Colville, Washington, 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
Colville, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (31st October ):
On this day, AQI across the 4 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: 30th Sep - 1st Oct 2025
Colville, Washington, United States
6 AM30th Sep 2025
7 PM
5 AM1st Oct 2025
41AQI
15AQI
20AQI
13AQI
In the last 24 hours,
Colville's AQI reached its highest point of 41 at 2 PM during the Day, while the lowest point, 13, was recorded at 5 AM during the Night between 30th Sep and 1st Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Colville, Washington, United States
--°C/°C
29°C21/37°C
29°C20/37°C
26°C21/33°C
25°C19/31°C
26°C19/32°C
23°C18/30°C
22°C14/28°C
21°C14/28°C
21°C13/30°C
22°C14/30°C
20°C13/26°C
21°C14/28°C
17°C13/23°C
14°C11/19°C
19°C11/27°C
21°C13/29°C
21°C13/29°C
21°C14/30°C
22°C14/28°C
17°C13/23°C
12°C7/20°C
15°C5/25°C
17°C6/27°C
17°C7/27°C
15°C7/23°C
15°C9/24°C
16°C6/26°C
16°C10/25°C
15°C11/20°C
14°C10/19°C
68AQI
62AQI
67AQI
62AQI
2025 Days Vs Air Quality
Colville, Washington, United States
87%
237
12%
32
1%
4
Total number of days with different AQI categories in last 275 days in 2025 (90 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 275 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
Colville, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
49AQI
48AQI
25AQI
30AQI
32AQI
25AQI
27AQI
27AQI
24AQI
32AQI
27AQI
34AQI
35AQI
30AQI
35AQI
32AQI
33AQI
39AQI
36AQI
38AQI
45AQI
51AQI
55AQI
51AQI
37AQI
43AQI
52AQI
52AQI
55AQI
58AQI
59AQI
22AQI
28AQI
28AQI
22AQI
27AQI
30AQI
31AQI
33AQI
38AQI
34AQI
40AQI
40AQI
46AQI
27AQI
24AQI
38AQI
45AQI
43AQI
40AQI
38AQI
24AQI
26AQI
21AQI
21AQI
20AQI
30AQI
35AQI
47AQI
42AQI
42AQI
55AQI
46AQI
27AQI
36AQI
26AQI
26AQI
33AQI
21AQI
24AQI
20AQI
19AQI
22AQI
18AQI
16AQI
20AQI
21AQI
31AQI
16AQI
15AQI
14AQI
16AQI
19AQI
20AQI
37AQI
21AQI
16AQI
15AQI
20AQI
18AQI
16AQI
18AQI
19AQI
21AQI
20AQI
21AQI
22AQI
11AQI
12AQI
21AQI
16AQI
24AQI
17AQI
22AQI
28AQI
26AQI
19AQI
18AQI
18AQI
13AQI
13AQI
15AQI
20AQI
21AQI
39AQI
28AQI
28AQI
19AQI
13AQI
13AQI
22AQI
35AQI
34AQI
12AQI
12AQI
15AQI
18AQI
15AQI
15AQI
16AQI
16AQI
14AQI
14AQI
15AQI
14AQI
12AQI
12AQI
12AQI
12AQI
11AQI
11AQI
12AQI
12AQI
15AQI
19AQI
15AQI
13AQI
15AQI
21AQI
13AQI
16AQI
14AQI
12AQI
14AQI
15AQI
19AQI
19AQI
17AQI
16AQI
22AQI
18AQI
23AQI
37AQI
20AQI
16AQI
16AQI
16AQI
21AQI
22AQI
16AQI
17AQI
12AQI
12AQI
20AQI
38AQI
31AQI
18AQI
14AQI
14AQI
15AQI
16AQI
21AQI
26AQI
19AQI
17AQI
30AQI
16AQI
18AQI
19AQI
17AQI
17AQI
39AQI
24AQI
22AQI
50AQI
22AQI
23AQI
32AQI
28AQI
40AQI
32AQI
29AQI
25AQI
30AQI
33AQI
21AQI
16AQI
15AQI
16AQI
18AQI
29AQI
27AQI
38AQI
37AQI
37AQI
31AQI
32AQI
30AQI
17AQI
15AQI
16AQI
19AQI
20AQI
21AQI
31AQI
23AQI
30AQI
15AQI
17AQI
17AQI
19AQI
25AQI
25AQI
34AQI
35AQI
36AQI
41AQI
52AQI
58AQI
56AQI
55AQI
50AQI
67AQI
70AQI
82AQI
90AQI
119AQI
125AQI
150AQI
113AQI
90AQI
67AQI
65AQI
62AQI
77AQI
72AQI
59AQI
31AQI
32AQI
52AQI
52AQI
52AQI
61AQI
53AQI
23AQI
33AQI
33AQI
43AQI
36AQI
74AQI
84AQI
57AQI
30AQI
39AQI
32AQI
25AQI
20AQI
16AQI
19AQI
25AQI
32AQI
66AQI
No. of days
202530AQI
Highest AQI recorded in
September66AQI
Lowest AQI recorded in
May16AQI
202431AQI
Highest AQI recorded in
January41AQI
Lowest AQI recorded in
June18AQI
202339AQI
Highest AQI recorded in
August62AQI
Lowest AQI recorded in
September23AQI
202237AQI
Highest AQI recorded in
November58AQI
Lowest AQI recorded in
May13AQI
202141AQI
Highest AQI recorded in
August79AQI
Lowest AQI recorded in
May18AQI
202038AQI
Highest AQI recorded in
September94AQI
Lowest AQI recorded in
June18AQI
Most & Least Polluted Years Over the Last 6 Years
Colville's annual 2025 AQI (30) shows an average percentage change of -17.4% (improved AQI) compared to previous years: 2020 (38), 2021 (41), 2022 (37), 2023 (39), 2024 (31).