South State Street, Elgin, Illinois, 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
South State Street, Elgin, Illinois, 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 56 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
South State Street, Elgin, Illinois, United States
6 AM18th Oct 2025
6 PM
5 AM19th Oct 2025
66AQI
54AQI
73AQI
12AQI
In the last 24 hours,
South State Street's AQI reached its highest point of 73 at 10 PM during the Night, while the lowest point, 12, was recorded at 5 AM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
South State Street, Elgin, Illinois, United States
23°C17/31°C
23°C18/29°C
22°C18/28°C
22°C17/29°C
22°C18/30°C
19°C15/24°C
18°C13/24°C
21°C12/31°C
22°C14/32°C
22°C15/30°C
23°C14/33°C
22°C15/32°C
21°C15/29°C
21°C14/31°C
23°C15/33°C
23°C16/33°C
22°C16/31°C
22°C16/31°C
16°C12/20°C
12°C8/19°C
11°C5/18°C
13°C7/18°C
13°C8/19°C
14°C8/23°C
16°C12/22°C
15°C11/21°C
14°C12/16°C
16°C12/23°C
18°C12/28°C
19°C17/24°C
--°C/°C
38AQI
35AQI
45AQI
35AQI
2025 Days Vs Air Quality
South State Street, Elgin, Illinois, United States
73%
151
25%
52
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: 73%
Health Risk Level:
Low
In 2025, 73% 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
South State Street, Elgin, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
48AQI
44AQI
34AQI
32AQI
17AQI
23AQI
36AQI
25AQI
29AQI
23AQI
24AQI
27AQI
20AQI
35AQI
49AQI
51AQI
52AQI
41AQI
33AQI
18AQI
21AQI
36AQI
52AQI
35AQI
45AQI
20AQI
31AQI
25AQI
45AQI
28AQI
19AQI
31AQI
38AQI
36AQI
20AQI
27AQI
31AQI
16AQI
19AQI
21AQI
37AQI
37AQI
17AQI
26AQI
36AQI
24AQI
37AQI
38AQI
38AQI
49AQI
30AQI
19AQI
20AQI
17AQI
25AQI
17AQI
16AQI
21AQI
22AQI
17AQI
27AQI
23AQI
28AQI
35AQI
44AQI
40AQI
40AQI
43AQI
57AQI
58AQI
85AQI
76AQI
81AQI
75AQI
70AQI
61AQI
73AQI
81AQI
73AQI
62AQI
55AQI
55AQI
49AQI
31AQI
29AQI
37AQI
40AQI
45AQI
56AQI
36AQI
31AQI
43AQI
28AQI
23AQI
37AQI
32AQI
33AQI
52AQI
50AQI
50AQI
70AQI
44AQI
54AQI
63AQI
49AQI
46AQI
36AQI
28AQI
59AQI
73AQI
73AQI
48AQI
26AQI
24AQI
31AQI
26AQI
72AQI
68AQI
61AQI
52AQI
29AQI
30AQI
32AQI
38AQI
42AQI
48AQI
131AQI
111AQI
98AQI
108AQI
97AQI
79AQI
93AQI
63AQI
57AQI
57AQI
51AQI
42AQI
33AQI
51AQI
61AQI
69AQI
52AQI
35AQI
32AQI
21AQI
18AQI
19AQI
28AQI
31AQI
22AQI
17AQI
25AQI
34AQI
31AQI
22AQI
23AQI
32AQI
42AQI
40AQI
46AQI
45AQI
40AQI
19AQI
25AQI
35AQI
30AQI
47AQI
49AQI
46AQI
58AQI
60AQI
55AQI
56AQI
55AQI
57AQI
55AQI
50AQI
41AQI
36AQI
39AQI
26AQI
26AQI
32AQI
39AQI
41AQI
34AQI
40AQI
40AQI
39AQI
59AQI
67AQI
53AQI
37AQI
23AQI
27AQI
24AQI
35AQI
32AQI
30AQI
46AQI
47AQI
28AQI
27AQI
36AQI
56AQI
35AQI
32AQI
28AQI
52AQI
50AQI
49AQI
42AQI
39AQI
No. of days
202542AQI
Highest AQI recorded in
June52AQI
Lowest AQI recorded in
May28AQI
Most & Least Polluted Years Over the Last 1 Years
South State Street's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .