Grass Valley Litton Building, 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
Grass Valley Litton Building, Grass Valley, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (26th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 33 of Good air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 26th Oct - 27th Oct 2025
Grass Valley Litton Building, Grass Valley, California, United States
7 AM26th Oct 2025
6 PM
6 AM27th Oct 2025
42AQI
22AQI
47AQI
20AQI
In the last 24 hours,
Grass Valley Litton Building's AQI reached its highest point of 47 at 1 AM during the Night, while the lowest point, 20, was recorded at 6 AM during the Night between 26th Oct and 27th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Grass Valley Litton Building, 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
47AQI
39AQI
41AQI
38AQI
2025 Days Vs Air Quality
Grass Valley Litton Building, Grass Valley, California, United States
95%
284
5%
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: 95%
Health Risk Level:
Very Low
In 2025, 95% 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
Grass Valley Litton Building, Grass Valley, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
29AQI
31AQI
26AQI
27AQI
24AQI
34AQI
28AQI
30AQI
29AQI
33AQI
28AQI
28AQI
30AQI
37AQI
31AQI
35AQI
43AQI
46AQI
33AQI
31AQI
32AQI
33AQI
33AQI
36AQI
28AQI
31AQI
40AQI
52AQI
57AQI
47AQI
24AQI
25AQI
24AQI
27AQI
27AQI
27AQI
36AQI
27AQI
29AQI
30AQI
32AQI
34AQI
29AQI
28AQI
28AQI
29AQI
29AQI
28AQI
28AQI
28AQI
30AQI
30AQI
29AQI
28AQI
28AQI
31AQI
34AQI
32AQI
31AQI
27AQI
26AQI
30AQI
29AQI
26AQI
28AQI
30AQI
29AQI
31AQI
33AQI
29AQI
21AQI
17AQI
26AQI
30AQI
16AQI
18AQI
20AQI
20AQI
20AQI
18AQI
21AQI
22AQI
22AQI
22AQI
23AQI
24AQI
22AQI
27AQI
23AQI
20AQI
20AQI
21AQI
21AQI
18AQI
25AQI
19AQI
19AQI
20AQI
21AQI
25AQI
24AQI
27AQI
24AQI
30AQI
33AQI
29AQI
29AQI
23AQI
28AQI
25AQI
34AQI
28AQI
36AQI
29AQI
34AQI
23AQI
20AQI
27AQI
35AQI
23AQI
28AQI
27AQI
20AQI
18AQI
18AQI
25AQI
33AQI
29AQI
25AQI
21AQI
21AQI
23AQI
20AQI
19AQI
21AQI
26AQI
25AQI
21AQI
17AQI
21AQI
22AQI
23AQI
30AQI
30AQI
23AQI
23AQI
29AQI
31AQI
34AQI
38AQI
30AQI
30AQI
41AQI
36AQI
35AQI
36AQI
38AQI
39AQI
32AQI
39AQI
40AQI
40AQI
45AQI
42AQI
40AQI
38AQI
39AQI
37AQI
30AQI
35AQI
32AQI
30AQI
25AQI
27AQI
32AQI
38AQI
43AQI
45AQI
46AQI
44AQI
37AQI
37AQI
40AQI
31AQI
29AQI
28AQI
27AQI
30AQI
29AQI
35AQI
53AQI
59AQI
62AQI
54AQI
50AQI
44AQI
37AQI
38AQI
37AQI
38AQI
30AQI
24AQI
22AQI
22AQI
24AQI
24AQI
25AQI
24AQI
29AQI
31AQI
36AQI
35AQI
34AQI
36AQI
35AQI
37AQI
29AQI
31AQI
35AQI
36AQI
38AQI
42AQI
51AQI
37AQI
33AQI
35AQI
36AQI
25AQI
20AQI
23AQI
25AQI
25AQI
34AQI
41AQI
46AQI
40AQI
40AQI
38AQI
38AQI
26AQI
30AQI
35AQI
28AQI
38AQI
36AQI
40AQI
39AQI
39AQI
32AQI
22AQI
21AQI
22AQI
20AQI
24AQI
34AQI
34AQI
28AQI
29AQI
28AQI
28AQI
32AQI
31AQI
30AQI
29AQI
29AQI
28AQI
38AQI
41AQI
32AQI
29AQI
24AQI
22AQI
21AQI
41AQI
29AQI
33AQI
50AQI
52AQI
42AQI
55AQI
51AQI
49AQI
36AQI
40AQI
44AQI
47AQI
37AQI
34AQI
51AQI
54AQI
51AQI
49AQI
35AQI
40AQI
53AQI
57AQI
47AQI
33AQI
34AQI
29AQI
25AQI
26AQI
25AQI
37AQI
35AQI
34AQI
30AQI
44AQI
No. of days
202532AQI
Highest AQI recorded in
October44AQI
Lowest AQI recorded in
March25AQI
202433AQI
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
January22AQI
202338AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
December27AQI
202236AQI
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
March28AQI
202139AQI
Highest AQI recorded in
August100AQI
Lowest AQI recorded in
January26AQI
202049AQI
Highest AQI recorded in
September107AQI
Lowest AQI recorded in
March26AQI
Most & Least Polluted Years Over the Last 6 Years
Grass Valley Litton Building's annual 2025 AQI (32) shows an average percentage change of -17.3% (improved AQI) compared to previous years: 2020 (49), 2021 (39), 2022 (36), 2023 (38), 2024 (33).