Briarpatch, Grass Valley, California, 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
Briarpatch, Grass Valley, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (26th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 31 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 26th Oct - 27th Oct 2025
Briarpatch, Grass Valley, California, United States
7 AM26th Oct 2025
6 PM
6 AM27th Oct 2025
47AQI
22AQI
32AQI
17AQI
In the last 24 hours,
Briarpatch's AQI reached its highest point of 47 at 3 PM during the Day, while the lowest point, 17, was recorded at 2 AM during the Night between 26th Oct and 27th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Briarpatch, Grass Valley, California, United States
23°C17/32°C
17°C13/23°C
16°C13/21°C
16°C13/21°C
16°C13/23°C
14°C12/16°C
14°C12/18°C
16°C11/24°C
18°C12/26°C
21°C15/29°C
22°C16/31°C
20°C14/29°C
16°C12/23°C
15°C10/22°C
14°C9/20°C
15°C9/23°C
12°C9/16°C
9°C8/11°C
10°C7/14°C
12°C6/19°C
15°C9/23°C
17°C11/26°C
18°C13/26°C
19°C13/28°C
20°C14/29°C
16°C12/21°C
15°C10/23°C
15°C10/23°C
12°C10/14°C
12°C11/15°C
--°C/°C
44AQI
37AQI
47AQI
42AQI
2025 Days Vs Air Quality
Briarpatch, Grass Valley, California, United States
93%
200
7%
15
Total number of days with different AQI categories in last 300 days in 2025 (65 days remaining)
Under WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2025, 93% of 300 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
Briarpatch, Grass Valley, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
35AQI
25AQI
28AQI
24AQI
29AQI
26AQI
21AQI
19AQI
21AQI
21AQI
17AQI
26AQI
20AQI
21AQI
21AQI
22AQI
27AQI
26AQI
27AQI
24AQI
32AQI
35AQI
32AQI
31AQI
24AQI
29AQI
26AQI
38AQI
31AQI
39AQI
31AQI
38AQI
24AQI
20AQI
29AQI
38AQI
25AQI
30AQI
29AQI
21AQI
17AQI
17AQI
26AQI
36AQI
31AQI
26AQI
23AQI
23AQI
25AQI
21AQI
18AQI
21AQI
29AQI
28AQI
21AQI
17AQI
22AQI
24AQI
23AQI
31AQI
31AQI
23AQI
24AQI
31AQI
33AQI
36AQI
39AQI
32AQI
30AQI
43AQI
39AQI
37AQI
38AQI
41AQI
41AQI
35AQI
42AQI
41AQI
40AQI
40AQI
37AQI
36AQI
35AQI
38AQI
36AQI
30AQI
37AQI
34AQI
30AQI
26AQI
29AQI
34AQI
38AQI
43AQI
43AQI
44AQI
42AQI
37AQI
39AQI
41AQI
30AQI
28AQI
28AQI
27AQI
31AQI
30AQI
37AQI
54AQI
59AQI
61AQI
53AQI
48AQI
41AQI
38AQI
39AQI
35AQI
34AQI
29AQI
24AQI
22AQI
24AQI
25AQI
24AQI
26AQI
25AQI
31AQI
32AQI
37AQI
35AQI
34AQI
36AQI
35AQI
37AQI
29AQI
32AQI
35AQI
35AQI
38AQI
42AQI
51AQI
36AQI
33AQI
35AQI
36AQI
24AQI
20AQI
23AQI
25AQI
25AQI
35AQI
42AQI
46AQI
40AQI
40AQI
38AQI
38AQI
26AQI
30AQI
35AQI
27AQI
38AQI
37AQI
40AQI
39AQI
39AQI
32AQI
22AQI
21AQI
22AQI
20AQI
24AQI
34AQI
34AQI
27AQI
29AQI
28AQI
29AQI
32AQI
32AQI
29AQI
28AQI
26AQI
28AQI
38AQI
42AQI
39AQI
34AQI
24AQI
21AQI
34AQI
37AQI
31AQI
48AQI
49AQI
51AQI
56AQI
51AQI
51AQI
44AQI
39AQI
45AQI
47AQI
40AQI
35AQI
46AQI
52AQI
54AQI
51AQI
44AQI
42AQI
51AQI
53AQI
55AQI
41AQI
31AQI
28AQI
27AQI
26AQI
37AQI
35AQI
34AQI
31AQI
45AQI
No. of days
202533AQI
Highest AQI recorded in
October45AQI
Lowest AQI recorded in
May26AQI
Most & Least Polluted Years Over the Last 1 Years
Briarpatch's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .