Duncan, British Columbia, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Duncan, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Duncan, British Columbia, Canada
7 AM4th Oct 2025
7 PM
6 AM5th Oct 2025
56AQI
38AQI
56AQI
18AQI
In the last 24 hours,
Duncan's AQI reached its highest point of 56 at 7 AM during the Day, while the lowest point, 18, was recorded at 6 AM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Duncan, British Columbia, Canada
--°C/°C
17°C16/19°C
17°C15/19°C
16°C15/18°C
16°C15/18°C
16°C14/20°C
15°C13/17°C
15°C14/17°C
14°C12/17°C
15°C14/19°C
15°C12/17°C
16°C12/19°C
18°C15/21°C
16°C14/19°C
16°C14/18°C
15°C12/21°C
16°C13/21°C
15°C10/21°C
16°C11/24°C
16°C11/22°C
13°C8/19°C
15°C10/22°C
15°C12/20°C
15°C12/20°C
14°C12/16°C
14°C11/19°C
14°C10/19°C
14°C12/19°C
12°C10/15°C
13°C9/17°C
13°C8/19°C
32AQI
27AQI
34AQI
29AQI
2025 Days Vs Air Quality
Duncan, British Columbia, Canada
95%
262
5%
15
Total number of days with different AQI categories in last 279 days in 2025 (86 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 279 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
Duncan, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
29AQI
27AQI
31AQI
22AQI
26AQI
33AQI
41AQI
32AQI
32AQI
27AQI
36AQI
41AQI
40AQI
53AQI
39AQI
35AQI
37AQI
45AQI
45AQI
49AQI
54AQI
57AQI
38AQI
44AQI
48AQI
52AQI
53AQI
57AQI
59AQI
31AQI
21AQI
26AQI
31AQI
22AQI
31AQI
29AQI
32AQI
54AQI
48AQI
36AQI
33AQI
39AQI
41AQI
44AQI
35AQI
24AQI
30AQI
29AQI
21AQI
20AQI
26AQI
24AQI
17AQI
24AQI
18AQI
26AQI
28AQI
34AQI
35AQI
39AQI
31AQI
22AQI
21AQI
22AQI
25AQI
23AQI
35AQI
32AQI
35AQI
28AQI
24AQI
24AQI
21AQI
21AQI
23AQI
21AQI
25AQI
18AQI
20AQI
17AQI
18AQI
22AQI
21AQI
21AQI
17AQI
16AQI
17AQI
22AQI
20AQI
16AQI
25AQI
27AQI
31AQI
32AQI
28AQI
16AQI
14AQI
14AQI
24AQI
17AQI
19AQI
22AQI
29AQI
27AQI
29AQI
22AQI
27AQI
27AQI
20AQI
17AQI
17AQI
23AQI
29AQI
42AQI
37AQI
34AQI
25AQI
21AQI
23AQI
33AQI
32AQI
19AQI
20AQI
24AQI
27AQI
26AQI
21AQI
25AQI
29AQI
21AQI
22AQI
25AQI
19AQI
21AQI
15AQI
17AQI
15AQI
17AQI
11AQI
14AQI
17AQI
15AQI
15AQI
17AQI
17AQI
15AQI
20AQI
14AQI
21AQI
18AQI
16AQI
21AQI
22AQI
19AQI
19AQI
20AQI
21AQI
26AQI
32AQI
32AQI
38AQI
36AQI
30AQI
23AQI
22AQI
20AQI
17AQI
15AQI
16AQI
19AQI
19AQI
19AQI
22AQI
35AQI
26AQI
16AQI
15AQI
14AQI
20AQI
21AQI
23AQI
18AQI
20AQI
19AQI
19AQI
19AQI
20AQI
20AQI
15AQI
18AQI
21AQI
18AQI
22AQI
20AQI
24AQI
36AQI
39AQI
38AQI
25AQI
23AQI
27AQI
25AQI
22AQI
25AQI
17AQI
21AQI
26AQI
30AQI
33AQI
33AQI
27AQI
23AQI
19AQI
25AQI
40AQI
29AQI
41AQI
17AQI
19AQI
28AQI
28AQI
24AQI
24AQI
24AQI
20AQI
21AQI
12AQI
18AQI
21AQI
26AQI
20AQI
27AQI
26AQI
29AQI
36AQI
46AQI
53AQI
53AQI
50AQI
55AQI
39AQI
46AQI
42AQI
39AQI
59AQI
60AQI
57AQI
54AQI
31AQI
32AQI
40AQI
30AQI
35AQI
26AQI
26AQI
34AQI
22AQI
28AQI
45AQI
29AQI
27AQI
27AQI
25AQI
26AQI
32AQI
36AQI
26AQI
29AQI
24AQI
20AQI
23AQI
20AQI
22AQI
23AQI
35AQI
50AQI
40AQI
30AQI
24AQI
24AQI
20AQI
22AQI
24AQI
30AQI
33AQI
33AQI
No. of days
202528AQI
Highest AQI recorded in
January40AQI
Lowest AQI recorded in
May20AQI
202425AQI
Highest AQI recorded in
January35AQI
Lowest AQI recorded in
June16AQI
202326AQI
Highest AQI recorded in
November40AQI
Lowest AQI recorded in
July17AQI
202229AQI
Highest AQI recorded in
November45AQI
Lowest AQI recorded in
June15AQI
202125AQI
Highest AQI recorded in
January34AQI
Lowest AQI recorded in
June18AQI
202029AQI
Highest AQI recorded in
September62AQI
Lowest AQI recorded in
June14AQI
Most & Least Polluted Years Over the Last 6 Years
Duncan's annual 2025 AQI (28) shows an average percentage change of 3.2% (worsened AQI) compared to previous years: 2020 (29), 2021 (25), 2022 (29), 2023 (26), 2024 (25).