South 1st Street, Rockford, Illinois, United States 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
South 1st Street, Rockford, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (11th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 38 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Aug - 12th Aug 2025
South 1st Street, Rockford, Illinois, United States
5 AM11th Aug 2025
8 PM
4 AM12th Aug 2025
42AQI
30AQI
44AQI
32AQI
In the last 24 hours,
South 1st Street's AQI reached its highest point of 44 at 5 AM during the Night, while the lowest point, 30, was recorded at 6 PM during the Day between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
South 1st Street, Rockford, Illinois, United States
21°C13/27°C
23°C13/32°C
24°C15/30°C
25°C19/32°C
19°C14/22°C
19°C8/29°C
23°C17/29°C
20°C17/20°C
21°C13/29°C
24°C14/33°C
28°C21/35°C
27°C22/32°C
25°C21/30°C
24°C22/29°C
26°C20/32°C
28°C21/35°C
27°C19/36°C
22°C19/26°C
19°C13/25°C
18°C11/26°C
18°C6/28°C
18°C6/29°C
19°C11/28°C
21°C13/30°C
22°C14/32°C
25°C18/31°C
27°C19/35°C
28°C21/36°C
25°C23/28°C
25°C21/31°C
--°C/°C
60AQI
60AQI
61AQI
59AQI
2025 Days Vs Air Quality
South 1st Street, Rockford, Illinois, United States
75%
103
22%
31
3%
4
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 224 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 1st Street, Rockford, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
41AQI
28AQI
28AQI
16AQI
21AQI
29AQI
20AQI
23AQI
22AQI
23AQI
26AQI
19AQI
36AQI
47AQI
50AQI
49AQI
36AQI
28AQI
19AQI
22AQI
35AQI
49AQI
29AQI
38AQI
16AQI
31AQI
28AQI
37AQI
23AQI
17AQI
25AQI
35AQI
28AQI
20AQI
21AQI
25AQI
14AQI
21AQI
19AQI
34AQI
36AQI
15AQI
21AQI
37AQI
22AQI
33AQI
36AQI
34AQI
47AQI
29AQI
17AQI
18AQI
15AQI
21AQI
14AQI
14AQI
17AQI
20AQI
16AQI
22AQI
20AQI
26AQI
29AQI
38AQI
37AQI
39AQI
41AQI
54AQI
62AQI
81AQI
75AQI
75AQI
77AQI
71AQI
61AQI
75AQI
84AQI
66AQI
58AQI
54AQI
53AQI
37AQI
26AQI
28AQI
37AQI
39AQI
43AQI
55AQI
27AQI
29AQI
37AQI
22AQI
22AQI
35AQI
26AQI
30AQI
50AQI
47AQI
45AQI
62AQI
39AQI
54AQI
59AQI
45AQI
42AQI
27AQI
26AQI
58AQI
74AQI
70AQI
50AQI
23AQI
20AQI
27AQI
26AQI
76AQI
70AQI
63AQI
51AQI
28AQI
37AQI
32AQI
30AQI
41AQI
46AQI
145AQI
115AQI
100AQI
113AQI
107AQI
79AQI
89AQI
59AQI
56AQI
56AQI
48AQI
38AQI
29AQI
29AQI
25AQI
50AQI
48AQI
78AQI
No. of days
202541AQI
Highest AQI recorded in
August78AQI
Lowest AQI recorded in
May25AQI
Most & Least Polluted Years Over the Last 1 Years
South 1st Street's annual 2025 AQI (41) shows an average percentage change of NaN% (improved AQI) compared to previous years: .