Langley, British Columbia, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Langley, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 40 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Langley, British Columbia, Canada
6 AM21st Sep 2025
7 PM
5 AM22nd Sep 2025
40AQI
19AQI
27AQI
22AQI
In the last 24 hours,
Langley's AQI reached its highest point of 40 at 6 AM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Langley, British Columbia, Canada
25°C17/34°C
24°C17/33°C
22°C17/31°C
22°C16/30°C
20°C15/25°C
21°C18/24°C
20°C15/25°C
18°C15/23°C
18°C13/23°C
19°C16/22°C
19°C14/25°C
20°C15/27°C
18°C15/27°C
19°C15/24°C
18°C14/26°C
17°C15/19°C
17°C15/21°C
18°C15/23°C
17°C15/23°C
15°C14/18°C
16°C14/18°C
16°C13/21°C
15°C14/16°C
16°C12/23°C
21°C12/31°C
19°C16/23°C
17°C14/23°C
15°C10/23°C
15°C11/21°C
16°C13/21°C
--°C/°C
41AQI
41AQI
46AQI
42AQI
2025 Days Vs Air Quality
Langley, British Columbia, Canada
96%
254
4%
10
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 265 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
Langley, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
24AQI
24AQI
21AQI
23AQI
26AQI
33AQI
32AQI
29AQI
27AQI
26AQI
29AQI
31AQI
33AQI
37AQI
40AQI
29AQI
30AQI
38AQI
26AQI
48AQI
41AQI
54AQI
43AQI
25AQI
36AQI
38AQI
39AQI
44AQI
56AQI
29AQI
18AQI
21AQI
19AQI
19AQI
21AQI
22AQI
25AQI
50AQI
44AQI
37AQI
22AQI
30AQI
30AQI
28AQI
23AQI
22AQI
27AQI
29AQI
20AQI
19AQI
21AQI
20AQI
17AQI
23AQI
18AQI
21AQI
22AQI
26AQI
30AQI
37AQI
27AQI
22AQI
20AQI
22AQI
23AQI
22AQI
23AQI
23AQI
29AQI
21AQI
19AQI
19AQI
21AQI
19AQI
20AQI
19AQI
22AQI
15AQI
17AQI
17AQI
18AQI
19AQI
20AQI
20AQI
17AQI
15AQI
15AQI
18AQI
16AQI
18AQI
21AQI
22AQI
27AQI
26AQI
26AQI
16AQI
13AQI
14AQI
15AQI
15AQI
17AQI
21AQI
23AQI
22AQI
23AQI
19AQI
23AQI
19AQI
20AQI
16AQI
21AQI
23AQI
30AQI
39AQI
38AQI
38AQI
25AQI
17AQI
20AQI
29AQI
33AQI
14AQI
18AQI
20AQI
19AQI
21AQI
16AQI
21AQI
26AQI
23AQI
20AQI
22AQI
21AQI
22AQI
22AQI
17AQI
14AQI
18AQI
12AQI
14AQI
19AQI
17AQI
21AQI
21AQI
17AQI
16AQI
20AQI
16AQI
19AQI
19AQI
19AQI
21AQI
23AQI
17AQI
20AQI
18AQI
19AQI
22AQI
22AQI
27AQI
29AQI
37AQI
30AQI
23AQI
25AQI
21AQI
19AQI
17AQI
16AQI
19AQI
20AQI
20AQI
25AQI
38AQI
33AQI
23AQI
17AQI
17AQI
20AQI
21AQI
21AQI
19AQI
17AQI
20AQI
26AQI
24AQI
22AQI
19AQI
15AQI
17AQI
22AQI
19AQI
20AQI
18AQI
20AQI
31AQI
37AQI
37AQI
28AQI
26AQI
29AQI
27AQI
28AQI
25AQI
18AQI
23AQI
29AQI
28AQI
31AQI
33AQI
25AQI
20AQI
19AQI
26AQI
41AQI
45AQI
42AQI
18AQI
20AQI
26AQI
29AQI
23AQI
25AQI
20AQI
24AQI
31AQI
13AQI
16AQI
19AQI
23AQI
22AQI
24AQI
26AQI
32AQI
41AQI
47AQI
54AQI
55AQI
55AQI
57AQI
43AQI
46AQI
48AQI
43AQI
70AQI
65AQI
68AQI
64AQI
39AQI
31AQI
45AQI
32AQI
33AQI
24AQI
25AQI
33AQI
22AQI
28AQI
45AQI
26AQI
29AQI
38AQI
40AQI
34AQI
25AQI
21AQI
22AQI
20AQI
23AQI
24AQI
32AQI
40AQI
No. of days
202526AQI
Highest AQI recorded in
September40AQI
Lowest AQI recorded in
May20AQI
202421AQI
Highest AQI recorded in
December28AQI
Lowest AQI recorded in
September17AQI
202323AQI
Highest AQI recorded in
August32AQI
Lowest AQI recorded in
January18AQI
202248AQI
Highest AQI recorded in
January55AQI
Lowest AQI recorded in
December23AQI
202135AQI
Highest AQI recorded in
September55AQI
Lowest AQI recorded in
February18AQI
202027AQI
Highest AQI recorded in
September60AQI
Lowest AQI recorded in
June16AQI
Most & Least Polluted Years Over the Last 6 Years
Langley's annual 2025 AQI (26) shows an average percentage change of -7.01% (improved AQI) compared to previous years: 2020 (27), 2021 (35), 2022 (48), 2023 (23), 2024 (21).