Portola Avenue, Livermore, 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
Portola Avenue, Livermore, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (30th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 40 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 30th Oct - 31st Oct 2025
Portola Avenue, Livermore, California, United States
7 AM30th Oct 2025
6 PM
6 AM31st Oct 2025
53AQI
22AQI
54AQI
46AQI
In the last 24 hours,
Portola Avenue's AQI reached its highest point of 54 at 9 PM during the Night, while the lowest point, 22, was recorded at 8 AM during the Day between 30th Oct and 31st Oct 2025.
Day & Night AQI Trend : Oct 2025
Portola Avenue, Livermore, California, United States
20°C17/26°C
19°C16/23°C
17°C14/21°C
18°C12/27°C
19°C12/29°C
21°C13/31°C
22°C14/34°C
18°C14/24°C
17°C13/23°C
17°C12/25°C
16°C11/23°C
16°C10/25°C
13°C10/18°C
12°C10/17°C
13°C11/16°C
14°C8/21°C
16°C10/25°C
18°C11/27°C
18°C12/26°C
19°C12/29°C
19°C12/29°C
15°C13/21°C
15°C10/23°C
15°C11/23°C
15°C12/18°C
16°C13/22°C
15°C11/23°C
17°C10/27°C
19°C12/30°C
14°C9/19°C
--°C/°C
39AQI
32AQI
48AQI
37AQI
2025 Days Vs Air Quality
Portola Avenue, Livermore, California, United States
96%
211
4%
8
Total number of days with different AQI categories in last 304 days in 2025 (61 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 304 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
Portola Avenue, Livermore, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI
22AQI
29AQI
22AQI
24AQI
21AQI
23AQI
22AQI
29AQI
25AQI
27AQI
26AQI
22AQI
19AQI
27AQI
34AQI
24AQI
37AQI
38AQI
38AQI
40AQI
41AQI
37AQI
37AQI
41AQI
39AQI
39AQI
46AQI
49AQI
46AQI
27AQI
21AQI
25AQI
33AQI
38AQI
46AQI
47AQI
36AQI
27AQI
37AQI
33AQI
44AQI
45AQI
25AQI
28AQI
23AQI
22AQI
20AQI
16AQI
20AQI
19AQI
24AQI
25AQI
29AQI
38AQI
31AQI
38AQI
38AQI
25AQI
29AQI
23AQI
19AQI
23AQI
30AQI
23AQI
32AQI
41AQI
46AQI
51AQI
37AQI
51AQI
44AQI
34AQI
32AQI
25AQI
21AQI
28AQI
48AQI
47AQI
45AQI
40AQI
43AQI
41AQI
33AQI
32AQI
44AQI
41AQI
38AQI
33AQI
35AQI
27AQI
28AQI
26AQI
33AQI
37AQI
31AQI
25AQI
27AQI
27AQI
40AQI
30AQI
33AQI
24AQI
25AQI
22AQI
21AQI
28AQI
45AQI
45AQI
35AQI
25AQI
24AQI
24AQI
20AQI
21AQI
23AQI
23AQI
25AQI
15AQI
15AQI
16AQI
16AQI
15AQI
16AQI
19AQI
24AQI
21AQI
26AQI
25AQI
22AQI
24AQI
32AQI
27AQI
30AQI
26AQI
28AQI
38AQI
33AQI
32AQI
34AQI
31AQI
28AQI
34AQI
23AQI
17AQI
23AQI
28AQI
31AQI
43AQI
48AQI
42AQI
33AQI
34AQI
40AQI
41AQI
45AQI
39AQI
34AQI
29AQI
35AQI
46AQI
36AQI
37AQI
31AQI
31AQI
23AQI
23AQI
23AQI
21AQI
24AQI
32AQI
30AQI
22AQI
24AQI
34AQI
37AQI
36AQI
43AQI
37AQI
31AQI
30AQI
37AQI
41AQI
39AQI
49AQI
54AQI
25AQI
21AQI
20AQI
29AQI
36AQI
41AQI
50AQI
49AQI
59AQI
45AQI
56AQI
48AQI
42AQI
37AQI
36AQI
48AQI
33AQI
32AQI
42AQI
51AQI
58AQI
51AQI
31AQI
48AQI
43AQI
42AQI
40AQI
25AQI
31AQI
31AQI
31AQI
35AQI
40AQI
24AQI
33AQI
29AQI
37AQI
25AQI
32AQI
32AQI
41AQI
No. of days
202533AQI
Highest AQI recorded in
October41AQI
Lowest AQI recorded in
March24AQI
Most & Least Polluted Years Over the Last 1 Years
Portola Avenue's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .