Pomeroy, Washington, 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
Pomeroy, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (25th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 35 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 25th Sep - 26th Sep 2025
Pomeroy, Washington, United States
6 AM25th Sep 2025
7 PM
5 AM26th Sep 2025
52AQI
27AQI
70AQI
31AQI
In the last 24 hours,
Pomeroy's AQI reached its highest point of 70 at 5 AM during the Night, while the lowest point, 27, was recorded at 8 AM during the Day between 25th Sep and 26th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Pomeroy, Washington, United States
22°C19/25°C
23°C17/30°C
25°C18/32°C
26°C19/35°C
27°C20/37°C
27°C21/35°C
28°C21/36°C
30°C23/37°C
29°C21/36°C
27°C19/35°C
23°C18/33°C
23°C16/30°C
22°C15/29°C
21°C15/28°C
22°C16/27°C
20°C15/27°C
20°C15/25°C
22°C15/29°C
17°C14/19°C
14°C10/19°C
19°C10/28°C
22°C15/30°C
22°C16/29°C
23°C17/30°C
24°C19/30°C
18°C12/22°C
14°C8/21°C
18°C10/26°C
21°C13/29°C
20°C15/26°C
--°C/°C
55AQI
49AQI
51AQI
50AQI
2025 Days Vs Air Quality
Pomeroy, Washington, United States
89%
163
11%
20
0.5%
1
Total number of days with different AQI categories in last 269 days in 2025 (96 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 269 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
Pomeroy, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
17AQI
17AQI
15AQI
18AQI
16AQI
17AQI
23AQI
16AQI
20AQI
20AQI
19AQI
20AQI
13AQI
13AQI
16AQI
15AQI
17AQI
18AQI
22AQI
26AQI
23AQI
17AQI
19AQI
19AQI
19AQI
13AQI
16AQI
17AQI
28AQI
24AQI
26AQI
30AQI
20AQI
15AQI
17AQI
18AQI
24AQI
17AQI
13AQI
13AQI
15AQI
17AQI
15AQI
18AQI
19AQI
16AQI
14AQI
13AQI
15AQI
17AQI
13AQI
13AQI
13AQI
13AQI
12AQI
12AQI
16AQI
17AQI
18AQI
21AQI
19AQI
14AQI
16AQI
16AQI
14AQI
20AQI
17AQI
13AQI
15AQI
17AQI
19AQI
19AQI
19AQI
20AQI
24AQI
26AQI
26AQI
33AQI
25AQI
19AQI
20AQI
21AQI
22AQI
18AQI
18AQI
18AQI
18AQI
17AQI
21AQI
35AQI
35AQI
19AQI
14AQI
13AQI
15AQI
17AQI
21AQI
26AQI
22AQI
18AQI
26AQI
20AQI
20AQI
21AQI
20AQI
15AQI
18AQI
20AQI
19AQI
20AQI
19AQI
26AQI
36AQI
28AQI
30AQI
32AQI
24AQI
25AQI
28AQI
28AQI
21AQI
16AQI
16AQI
18AQI
21AQI
22AQI
29AQI
36AQI
42AQI
40AQI
26AQI
28AQI
27AQI
18AQI
16AQI
18AQI
21AQI
28AQI
24AQI
35AQI
31AQI
23AQI
14AQI
16AQI
20AQI
22AQI
23AQI
22AQI
28AQI
54AQI
60AQI
53AQI
53AQI
56AQI
56AQI
53AQI
55AQI
59AQI
56AQI
58AQI
64AQI
63AQI
86AQI
103AQI
66AQI
53AQI
48AQI
55AQI
53AQI
45AQI
53AQI
40AQI
22AQI
28AQI
32AQI
36AQI
41AQI
52AQI
35AQI
31AQI
47AQI
42AQI
35AQI
17AQI
19AQI
16AQI
20AQI
23AQI
34AQI
50AQI
No. of days
202526AQI
Highest AQI recorded in
September50AQI
Lowest AQI recorded in
May16AQI
Most & Least Polluted Years Over the Last 1 Years
Pomeroy's annual 2025 AQI (26) shows an average percentage change of NaN% (improved AQI) compared to previous years: .