University of South Dakota, Sioux Falls, South Dakota, 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
University of South Dakota, Sioux Falls, South Dakota, United States
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 40 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
University of South Dakota, Sioux Falls, South Dakota, United States
7 AM18th Oct 2025
7 PM
6 AM19th Oct 2025
52AQI
34AQI
54AQI
10AQI
In the last 24 hours,
University of South Dakota's AQI reached its highest point of 54 at 11 PM during the Night, while the lowest point, 10, was recorded at 2 AM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
University of South Dakota, Sioux Falls, South Dakota, United States
17°C14/22°C
19°C16/24°C
19°C11/27°C
22°C15/31°C
20°C12/29°C
20°C12/30°C
20°C10/32°C
22°C11/33°C
20°C12/27°C
19°C8/32°C
24°C14/36°C
24°C19/30°C
23°C17/31°C
24°C19/33°C
24°C15/34°C
26°C21/34°C
21°C13/27°C
13°C7/20°C
12°C4/19°C
13°C3/24°C
19°C13/27°C
16°C9/23°C
15°C6/22°C
20°C14/31°C
11°C3/19°C
10°C9/13°C
12°C9/15°C
21°C15/30°C
17°C12/23°C
11°C7/18°C
--°C/°C
45AQI
42AQI
52AQI
42AQI
2025 Days Vs Air Quality
University of South Dakota, Sioux Falls, South Dakota, United States
79%
163
19%
40
1%
3
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2025, 79% of 292 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
University of South Dakota, Sioux Falls, South Dakota, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
35AQI
45AQI
26AQI
17AQI
20AQI
24AQI
29AQI
20AQI
25AQI
20AQI
18AQI
16AQI
28AQI
37AQI
23AQI
26AQI
59AQI
58AQI
23AQI
15AQI
40AQI
57AQI
28AQI
18AQI
38AQI
28AQI
24AQI
21AQI
22AQI
16AQI
21AQI
20AQI
32AQI
14AQI
28AQI
24AQI
17AQI
21AQI
37AQI
33AQI
33AQI
30AQI
30AQI
42AQI
37AQI
41AQI
40AQI
41AQI
40AQI
38AQI
26AQI
17AQI
18AQI
19AQI
16AQI
15AQI
14AQI
24AQI
25AQI
24AQI
29AQI
27AQI
25AQI
23AQI
20AQI
44AQI
93AQI
64AQI
71AQI
58AQI
57AQI
57AQI
51AQI
61AQI
54AQI
64AQI
66AQI
68AQI
59AQI
46AQI
35AQI
26AQI
23AQI
24AQI
29AQI
35AQI
50AQI
50AQI
38AQI
29AQI
28AQI
20AQI
17AQI
23AQI
25AQI
23AQI
29AQI
30AQI
37AQI
46AQI
31AQI
37AQI
41AQI
29AQI
33AQI
28AQI
33AQI
50AQI
69AQI
54AQI
48AQI
34AQI
25AQI
25AQI
27AQI
27AQI
37AQI
37AQI
40AQI
36AQI
35AQI
29AQI
29AQI
30AQI
26AQI
44AQI
118AQI
125AQI
102AQI
85AQI
62AQI
55AQI
30AQI
37AQI
50AQI
29AQI
31AQI
87AQI
74AQI
38AQI
38AQI
50AQI
44AQI
30AQI
17AQI
18AQI
22AQI
30AQI
28AQI
23AQI
20AQI
20AQI
31AQI
31AQI
36AQI
39AQI
46AQI
38AQI
37AQI
32AQI
54AQI
56AQI
27AQI
23AQI
30AQI
45AQI
47AQI
48AQI
48AQI
55AQI
52AQI
48AQI
32AQI
37AQI
31AQI
27AQI
19AQI
18AQI
19AQI
26AQI
27AQI
29AQI
46AQI
51AQI
46AQI
42AQI
57AQI
58AQI
58AQI
60AQI
66AQI
82AQI
58AQI
47AQI
47AQI
55AQI
64AQI
58AQI
62AQI
53AQI
39AQI
39AQI
23AQI
47AQI
39AQI
40AQI
29AQI
28AQI
28AQI
45AQI
39AQI
44AQI
39AQI
52AQI
No. of days
202538AQI
Highest AQI recorded in
October52AQI
Lowest AQI recorded in
April28AQI
Most & Least Polluted Years Over the Last 1 Years
University of South Dakota's annual 2025 AQI (38) shows an average percentage change of NaN% (improved AQI) compared to previous years: .