Portage, Utah, 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
Portage, Utah, United States
AQI Trends: Highest and Lowest
Same Day Analysis (16th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 25 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Oct - 17th Oct 2025
Portage, Utah, United States
7 AM16th Oct 2025
7 PM
6 AM17th Oct 2025
45AQI
13AQI
46AQI
28AQI
In the last 24 hours,
Portage's AQI reached its highest point of 46 at 2 AM during the Night, while the lowest point, 13, was recorded at 3 PM during the Day between 16th Oct and 17th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Portage, Utah, United States
15°C4/25°C
15°C3/26°C
17°C7/27°C
16°C11/25°C
17°C9/26°C
15°C10/21°C
13°C2/23°C
16°C5/26°C
17°C5/28°C
17°C11/27°C
16°C5/28°C
18°C11/26°C
16°C8/25°C
13°C9/19°C
14°C5/23°C
15°C6/25°C
15°C9/24°C
9°C7/10°C
8°C5/12°C
8°C0/16°C
9°C-1/19°C
11°C1/22°C
14°C3/26°C
17°C11/23°C
11°C1/17°C
6°C1/10°C
7°C-4/18°C
12°C7/19°C
9°C5/12°C
7°C6/9°C
--°C/°C
40AQI
38AQI
42AQI
38AQI
2025 Days Vs Air Quality
Portage, Utah, United States
95%
194
5%
11
Total number of days with different AQI categories in last 290 days in 2025 (75 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 290 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Portage, Utah, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI
23AQI
68AQI
54AQI
36AQI
24AQI
19AQI
19AQI
18AQI
18AQI
17AQI
20AQI
24AQI
23AQI
38AQI
49AQI
45AQI
37AQI
34AQI
31AQI
32AQI
30AQI
24AQI
20AQI
18AQI
20AQI
18AQI
23AQI
27AQI
22AQI
24AQI
25AQI
24AQI
17AQI
18AQI
18AQI
25AQI
26AQI
30AQI
25AQI
24AQI
13AQI
17AQI
22AQI
25AQI
26AQI
28AQI
45AQI
30AQI
22AQI
19AQI
21AQI
20AQI
19AQI
21AQI
21AQI
22AQI
23AQI
30AQI
28AQI
28AQI
26AQI
29AQI
31AQI
31AQI
34AQI
32AQI
37AQI
30AQI
25AQI
24AQI
29AQI
31AQI
38AQI
31AQI
31AQI
34AQI
38AQI
41AQI
39AQI
39AQI
37AQI
30AQI
34AQI
34AQI
33AQI
38AQI
41AQI
35AQI
30AQI
29AQI
37AQI
35AQI
42AQI
34AQI
27AQI
27AQI
38AQI
44AQI
44AQI
39AQI
50AQI
37AQI
36AQI
32AQI
36AQI
37AQI
36AQI
34AQI
33AQI
35AQI
46AQI
50AQI
52AQI
47AQI
41AQI
46AQI
40AQI
32AQI
33AQI
37AQI
49AQI
35AQI
27AQI
30AQI
33AQI
38AQI
49AQI
49AQI
39AQI
41AQI
50AQI
52AQI
49AQI
37AQI
33AQI
25AQI
27AQI
31AQI
37AQI
45AQI
55AQI
50AQI
47AQI
38AQI
36AQI
32AQI
36AQI
47AQI
40AQI
38AQI
45AQI
57AQI
52AQI
36AQI
49AQI
58AQI
52AQI
46AQI
48AQI
46AQI
50AQI
42AQI
49AQI
59AQI
42AQI
27AQI
26AQI
26AQI
28AQI
31AQI
26AQI
27AQI
27AQI
25AQI
27AQI
32AQI
33AQI
31AQI
21AQI
25AQI
30AQI
25AQI
38AQI
29AQI
28AQI
19AQI
18AQI
16AQI
34AQI
41AQI
38AQI
27AQI
41AQI
39AQI
48AQI
51AQI
48AQI
38AQI
27AQI
22AQI
36AQI
31AQI
26AQI
25AQI
38AQI
25AQI
26AQI
34AQI
39AQI
43AQI
32AQI
36AQI
No. of days
202533AQI
Highest AQI recorded in
August43AQI
Lowest AQI recorded in
April25AQI
Most & Least Polluted Years Over the Last 1 Years
Portage's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .