Kitchener, Waterloo, Ontario, 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
Kitchener, Waterloo, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (31st October):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 17 of Good air quality on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Kitchener, Waterloo, Ontario, Canada
7 AM29th Sep 2026
7 PM
6 AM30th Sep 2026
50AQI
21AQI
47AQI
23AQI
In the last 24 hours,
Kitchener's AQI reached its highest point of 50 at 12 PM during the Day, while the lowest point, 21, was recorded at 8 AM during the Day between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Kitchener, Waterloo, Ontario, Canada
25°C20/32°C
24°C20/32°C
22°C17/27°C
20°C16/25°C
19°C14/24°C
18°C13/24°C
18°C11/27°C
18°C11/26°C
20°C16/24°C
19°C14/25°C
17°C8/25°C
18°C10/26°C
18°C12/22°C
13°C9/18°C
17°C12/22°C
20°C16/23°C
18°C16/22°C
15°C12/20°C
13°C10/16°C
14°C10/19°C
10°C6/13°C
10°C6/15°C
12°C7/17°C
12°C9/17°C
13°C8/19°C
15°C9/21°C
16°C11/22°C
15°C11/20°C
17°C13/22°C
17°C14/22°C
34AQI
28AQI
33AQI
29AQI
2026 Days Vs Air Quality
Kitchener, Waterloo, Ontario, Canada
81%
220
16%
44
1%
4
0.7%
2
Total number of days with different AQI categories in last 274 days in 2026 (91 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2026, 81% of 274 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Kitchener, Waterloo, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
7AQI (US)
7AQI (US)
21AQI (US)
15AQI (US)
66AQI (US)
89AQI (US)
60AQI (US)
71AQI (US)
33AQI (US)
25AQI (US)
22AQI (US)
44AQI (US)
55AQI (US)
39AQI (US)
11AQI (US)
36AQI (US)
44AQI (US)
28AQI (US)
32AQI (US)
19AQI (US)
40AQI (US)
53AQI (US)
60AQI (US)
48AQI (US)
49AQI (US)
48AQI (US)
44AQI (US)
42AQI (US)
49AQI (US)
59AQI (US)
44AQI (US)
45AQI (US)
74AQI (US)
73AQI (US)
43AQI (US)
55AQI (US)
76AQI (US)
39AQI (US)
43AQI (US)
45AQI (US)
49AQI (US)
40AQI (US)
39AQI (US)
52AQI (US)
84AQI (US)
80AQI (US)
103AQI (US)
116AQI (US)
61AQI (US)
46AQI (US)
50AQI (US)
41AQI (US)
34AQI (US)
40AQI (US)
42AQI (US)
59AQI (US)
33AQI (US)
72AQI (US)
39AQI (US)
38AQI (US)
52AQI (US)
59AQI (US)
96AQI (US)
76AQI (US)
58AQI (US)
78AQI (US)
34AQI (US)
35AQI (US)
59AQI (US)
45AQI (US)
38AQI (US)
43AQI (US)
36AQI (US)
32AQI (US)
37AQI (US)
34AQI (US)
35AQI (US)
65AQI (US)
81AQI (US)
41AQI (US)
59AQI (US)
39AQI (US)
35AQI (US)
46AQI (US)
61AQI (US)
29AQI (US)
31AQI (US)
36AQI (US)
43AQI (US)
66AQI (US)
30AQI (US)
30AQI (US)
40AQI (US)
29AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
37AQI (US)
49AQI (US)
33AQI (US)
31AQI (US)
47AQI (US)
47AQI (US)
48AQI (US)
42AQI (US)
50AQI (US)
41AQI (US)
32AQI (US)
28AQI (US)
33AQI (US)
37AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
30AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
31AQI (US)
33AQI (US)
40AQI (US)
39AQI (US)
27AQI (US)
34AQI (US)
31AQI (US)
27AQI (US)
27AQI (US)
42AQI (US)
23AQI (US)
41AQI (US)
56AQI (US)
67AQI (US)
63AQI (US)
45AQI (US)
49AQI (US)
45AQI (US)
43AQI (US)
50AQI (US)
40AQI (US)
44AQI (US)
32AQI (US)
30AQI (US)
28AQI (US)
27AQI (US)
28AQI (US)
33AQI (US)
31AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
42AQI (US)
46AQI (US)
36AQI (US)
29AQI (US)
48AQI (US)
45AQI (US)
38AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
27AQI (US)
32AQI (US)
32AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
38AQI (US)
34AQI (US)
38AQI (US)
37AQI (US)
41AQI (US)
56AQI (US)
56AQI (US)
48AQI (US)
39AQI (US)
38AQI (US)
53AQI (US)
43AQI (US)
35AQI (US)
32AQI (US)
43AQI (US)
37AQI (US)
60AQI (US)
68AQI (US)
64AQI (US)
52AQI (US)
148AQI (US)
214AQI (US)
220AQI (US)
126AQI (US)
57AQI (US)
46AQI (US)
66AQI (US)
23AQI (US)
25AQI (US)
27AQI (US)
25AQI (US)
40AQI (US)
48AQI (US)
52AQI (US)
26AQI (US)
30AQI (US)
33AQI (US)
52AQI (US)
35AQI (US)
29AQI (US)
28AQI (US)
29AQI (US)
34AQI (US)
40AQI (US)
35AQI (US)
29AQI (US)
33AQI (US)
33AQI (US)
35AQI (US)
40AQI (US)
31AQI (US)
30AQI (US)
31AQI (US)
27AQI (US)
29AQI (US)
30AQI (US)
34AQI (US)
26AQI (US)
30AQI (US)
30AQI (US)
35AQI (US)
27AQI (US)
25AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
23AQI (US)
32AQI (US)
48AQI (US)
48AQI (US)
29AQI (US)
26AQI (US)
30AQI (US)
33AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
31AQI (US)
35AQI (US)
34AQI (US)
35AQI (US)
33AQI (US)
33AQI (US)
29AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
30AQI (US)
28AQI (US)
27AQI (US)
30AQI (US)
27AQI (US)
31AQI (US)
40AQI (US)
44AQI (US)
28AQI (US)
30AQI (US)
36AQI (US)
41AQI (US)
56AQI (US)
49AQI (US)
35AQI (US)
37AQI (US)
33AQI (US)
60AQI (US)
31AQI (US)
32AQI (US)
No. of days
202642AQI (US)
Highest AQI (US) recorded in
July60AQI (US)
Lowest AQI (US) recorded in
August31AQI (US)
202535AQI (US)
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
January37AQI (US)
Lowest AQI (US) recorded in
November25AQI (US)
202342AQI (US)
Highest AQI (US) recorded in
June72AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202235AQI (US)
Highest AQI (US) recorded in
June39AQI (US)
Lowest AQI (US) recorded in
August17AQI (US)
202137AQI (US)
Highest AQI (US) recorded in
July46AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202032AQI (US)
Highest AQI (US) recorded in
November35AQI (US)
Lowest AQI (US) recorded in
October24AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Kitchener's annual 2026 AQI (US) (42) shows an average percentage change of 18.6% (worsened AQI (US)) compared to previous years: 2020 (32), 2021 (37), 2022 (35), 2023 (42), 2024 (33), 2025 (35).