Helen Street, Port Alberni, 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
Helen Street, Port Alberni, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 39 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Helen Street, Port Alberni, British Columbia, Canada
7 AM3rd Oct 2025
7 PM
6 AM4th Oct 2025
47AQI
19AQI
59AQI
41AQI
In the last 24 hours,
Helen Street's AQI reached its highest point of 59 at 12 AM during the Night, while the lowest point, 19, was recorded at 3 PM during the Day between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Helen Street, Port Alberni, British Columbia, Canada
--°C/°C
20°C15/26°C
18°C14/24°C
14°C12/16°C
15°C13/16°C
17°C13/21°C
17°C11/22°C
14°C10/19°C
14°C12/17°C
14°C11/17°C
13°C11/14°C
13°C8/18°C
17°C7/26°C
15°C11/18°C
14°C7/21°C
17°C12/22°C
13°C10/15°C
12°C9/15°C
12°C8/18°C
15°C10/23°C
14°C9/21°C
11°C7/15°C
11°C7/14°C
12°C10/15°C
12°C9/16°C
12°C8/15°C
10°C7/14°C
10°C8/13°C
11°C9/13°C
10°C7/12°C
10°C7/15°C
35AQI
32AQI
34AQI
32AQI
2025 Days Vs Air Quality
Helen Street, Port Alberni, British Columbia, Canada
96%
184
4%
8
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 278 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
Helen Street, Port Alberni, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI
21AQI
22AQI
18AQI
26AQI
23AQI
26AQI
31AQI
33AQI
27AQI
37AQI
29AQI
16AQI
16AQI
15AQI
22AQI
20AQI
27AQI
30AQI
31AQI
20AQI
26AQI
21AQI
25AQI
22AQI
21AQI
18AQI
20AQI
25AQI
28AQI
32AQI
35AQI
33AQI
21AQI
17AQI
19AQI
26AQI
30AQI
18AQI
21AQI
18AQI
24AQI
22AQI
22AQI
24AQI
22AQI
19AQI
22AQI
24AQI
22AQI
25AQI
16AQI
16AQI
20AQI
17AQI
13AQI
18AQI
16AQI
16AQI
18AQI
20AQI
19AQI
17AQI
22AQI
18AQI
22AQI
18AQI
18AQI
19AQI
18AQI
19AQI
18AQI
16AQI
23AQI
21AQI
22AQI
28AQI
32AQI
38AQI
30AQI
23AQI
23AQI
18AQI
18AQI
17AQI
17AQI
22AQI
19AQI
19AQI
22AQI
26AQI
27AQI
16AQI
15AQI
14AQI
20AQI
21AQI
22AQI
17AQI
20AQI
20AQI
21AQI
23AQI
22AQI
20AQI
16AQI
18AQI
19AQI
20AQI
18AQI
17AQI
25AQI
33AQI
32AQI
37AQI
31AQI
28AQI
27AQI
26AQI
27AQI
29AQI
23AQI
25AQI
28AQI
29AQI
31AQI
32AQI
29AQI
25AQI
25AQI
26AQI
32AQI
32AQI
33AQI
18AQI
22AQI
28AQI
31AQI
21AQI
24AQI
22AQI
29AQI
28AQI
13AQI
20AQI
22AQI
32AQI
26AQI
29AQI
26AQI
31AQI
43AQI
49AQI
57AQI
57AQI
53AQI
56AQI
46AQI
50AQI
47AQI
42AQI
59AQI
71AQI
65AQI
60AQI
40AQI
32AQI
38AQI
38AQI
39AQI
30AQI
23AQI
28AQI
24AQI
26AQI
42AQI
29AQI
27AQI
26AQI
29AQI
30AQI
35AQI
36AQI
27AQI
25AQI
19AQI
22AQI
15AQI
16AQI
29AQI
36AQI
39AQI
23AQI
25AQI
20AQI
21AQI
25AQI
32AQI
35AQI
35AQI
No. of days
202526AQI
Highest AQI recorded in
September35AQI
Lowest AQI recorded in
May20AQI
Most & Least Polluted Years Over the Last 1 Years
Helen Street's annual 2025 AQI (26) shows an average percentage change of NaN% (improved AQI) compared to previous years: .