West Alton, Missouri, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
West Alton, Missouri, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 62 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
West Alton, Missouri, United States
6 AM29th Sep 2025
7 PM
5 AM30th Sep 2025
90AQI
40AQI
69AQI
38AQI
In the last 24 hours,
West Alton's AQI reached its highest point of 90 at 12 PM during the Day, while the lowest point, 38, was recorded at 7 PM during the Night between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
West Alton, Missouri, United States
21°C16/28°C
21°C11/29°C
21°C13/30°C
22°C13/31°C
19°C13/25°C
18°C14/24°C
19°C11/26°C
17°C7/25°C
16°C6/26°C
18°C7/28°C
24°C16/32°C
25°C15/34°C
25°C16/35°C
27°C19/36°C
29°C21/38°C
27°C20/35°C
26°C20/35°C
25°C15/34°C
25°C14/35°C
23°C18/29°C
22°C18/29°C
24°C16/33°C
22°C18/28°C
21°C17/29°C
21°C18/26°C
20°C14/27°C
21°C12/30°C
22°C12/32°C
23°C13/34°C
24°C15/34°C
--°C/°C
50AQI
46AQI
48AQI
44AQI
2025 Days Vs Air Quality
West Alton, Missouri, United States
71%
133
28%
53
0.5%
1
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 71%
Health Risk Level:
Low
In 2025, 71% of 273 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
West Alton, Missouri, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
52AQI
39AQI
42AQI
26AQI
18AQI
36AQI
40AQI
31AQI
26AQI
25AQI
21AQI
34AQI
24AQI
33AQI
42AQI
41AQI
58AQI
44AQI
41AQI
23AQI
40AQI
50AQI
57AQI
48AQI
51AQI
22AQI
38AQI
40AQI
46AQI
39AQI
25AQI
26AQI
41AQI
35AQI
31AQI
27AQI
29AQI
27AQI
19AQI
19AQI
34AQI
31AQI
31AQI
28AQI
41AQI
37AQI
36AQI
30AQI
40AQI
57AQI
46AQI
28AQI
25AQI
36AQI
28AQI
17AQI
17AQI
22AQI
31AQI
35AQI
21AQI
25AQI
27AQI
48AQI
31AQI
44AQI
41AQI
50AQI
61AQI
50AQI
42AQI
53AQI
82AQI
56AQI
60AQI
62AQI
78AQI
80AQI
50AQI
36AQI
47AQI
32AQI
40AQI
37AQI
25AQI
45AQI
52AQI
53AQI
59AQI
54AQI
52AQI
51AQI
37AQI
28AQI
25AQI
28AQI
30AQI
46AQI
54AQI
64AQI
82AQI
60AQI
40AQI
52AQI
38AQI
43AQI
49AQI
35AQI
35AQI
31AQI
38AQI
38AQI
33AQI
31AQI
51AQI
54AQI
30AQI
44AQI
56AQI
58AQI
47AQI
49AQI
29AQI
39AQI
50AQI
48AQI
43AQI
113AQI
80AQI
44AQI
38AQI
32AQI
51AQI
55AQI
55AQI
51AQI
46AQI
44AQI
48AQI
46AQI
63AQI
58AQI
56AQI
58AQI
61AQI
52AQI
27AQI
22AQI
31AQI
42AQI
24AQI
26AQI
30AQI
39AQI
45AQI
50AQI
39AQI
32AQI
28AQI
30AQI
46AQI
56AQI
54AQI
30AQI
26AQI
31AQI
44AQI
54AQI
62AQI
62AQI
60AQI
59AQI
57AQI
59AQI
56AQI
64AQI
47AQI
51AQI
44AQI
40AQI
45AQI
32AQI
26AQI
36AQI
44AQI
52AQI
62AQI
35AQI
37AQI
31AQI
49AQI
45AQI
47AQI
47AQI
No. of days
202542AQI
Highest AQI recorded in
June49AQI
Lowest AQI recorded in
May31AQI
Most & Least Polluted Years Over the Last 1 Years
West Alton's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .