Sault Ste. Marie, Ontario, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Sault Ste. Marie, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (4th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 91 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Sault Ste. Marie, Ontario, Canada
6 AM4th Aug 2025
9 PM
5 AM5th Aug 2025
98AQI
80AQI
90AQI
81AQI
In the last 24 hours,
Sault Ste. Marie's AQI reached its highest point of 98 at 1 PM during the Day, while the lowest point, 80, was recorded at 10 AM during the Day between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Sault Ste. Marie, Ontario, Canada
20°C15/24°C
17°C12/23°C
16°C7/25°C
17°C11/21°C
17°C8/25°C
20°C9/28°C
20°C17/24°C
21°C16/26°C
21°C16/29°C
23°C13/31°C
20°C14/27°C
14°C10/20°C
15°C5/26°C
17°C14/21°C
15°C10/21°C
16°C6/25°C
17°C7/27°C
22°C17/27°C
19°C14/23°C
17°C12/24°C
20°C11/30°C
24°C18/30°C
20°C14/22°C
18°C13/24°C
15°C10/22°C
16°C11/22°C
15°C6/24°C
16°C8/23°C
17°C8/26°C
18°C6/28°C
--°C/°C
60AQI
59AQI
58AQI
58AQI
2025 Days Vs Air Quality
Sault Ste. Marie, Ontario, Canada
88%
190
11%
23
1%
3
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 217 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
Sault Ste. Marie, Ontario, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
23AQI
21AQI
22AQI
22AQI
21AQI
21AQI
23AQI
24AQI
44AQI
29AQI
25AQI
27AQI
23AQI
29AQI
32AQI
27AQI
30AQI
24AQI
26AQI
29AQI
32AQI
33AQI
26AQI
37AQI
30AQI
27AQI
27AQI
26AQI
26AQI
26AQI
26AQI
32AQI
31AQI
27AQI
25AQI
33AQI
33AQI
28AQI
27AQI
29AQI
27AQI
28AQI
26AQI
40AQI
41AQI
28AQI
26AQI
25AQI
23AQI
24AQI
26AQI
39AQI
44AQI
39AQI
25AQI
26AQI
26AQI
26AQI
26AQI
25AQI
35AQI
42AQI
28AQI
26AQI
26AQI
27AQI
27AQI
26AQI
28AQI
25AQI
26AQI
38AQI
53AQI
21AQI
19AQI
21AQI
22AQI
21AQI
21AQI
22AQI
23AQI
21AQI
18AQI
23AQI
23AQI
19AQI
18AQI
16AQI
16AQI
20AQI
17AQI
19AQI
19AQI
18AQI
18AQI
16AQI
17AQI
21AQI
29AQI
33AQI
34AQI
31AQI
31AQI
14AQI
13AQI
16AQI
35AQI
18AQI
17AQI
16AQI
12AQI
15AQI
20AQI
19AQI
15AQI
22AQI
21AQI
20AQI
15AQI
18AQI
15AQI
15AQI
20AQI
18AQI
22AQI
19AQI
16AQI
20AQI
20AQI
18AQI
22AQI
26AQI
27AQI
32AQI
28AQI
27AQI
14AQI
12AQI
13AQI
14AQI
12AQI
11AQI
13AQI
16AQI
23AQI
24AQI
22AQI
28AQI
33AQI
25AQI
25AQI
31AQI
64AQI
67AQI
66AQI
64AQI
62AQI
67AQI
62AQI
54AQI
60AQI
55AQI
30AQI
26AQI
27AQI
35AQI
40AQI
35AQI
33AQI
34AQI
39AQI
38AQI
46AQI
38AQI
38AQI
37AQI
25AQI
21AQI
28AQI
27AQI
31AQI
33AQI
37AQI
31AQI
39AQI
44AQI
35AQI
34AQI
39AQI
35AQI
39AQI
52AQI
90AQI
94AQI
77AQI
62AQI
32AQI
32AQI
29AQI
41AQI
39AQI
31AQI
37AQI
33AQI
53AQI
63AQI
53AQI
48AQI
59AQI
78AQI
104AQI
95AQI
133AQI
107AQI
91AQI
27AQI
30AQI
25AQI
20AQI
20AQI
42AQI
49AQI
107AQI
No. of days
202532AQI
Highest AQI recorded in
August107AQI
Lowest AQI recorded in
May20AQI
202425AQI
Highest AQI recorded in
August34AQI
Lowest AQI recorded in
April8AQI
202325AQI
Highest AQI recorded in
December25AQI
Lowest AQI recorded in
November25AQI
202026AQI
Highest AQI recorded in
May33AQI
Lowest AQI recorded in
October21AQI
Most & Least Polluted Years Over the Last 4 Years
Sault Ste. Marie's annual 2025 AQI (32) shows an average percentage change of 25.1% (worsened AQI) compared to previous years: 2020 (26), 2023 (25), 2024 (25).