Cape Breton, Nova Scotia, 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
Cape Breton, Nova Scotia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (28th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 18 of Good air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 28th Sep - 29th Sep 2025
Cape Breton, Nova Scotia, Canada
6 AM28th Sep 2025
7 PM
5 AM29th Sep 2025
29AQI
11AQI
25AQI
17AQI
In the last 24 hours,
Cape Breton's AQI reached its highest point of 29 at 4 PM during the Day, while the lowest point, 11, was recorded at 1 PM during the Day between 28th Sep and 29th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Cape Breton, Nova Scotia, Canada
17°C15/20°C
18°C16/22°C
16°C13/20°C
16°C8/21°C
17°C12/24°C
17°C10/25°C
18°C11/24°C
21°C17/28°C
22°C19/29°C
19°C16/22°C
16°C12/20°C
15°C7/20°C
15°C14/16°C
15°C10/18°C
15°C13/18°C
16°C13/19°C
16°C10/20°C
15°C9/21°C
16°C7/23°C
17°C14/23°C
17°C12/20°C
11°C9/13°C
13°C5/18°C
15°C8/22°C
16°C11/23°C
15°C11/18°C
12°C4/19°C
18°C13/22°C
16°C11/21°C
14°C5/22°C
--°C/°C
18AQI
17AQI
18AQI
17AQI
2025 Days Vs Air Quality
Cape Breton, Nova Scotia, Canada
100%
270
0.3%
1
Total number of days with different AQI categories in last 272 days in 2025 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 272 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
Cape Breton, Nova Scotia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
28AQI
18AQI
18AQI
21AQI
20AQI
20AQI
19AQI
19AQI
21AQI
22AQI
25AQI
25AQI
25AQI
19AQI
20AQI
33AQI
23AQI
21AQI
18AQI
21AQI
22AQI
23AQI
22AQI
23AQI
26AQI
21AQI
26AQI
19AQI
18AQI
21AQI
17AQI
18AQI
20AQI
18AQI
18AQI
21AQI
20AQI
22AQI
22AQI
23AQI
24AQI
25AQI
27AQI
19AQI
18AQI
18AQI
18AQI
18AQI
18AQI
22AQI
19AQI
21AQI
22AQI
25AQI
27AQI
25AQI
20AQI
22AQI
22AQI
21AQI
22AQI
22AQI
30AQI
19AQI
19AQI
19AQI
18AQI
20AQI
22AQI
21AQI
21AQI
23AQI
22AQI
20AQI
21AQI
20AQI
22AQI
16AQI
14AQI
16AQI
22AQI
20AQI
20AQI
21AQI
17AQI
18AQI
18AQI
19AQI
18AQI
16AQI
20AQI
21AQI
18AQI
18AQI
15AQI
15AQI
17AQI
17AQI
17AQI
16AQI
23AQI
20AQI
19AQI
14AQI
15AQI
17AQI
15AQI
17AQI
30AQI
22AQI
17AQI
14AQI
15AQI
19AQI
18AQI
13AQI
16AQI
29AQI
27AQI
18AQI
21AQI
19AQI
22AQI
15AQI
20AQI
21AQI
15AQI
19AQI
14AQI
13AQI
17AQI
18AQI
21AQI
30AQI
27AQI
31AQI
20AQI
14AQI
16AQI
17AQI
16AQI
16AQI
13AQI
17AQI
19AQI
20AQI
25AQI
30AQI
17AQI
17AQI
23AQI
22AQI
20AQI
19AQI
19AQI
21AQI
33AQI
29AQI
36AQI
28AQI
25AQI
47AQI
35AQI
20AQI
20AQI
22AQI
24AQI
17AQI
17AQI
16AQI
17AQI
15AQI
25AQI
27AQI
42AQI
19AQI
15AQI
17AQI
17AQI
17AQI
21AQI
19AQI
25AQI
21AQI
26AQI
21AQI
38AQI
29AQI
21AQI
26AQI
28AQI
21AQI
26AQI
22AQI
18AQI
42AQI
37AQI
18AQI
21AQI
21AQI
19AQI
19AQI
18AQI
24AQI
27AQI
30AQI
26AQI
48AQI
47AQI
47AQI
50AQI
24AQI
18AQI
36AQI
53AQI
38AQI
22AQI
24AQI
27AQI
33AQI
32AQI
39AQI
50AQI
44AQI
49AQI
24AQI
17AQI
30AQI
16AQI
15AQI
16AQI
16AQI
20AQI
21AQI
21AQI
24AQI
16AQI
19AQI
19AQI
20AQI
17AQI
18AQI
20AQI
20AQI
23AQI
18AQI
18AQI
20AQI
17AQI
18AQI
18AQI
19AQI
19AQI
17AQI
18AQI
17AQI
18AQI
18AQI
18AQI
19AQI
18AQI
16AQI
14AQI
13AQI
14AQI
14AQI
14AQI
13AQI
13AQI
18AQI
22AQI
21AQI
20AQI
18AQI
19AQI
23AQI
28AQI
26AQI
17AQI
No. of days
202522AQI
Highest AQI recorded in
July28AQI
Lowest AQI recorded in
September17AQI
202419AQI
Highest AQI recorded in
December24AQI
Lowest AQI recorded in
November12AQI
202322AQI
Highest AQI recorded in
September27AQI
Lowest AQI recorded in
November18AQI
202221AQI
Highest AQI recorded in
October25AQI
Lowest AQI recorded in
June18AQI
202122AQI
Highest AQI recorded in
August25AQI
Lowest AQI recorded in
February19AQI
202021AQI
Highest AQI recorded in
April24AQI
Lowest AQI recorded in
September18AQI
Most & Least Polluted Years Over the Last 6 Years
Cape Breton's annual 2025 AQI (22) shows an average percentage change of 5.1% (worsened AQI) compared to previous years: 2020 (21), 2021 (22), 2022 (21), 2023 (22), 2024 (19).