/12°C
6°C2/12°C
8°C4/13°C
9°C7/11°C
8°C4/11°C
8°C7/10°C
11°C6/17°C
6°C0/10°C
3°C1/8°C
2°C1/8°C
5°C1/13°C
4°C1/8°C
4°C1/7°C
46AQI
32AQI
39AQI
27AQI
2026 Days Vs Air Quality
Crofton Substation, North Cowichan, British Columbia, Canada
96%
69
4%
3
Total number of days with different AQI categories in last 73 days in 2026 (292 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 73 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
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)
33AQI (US)
31AQI (US)
39AQI (US)
36AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
February39AQI (US)
Lowest AQI (US) recorded in
January31AQI (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
November30AQI (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) (35) shows an average percentage change of 71.09% (worsened AQI (US)) compared to previous years: 2020 (21), 2021 (20), 2022 (20), 2023 (18), 2024 (18), 2025 (27).