Porthill, Creston, 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
Porthill, Creston, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 28 of Good air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025
Porthill, Creston, British Columbia, Canada
6 AM2nd Oct 2025
6 PM
5 AM3rd Oct 2025
38AQI
6AQI
52AQI
26AQI
In the last 24 hours,
Porthill's AQI reached its highest point of 52 at 8 PM during the Night, while the lowest point, 6, was recorded at 3 PM during the Day between 2nd Oct and 3rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Porthill, Creston, British Columbia, Canada
25°C15/36°C
21°C15/29°C
19°C9/28°C
22°C12/31°C
21°C13/29°C
19°C11/27°C
18°C11/27°C
19°C10/29°C
19°C11/29°C
19°C12/26°C
18°C10/25°C
17°C10/24°C
15°C11/19°C
15°C9/26°C
18°C9/28°C
19°C11/28°C
20°C11/29°C
19°C10/28°C
17°C7/22°C
14°C8/22°C
16°C7/26°C
19°C9/28°C
20°C12/29°C
17°C12/24°C
16°C11/25°C
16°C8/26°C
17°C9/27°C
15°C12/20°C
13°C9/20°C
14°C9/20°C
--°C/°C
60AQI
53AQI
63AQI
57AQI
2025 Days Vs Air Quality
Porthill, Creston, British Columbia, Canada
92%
253
7%
19
1%
3
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 276 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
Porthill, Creston, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
38AQI
35AQI
29AQI
28AQI
30AQI
26AQI
33AQI
30AQI
28AQI
30AQI
28AQI
33AQI
34AQI
34AQI
41AQI
32AQI
29AQI
30AQI
31AQI
29AQI
32AQI
43AQI
39AQI
44AQI
33AQI
38AQI
40AQI
47AQI
48AQI
54AQI
48AQI
24AQI
26AQI
24AQI
22AQI
23AQI
31AQI
33AQI
34AQI
38AQI
36AQI
28AQI
33AQI
34AQI
34AQI
22AQI
30AQI
35AQI
37AQI
29AQI
24AQI
25AQI
23AQI
21AQI
20AQI
20AQI
23AQI
26AQI
31AQI
34AQI
35AQI
36AQI
25AQI
22AQI
28AQI
28AQI
25AQI
24AQI
18AQI
23AQI
20AQI
20AQI
20AQI
22AQI
18AQI
20AQI
21AQI
22AQI
20AQI
18AQI
18AQI
19AQI
18AQI
22AQI
23AQI
23AQI
20AQI
15AQI
21AQI
25AQI
16AQI
20AQI
21AQI
28AQI
27AQI
28AQI
35AQI
15AQI
13AQI
18AQI
23AQI
19AQI
16AQI
18AQI
22AQI
29AQI
18AQI
18AQI
20AQI
15AQI
14AQI
14AQI
17AQI
17AQI
30AQI
22AQI
29AQI
24AQI
20AQI
21AQI
17AQI
23AQI
26AQI
14AQI
15AQI
15AQI
20AQI
16AQI
19AQI
22AQI
19AQI
15AQI
15AQI
18AQI
17AQI
15AQI
14AQI
13AQI
13AQI
12AQI
13AQI
13AQI
15AQI
15AQI
18AQI
21AQI
16AQI
15AQI
23AQI
16AQI
19AQI
22AQI
13AQI
18AQI
16AQI
22AQI
23AQI
19AQI
23AQI
28AQI
27AQI
33AQI
36AQI
28AQI
21AQI
20AQI
21AQI
25AQI
26AQI
21AQI
25AQI
17AQI
15AQI
20AQI
32AQI
33AQI
25AQI
20AQI
18AQI
17AQI
18AQI
22AQI
27AQI
24AQI
21AQI
24AQI
23AQI
21AQI
22AQI
24AQI
21AQI
19AQI
23AQI
22AQI
23AQI
20AQI
24AQI
28AQI
29AQI
27AQI
25AQI
22AQI
24AQI
25AQI
28AQI
27AQI
21AQI
22AQI
22AQI
23AQI
24AQI
32AQI
44AQI
48AQI
40AQI
43AQI
33AQI
41AQI
31AQI
21AQI
21AQI
24AQI
25AQI
26AQI
34AQI
38AQI
43AQI
31AQI
18AQI
21AQI
22AQI
30AQI
23AQI
28AQI
38AQI
40AQI
43AQI
50AQI
55AQI
59AQI
58AQI
48AQI
61AQI
62AQI
66AQI
79AQI
71AQI
106AQI
124AQI
108AQI
80AQI
65AQI
61AQI
58AQI
63AQI
69AQI
67AQI
41AQI
35AQI
50AQI
47AQI
45AQI
48AQI
51AQI
29AQI
35AQI
31AQI
39AQI
47AQI
40AQI
81AQI
80AQI
41AQI
24AQI
28AQI
35AQI
28AQI
23AQI
21AQI
17AQI
23AQI
24AQI
37AQI
61AQI
26AQI
No. of days
202530AQI
Highest AQI recorded in
September61AQI
Lowest AQI recorded in
May17AQI
202428AQI
Highest AQI recorded in
July39AQI
Lowest AQI recorded in
May11AQI
202332AQI
Highest AQI recorded in
August54AQI
Lowest AQI recorded in
September25AQI
202238AQI
Highest AQI recorded in
September67AQI
Lowest AQI recorded in
May22AQI
202136AQI
Highest AQI recorded in
July71AQI
Lowest AQI recorded in
April22AQI
202033AQI
Highest AQI recorded in
September78AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 6 Years
Porthill's annual 2025 AQI (30) shows an average percentage change of -9.9% (improved AQI) compared to previous years: 2020 (33), 2021 (36), 2022 (38), 2023 (32), 2024 (28).