Cass Lake, Bemidji, Minnesota, United States 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
Cass Lake, Bemidji, Minnesota, United States
AQI Trends: Highest and Lowest
Same Day Analysis (15th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 26 of Good air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 15th Oct - 16th Oct 2025
Cass Lake, Bemidji, Minnesota, United States
7 AM15th Oct 2025
6 PM
6 AM16th Oct 2025
37AQI
22AQI
45AQI
24AQI
In the last 24 hours,
Cass Lake's AQI reached its highest point of 45 at 5 AM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 15th Oct and 16th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Cass Lake, Bemidji, Minnesota, United States
23°C19/29°C
18°C13/23°C
17°C14/20°C
14°C13/16°C
16°C13/21°C
18°C16/22°C
16°C8/24°C
17°C9/25°C
17°C9/26°C
18°C13/25°C
14°C5/24°C
17°C9/23°C
18°C10/27°C
20°C11/30°C
20°C14/27°C
20°C14/28°C
22°C16/28°C
19°C8/29°C
24°C20/30°C
19°C10/25°C
9°C5/14°C
8°C4/12°C
7°C-2/17°C
14°C7/22°C
11°C6/17°C
10°C2/20°C
15°C11/19°C
7°C4/12°C
5°C-1/10°C
9°C5/13°C
--°C/°C
34AQI
32AQI
37AQI
33AQI
2025 Days Vs Air Quality
Cass Lake, Bemidji, Minnesota, United States
86%
249
11%
31
2%
5
1%
3
Total number of days with different AQI categories in last 289 days in 2025 (76 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 289 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
Cass Lake, Bemidji, Minnesota, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI
25AQI
21AQI
20AQI
23AQI
29AQI
29AQI
26AQI
33AQI
23AQI
23AQI
24AQI
45AQI
34AQI
23AQI
21AQI
21AQI
21AQI
22AQI
22AQI
22AQI
26AQI
27AQI
28AQI
23AQI
22AQI
23AQI
23AQI
32AQI
38AQI
25AQI
23AQI
25AQI
23AQI
23AQI
23AQI
24AQI
26AQI
25AQI
28AQI
26AQI
26AQI
29AQI
27AQI
34AQI
30AQI
24AQI
24AQI
23AQI
23AQI
27AQI
29AQI
35AQI
37AQI
23AQI
24AQI
34AQI
25AQI
24AQI
25AQI
26AQI
34AQI
29AQI
25AQI
25AQI
27AQI
27AQI
25AQI
26AQI
26AQI
25AQI
27AQI
45AQI
24AQI
16AQI
16AQI
18AQI
21AQI
26AQI
22AQI
28AQI
22AQI
21AQI
34AQI
27AQI
22AQI
18AQI
14AQI
14AQI
16AQI
16AQI
18AQI
16AQI
34AQI
17AQI
23AQI
14AQI
22AQI
25AQI
38AQI
36AQI
50AQI
49AQI
20AQI
15AQI
20AQI
22AQI
19AQI
16AQI
19AQI
18AQI
21AQI
19AQI
19AQI
15AQI
22AQI
21AQI
18AQI
12AQI
23AQI
21AQI
13AQI
16AQI
24AQI
19AQI
27AQI
17AQI
15AQI
36AQI
20AQI
28AQI
34AQI
32AQI
33AQI
30AQI
15AQI
15AQI
15AQI
13AQI
15AQI
16AQI
17AQI
15AQI
18AQI
30AQI
35AQI
34AQI
19AQI
28AQI
41AQI
51AQI
61AQI
76AQI
106AQI
64AQI
57AQI
49AQI
46AQI
52AQI
51AQI
65AQI
75AQI
62AQI
38AQI
28AQI
27AQI
31AQI
29AQI
44AQI
28AQI
25AQI
25AQI
27AQI
28AQI
47AQI
43AQI
25AQI
24AQI
20AQI
20AQI
21AQI
41AQI
28AQI
39AQI
46AQI
28AQI
54AQI
54AQI
34AQI
38AQI
30AQI
31AQI
157AQI
144AQI
142AQI
79AQI
43AQI
35AQI
31AQI
29AQI
68AQI
60AQI
64AQI
32AQI
49AQI
76AQI
60AQI
35AQI
35AQI
66AQI
130AQI
161AQI
162AQI
147AQI
99AQI
80AQI
78AQI
53AQI
35AQI
36AQI
30AQI
31AQI
91AQI
74AQI
64AQI
57AQI
44AQI
24AQI
16AQI
16AQI
21AQI
21AQI
24AQI
33AQI
19AQI
17AQI
18AQI
25AQI
30AQI
30AQI
29AQI
38AQI
43AQI
46AQI
35AQI
35AQI
26AQI
17AQI
19AQI
27AQI
33AQI
40AQI
44AQI
37AQI
41AQI
48AQI
50AQI
49AQI
49AQI
44AQI
26AQI
20AQI
21AQI
19AQI
28AQI
32AQI
33AQI
32AQI
25AQI
26AQI
23AQI
30AQI
38AQI
41AQI
56AQI
57AQI
62AQI
54AQI
21AQI
27AQI
40AQI
29AQI
38AQI
35AQI
38AQI
29AQI
32AQI
26AQI
26AQI
27AQI
24AQI
23AQI
24AQI
43AQI
62AQI
48AQI
33AQI
39AQI
No. of days
202535AQI
Highest AQI recorded in
July62AQI
Lowest AQI recorded in
April23AQI
202424AQI
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
June14AQI
202330AQI
Highest AQI recorded in
June54AQI
Lowest AQI recorded in
February17AQI
202224AQI
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
December18AQI
202147AQI
Highest AQI recorded in
July87AQI
Lowest AQI recorded in
December25AQI
202020AQI
Highest AQI recorded in
December36AQI
Lowest AQI recorded in
July14AQI
Most & Least Polluted Years Over the Last 6 Years
Cass Lake's annual 2025 AQI (35) shows an average percentage change of 29.8% (worsened AQI) compared to previous years: 2020 (20), 2021 (47), 2022 (24), 2023 (30), 2024 (24).