Maisonneuve, Longueuil, Quebec, 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
Maisonneuve, Longueuil, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (1st October):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 28 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 30th Sep - 1st Oct 2026
Maisonneuve, Longueuil, Quebec, Canada
6 AM30th Sep 2026
7 PM
5 AM1st Oct 2026
42AQI
21AQI
29AQI
21AQI
In the last 24 hours,
Maisonneuve's AQI reached its highest point of 42 at 4 PM during the Day, while the lowest point, 21, was recorded at 1 AM during the Night between 30th Sep and 1st Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Maisonneuve, Longueuil, Quebec, Canada
20°C15/27°C
22°C19/28°C
21°C17/25°C
18°C16/22°C
17°C12/23°C
20°C12/30°C
19°C16/25°C
18°C14/22°C
20°C14/24°C
15°C10/21°C
17°C10/24°C
19°C17/22°C
15°C12/19°C
14°C9/18°C
19°C15/25°C
18°C13/24°C
16°C11/21°C
12°C7/17°C
13°C9/20°C
13°C10/16°C
12°C7/18°C
13°C7/19°C
14°C8/21°C
16°C10/23°C
17°C13/23°C
16°C13/20°C
12°C11/15°C
14°C11/19°C
15°C11/20°C
19°C14/24°C
31AQI
24AQI
33AQI
24AQI
2026 Days Vs Air Quality
Maisonneuve, Longueuil, Quebec, Canada
95%
258
5%
13
Total number of days with different AQI categories in last 274 days in 2026 (91 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 274 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
Maisonneuve, Longueuil, Quebec, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI (US)
31AQI (US)
18AQI (US)
41AQI (US)
43AQI (US)
59AQI (US)
57AQI (US)
65AQI (US)
44AQI (US)
16AQI (US)
17AQI (US)
18AQI (US)
48AQI (US)
41AQI (US)
35AQI (US)
16AQI (US)
39AQI (US)
34AQI (US)
45AQI (US)
21AQI (US)
27AQI (US)
48AQI (US)
53AQI (US)
48AQI (US)
47AQI (US)
47AQI (US)
45AQI (US)
46AQI (US)
51AQI (US)
50AQI (US)
45AQI (US)
48AQI (US)
48AQI (US)
50AQI (US)
53AQI (US)
49AQI (US)
40AQI (US)
39AQI (US)
44AQI (US)
45AQI (US)
46AQI (US)
47AQI (US)
46AQI (US)
54AQI (US)
50AQI (US)
42AQI (US)
43AQI (US)
45AQI (US)
42AQI (US)
41AQI (US)
42AQI (US)
38AQI (US)
35AQI (US)
40AQI (US)
44AQI (US)
42AQI (US)
35AQI (US)
34AQI (US)
38AQI (US)
42AQI (US)
52AQI (US)
45AQI (US)
44AQI (US)
41AQI (US)
38AQI (US)
39AQI (US)
38AQI (US)
39AQI (US)
34AQI (US)
41AQI (US)
41AQI (US)
39AQI (US)
37AQI (US)
36AQI (US)
36AQI (US)
35AQI (US)
33AQI (US)
32AQI (US)
36AQI (US)
36AQI (US)
36AQI (US)
40AQI (US)
36AQI (US)
34AQI (US)
30AQI (US)
31AQI (US)
35AQI (US)
31AQI (US)
27AQI (US)
25AQI (US)
32AQI (US)
35AQI (US)
28AQI (US)
31AQI (US)
29AQI (US)
27AQI (US)
27AQI (US)
31AQI (US)
28AQI (US)
31AQI (US)
33AQI (US)
30AQI (US)
32AQI (US)
34AQI (US)
33AQI (US)
29AQI (US)
34AQI (US)
35AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
30AQI (US)
32AQI (US)
34AQI (US)
29AQI (US)
25AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
25AQI (US)
21AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
33AQI (US)
31AQI (US)
30AQI (US)
30AQI (US)
25AQI (US)
46AQI (US)
52AQI (US)
57AQI (US)
57AQI (US)
53AQI (US)
48AQI (US)
44AQI (US)
44AQI (US)
50AQI (US)
47AQI (US)
45AQI (US)
29AQI (US)
26AQI (US)
18AQI (US)
19AQI (US)
20AQI (US)
25AQI (US)
26AQI (US)
23AQI (US)
21AQI (US)
24AQI (US)
27AQI (US)
25AQI (US)
20AQI (US)
25AQI (US)
24AQI (US)
27AQI (US)
25AQI (US)
25AQI (US)
20AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
21AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
26AQI (US)
29AQI (US)
29AQI (US)
26AQI (US)
27AQI (US)
30AQI (US)
30AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
34AQI (US)
37AQI (US)
37AQI (US)
33AQI (US)
42AQI (US)
43AQI (US)
41AQI (US)
40AQI (US)
28AQI (US)
24AQI (US)
30AQI (US)
41AQI (US)
40AQI (US)
40AQI (US)
51AQI (US)
39AQI (US)
34AQI (US)
48AQI (US)
42AQI (US)
44AQI (US)
31AQI (US)
37AQI (US)
38AQI (US)
40AQI (US)
40AQI (US)
41AQI (US)
27AQI (US)
28AQI (US)
34AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
30AQI (US)
32AQI (US)
27AQI (US)
24AQI (US)
29AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
31AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
28AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
25AQI (US)
21AQI (US)
24AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
35AQI (US)
43AQI (US)
29AQI (US)
28AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
31AQI (US)
23AQI (US)
30AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
27AQI (US)
33AQI (US)
27AQI (US)
26AQI (US)
23AQI (US)
36AQI (US)
28AQI (US)
28AQI (US)
39AQI (US)
44AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
24AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February44AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202532AQI (US)
Highest AQI (US) recorded in
July40AQI (US)
Lowest AQI (US) recorded in
April23AQI (US)
202430AQI (US)
Highest AQI (US) recorded in
December38AQI (US)
Lowest AQI (US) recorded in
April24AQI (US)
202336AQI (US)
Highest AQI (US) recorded in
June59AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202232AQI (US)
Highest AQI (US) recorded in
January41AQI (US)
Lowest AQI (US) recorded in
August19AQI (US)
202131AQI (US)
Highest AQI (US) recorded in
August42AQI (US)
Lowest AQI (US) recorded in
September17AQI (US)
202024AQI (US)
Highest AQI (US) recorded in
November31AQI (US)
Lowest AQI (US) recorded in
October19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Maisonneuve's annual 2026 AQI (US) (33) shows an average percentage change of 8.6% (worsened AQI (US)) compared to previous years: 2020 (24), 2021 (31), 2022 (32), 2023 (36), 2024 (30), 2025 (32).