Naperville Park District, Naperville, 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
Naperville Park District, Naperville, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (19th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 19 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
Naperville Park District, Naperville, Illinois, United States
6 AM18th Oct 2025
6 PM
5 AM19th Oct 2025
72AQI
56AQI
68AQI
12AQI
In the last 24 hours,
Naperville Park District's AQI reached its highest point of 72 at 1 PM during the Day, while the lowest point, 12, was recorded at 4 AM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Naperville Park District, Naperville, Illinois, United States
--°C/°C
23°C19/28°C
23°C19/29°C
23°C17/29°C
23°C18/31°C
20°C15/24°C
19°C13/26°C
21°C13/32°C
23°C15/33°C
23°C15/31°C
23°C15/34°C
23°C16/32°C
21°C16/29°C
22°C14/32°C
24°C17/34°C
24°C16/33°C
24°C17/32°C
23°C17/31°C
16°C12/19°C
13°C8/18°C
13°C6/21°C
14°C8/21°C
15°C10/20°C
15°C8/23°C
18°C13/24°C
16°C14/22°C
15°C14/17°C
17°C13/23°C
19°C14/28°C
20°C17/24°C
12°C7/16°C
39AQI
36AQI
46AQI
36AQI
2025 Days Vs Air Quality
Naperville Park District, Naperville, Illinois, United States
71%
146
29%
59
0.9%
2
Total number of days with different AQI categories in last 293 days in 2025 (72 days remaining)
Under WHO’s Safe Air Quality Limits: 71%
Health Risk Level:
Low
In 2025, 71% of 293 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
Naperville Park District, Naperville, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
49AQI
41AQI
37AQI
31AQI
19AQI
27AQI
35AQI
26AQI
32AQI
22AQI
24AQI
26AQI
20AQI
36AQI
51AQI
51AQI
51AQI
37AQI
32AQI
20AQI
27AQI
37AQI
51AQI
38AQI
48AQI
20AQI
27AQI
23AQI
45AQI
28AQI
21AQI
26AQI
35AQI
32AQI
26AQI
32AQI
41AQI
17AQI
19AQI
25AQI
34AQI
37AQI
18AQI
23AQI
33AQI
29AQI
41AQI
40AQI
44AQI
52AQI
34AQI
25AQI
25AQI
20AQI
26AQI
21AQI
17AQI
27AQI
27AQI
24AQI
26AQI
29AQI
30AQI
36AQI
43AQI
44AQI
44AQI
41AQI
57AQI
53AQI
85AQI
78AQI
82AQI
75AQI
70AQI
62AQI
74AQI
82AQI
77AQI
67AQI
56AQI
56AQI
49AQI
34AQI
30AQI
39AQI
43AQI
47AQI
56AQI
42AQI
35AQI
47AQI
34AQI
24AQI
39AQI
33AQI
31AQI
52AQI
52AQI
54AQI
67AQI
49AQI
54AQI
66AQI
47AQI
48AQI
40AQI
27AQI
57AQI
72AQI
75AQI
46AQI
25AQI
20AQI
31AQI
26AQI
70AQI
72AQI
64AQI
54AQI
33AQI
28AQI
32AQI
40AQI
42AQI
57AQI
116AQI
107AQI
92AQI
88AQI
87AQI
78AQI
91AQI
61AQI
57AQI
57AQI
51AQI
43AQI
38AQI
49AQI
63AQI
71AQI
52AQI
39AQI
35AQI
23AQI
19AQI
19AQI
29AQI
31AQI
21AQI
18AQI
24AQI
32AQI
30AQI
23AQI
26AQI
34AQI
41AQI
38AQI
42AQI
47AQI
41AQI
19AQI
24AQI
29AQI
29AQI
43AQI
50AQI
49AQI
56AQI
61AQI
55AQI
55AQI
55AQI
57AQI
55AQI
51AQI
51AQI
35AQI
40AQI
21AQI
26AQI
33AQI
40AQI
45AQI
38AQI
44AQI
45AQI
40AQI
58AQI
63AQI
52AQI
36AQI
28AQI
36AQI
23AQI
34AQI
34AQI
30AQI
41AQI
49AQI
29AQI
34AQI
35AQI
57AQI
19AQI
35AQI
32AQI
30AQI
54AQI
50AQI
48AQI
42AQI
39AQI
No. of days
202542AQI
Highest AQI recorded in
June54AQI
Lowest AQI recorded in
May30AQI
Most & Least Polluted Years Over the Last 1 Years
Naperville Park District's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .