Halifax Johnston, Halifax, 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
Halifax Johnston, Halifax, Nova Scotia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 24 of Good air quality, showing improvement over 2023 on the same day.
Day & Night AQI Trend: 28th Sep - 29th Sep 2026
Halifax Johnston, Halifax, Nova Scotia, Canada
6 AM28th Sep 2026
7 PM
5 AM29th Sep 2026
55AQI
18AQI
30AQI
19AQI
In the last 24 hours,
Halifax Johnston's AQI reached its highest point of 55 at 11 AM during the Day, while the lowest point, 18, was recorded at 8 AM during the Day between 28th Sep and 29th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Halifax Johnston, Halifax, Nova Scotia, Canada
19°C14/25°C
18°C13/25°C
17°C12/21°C
18°C15/21°C
19°C18/24°C
16°C15/19°C
14°C13/16°C
14°C12/16°C
14°C11/19°C
12°C8/17°C
17°C11/23°C
16°C12/21°C
14°C9/20°C
15°C8/20°C
19°C14/25°C
14°C9/21°C
15°C9/23°C
16°C11/23°C
15°C12/18°C
11°C6/16°C
9°C4/13°C
13°C8/16°C
10°C6/17°C
9°C4/17°C
10°C4/19°C
13°C7/21°C
13°C11/14°C
13°C11/19°C
13°C11/14°C
16°C14/19°C
32AQI
24AQI
34AQI
27AQI
2026 Days Vs Air Quality
Halifax Johnston, Halifax, Nova Scotia, Canada
95%
256
5%
13
Total number of days with different AQI categories in last 272 days in 2026 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% 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
Halifax Johnston, Halifax, Nova Scotia, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI (US)
13AQI (US)
13AQI (US)
16AQI (US)
21AQI (US)
38AQI (US)
16AQI (US)
13AQI (US)
18AQI (US)
18AQI (US)
14AQI (US)
12AQI (US)
17AQI (US)
28AQI (US)
17AQI (US)
18AQI (US)
17AQI (US)
28AQI (US)
18AQI (US)
18AQI (US)
12AQI (US)
48AQI (US)
56AQI (US)
48AQI (US)
47AQI (US)
48AQI (US)
45AQI (US)
48AQI (US)
52AQI (US)
51AQI (US)
47AQI (US)
47AQI (US)
51AQI (US)
48AQI (US)
50AQI (US)
49AQI (US)
42AQI (US)
40AQI (US)
47AQI (US)
47AQI (US)
47AQI (US)
47AQI (US)
45AQI (US)
52AQI (US)
51AQI (US)
43AQI (US)
45AQI (US)
45AQI (US)
44AQI (US)
40AQI (US)
43AQI (US)
37AQI (US)
34AQI (US)
41AQI (US)
45AQI (US)
45AQI (US)
38AQI (US)
36AQI (US)
39AQI (US)
42AQI (US)
56AQI (US)
48AQI (US)
47AQI (US)
44AQI (US)
39AQI (US)
41AQI (US)
41AQI (US)
41AQI (US)
35AQI (US)
42AQI (US)
44AQI (US)
40AQI (US)
38AQI (US)
36AQI (US)
39AQI (US)
36AQI (US)
33AQI (US)
34AQI (US)
38AQI (US)
36AQI (US)
37AQI (US)
41AQI (US)
38AQI (US)
34AQI (US)
29AQI (US)
30AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
25AQI (US)
34AQI (US)
34AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
30AQI (US)
27AQI (US)
33AQI (US)
29AQI (US)
30AQI (US)
34AQI (US)
29AQI (US)
34AQI (US)
34AQI (US)
34AQI (US)
31AQI (US)
34AQI (US)
33AQI (US)
29AQI (US)
29AQI (US)
24AQI (US)
27AQI (US)
32AQI (US)
33AQI (US)
29AQI (US)
24AQI (US)
24AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
22AQI (US)
30AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
27AQI (US)
34AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
24AQI (US)
46AQI (US)
54AQI (US)
55AQI (US)
58AQI (US)
54AQI (US)
49AQI (US)
46AQI (US)
42AQI (US)
52AQI (US)
47AQI (US)
45AQI (US)
30AQI (US)
27AQI (US)
18AQI (US)
19AQI (US)
25AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
23AQI (US)
25AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
23AQI (US)
24AQI (US)
27AQI (US)
26AQI (US)
30AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
20AQI (US)
23AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
36AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
29AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
31AQI (US)
29AQI (US)
31AQI (US)
30AQI (US)
33AQI (US)
29AQI (US)
39AQI (US)
52AQI (US)
35AQI (US)
29AQI (US)
39AQI (US)
32AQI (US)
25AQI (US)
38AQI (US)
39AQI (US)
32AQI (US)
41AQI (US)
42AQI (US)
42AQI (US)
39AQI (US)
35AQI (US)
41AQI (US)
46AQI (US)
38AQI (US)
30AQI (US)
32AQI (US)
36AQI (US)
46AQI (US)
47AQI (US)
27AQI (US)
26AQI (US)
25AQI (US)
27AQI (US)
33AQI (US)
29AQI (US)
36AQI (US)
45AQI (US)
34AQI (US)
26AQI (US)
34AQI (US)
38AQI (US)
27AQI (US)
25AQI (US)
27AQI (US)
31AQI (US)
36AQI (US)
23AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
29AQI (US)
24AQI (US)
27AQI (US)
28AQI (US)
23AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
29AQI (US)
32AQI (US)
32AQI (US)
30AQI (US)
25AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
33AQI (US)
27AQI (US)
30AQI (US)
29AQI (US)
29AQI (US)
38AQI (US)
29AQI (US)
30AQI (US)
36AQI (US)
41AQI (US)
38AQI (US)
27AQI (US)
31AQI (US)
25AQI (US)
24AQI (US)
28AQI (US)
44AQI (US)
38AQI (US)
30AQI (US)
36AQI (US)
26AQI (US)
33AQI (US)
32AQI (US)
30AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February44AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202524AQI (US)
Highest AQI (US) recorded in
June30AQI (US)
Lowest AQI (US) recorded in
May20AQI (US)
202419AQI (US)
Highest AQI (US) recorded in
August27AQI (US)
Lowest AQI (US) recorded in
November13AQI (US)
202322AQI (US)
Highest AQI (US) recorded in
July34AQI (US)
Lowest AQI (US) recorded in
January18AQI (US)
202222AQI (US)
Highest AQI (US) recorded in
July27AQI (US)
Lowest AQI (US) recorded in
November19AQI (US)
202123AQI (US)
Highest AQI (US) recorded in
August30AQI (US)
Lowest AQI (US) recorded in
January17AQI (US)
202023AQI (US)
Highest AQI (US) recorded in
July28AQI (US)
Lowest AQI (US) recorded in
September19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Halifax Johnston's annual 2026 AQI (US) (33) shows an average percentage change of 49.6% (worsened AQI (US)) compared to previous years: 2020 (23), 2021 (23), 2022 (22), 2023 (22), 2024 (19), 2025 (24).