Bald Hill, Mckinleyville, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Bald Hill, Mckinleyville, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (20th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 26 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Aug - 21st Aug 2025
Bald Hill, Mckinleyville, California, United States
6 AM20th Aug 2025
8 PM
5 AM21st Aug 2025
49AQI
18AQI
21AQI
18AQI
In the last 24 hours,
Bald Hill's AQI reached its highest point of 49 at 11 AM during the Day, while the lowest point, 18, was recorded at 5 AM during the Night between 20th Aug and 21st Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Bald Hill, Mckinleyville, California, United States
20°C14/28°C
21°C12/28°C
20°C15/25°C
20°C13/27°C
18°C10/27°C
18°C9/27°C
19°C10/28°C
19°C12/29°C
21°C11/29°C
20°C12/28°C
20°C11/27°C
19°C12/25°C
17°C13/22°C
17°C13/23°C
18°C9/26°C
18°C10/26°C
21°C15/27°C
23°C15/34°C
27°C17/38°C
27°C19/37°C
26°C15/36°C
25°C18/34°C
22°C14/30°C
19°C11/26°C
18°C11/25°C
18°C16/20°C
17°C16/18°C
17°C14/23°C
18°C9/27°C
20°C11/29°C
--°C/°C
29AQI
24AQI
26AQI
23AQI
2025 Days Vs Air Quality
Bald Hill, Mckinleyville, California, United States
96%
223
4%
9
Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 233 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
Bald Hill, Mckinleyville, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
31AQI
32AQI
24AQI
31AQI
27AQI
28AQI
35AQI
38AQI
41AQI
31AQI
31AQI
31AQI
46AQI
49AQI
49AQI
45AQI
41AQI
51AQI
44AQI
52AQI
54AQI
55AQI
51AQI
35AQI
39AQI
52AQI
57AQI
60AQI
60AQI
42AQI
31AQI
32AQI
36AQI
40AQI
32AQI
40AQI
36AQI
35AQI
34AQI
29AQI
34AQI
44AQI
30AQI
25AQI
27AQI
25AQI
27AQI
33AQI
29AQI
30AQI
36AQI
42AQI
24AQI
26AQI
28AQI
35AQI
40AQI
39AQI
38AQI
24AQI
25AQI
29AQI
24AQI
22AQI
31AQI
37AQI
28AQI
28AQI
35AQI
23AQI
20AQI
22AQI
21AQI
18AQI
17AQI
22AQI
23AQI
21AQI
22AQI
18AQI
26AQI
25AQI
33AQI
32AQI
20AQI
21AQI
25AQI
28AQI
22AQI
23AQI
28AQI
28AQI
30AQI
29AQI
27AQI
16AQI
20AQI
24AQI
23AQI
20AQI
20AQI
26AQI
32AQI
37AQI
30AQI
25AQI
26AQI
25AQI
25AQI
22AQI
24AQI
27AQI
36AQI
25AQI
21AQI
22AQI
22AQI
23AQI
26AQI
28AQI
25AQI
19AQI
20AQI
21AQI
21AQI
24AQI
25AQI
24AQI
21AQI
19AQI
22AQI
18AQI
19AQI
22AQI
20AQI
18AQI
21AQI
19AQI
18AQI
23AQI
20AQI
20AQI
24AQI
24AQI
18AQI
20AQI
27AQI
21AQI
23AQI
27AQI
29AQI
27AQI
24AQI
23AQI
26AQI
25AQI
24AQI
26AQI
28AQI
28AQI
29AQI
32AQI
32AQI
28AQI
27AQI
25AQI
20AQI
19AQI
27AQI
25AQI
23AQI
22AQI
19AQI
25AQI
28AQI
21AQI
18AQI
19AQI
22AQI
25AQI
29AQI
29AQI
25AQI
26AQI
26AQI
28AQI
27AQI
30AQI
32AQI
31AQI
36AQI
35AQI
34AQI
37AQI
39AQI
39AQI
39AQI
40AQI
41AQI
33AQI
32AQI
29AQI
28AQI
27AQI
23AQI
21AQI
19AQI
21AQI
25AQI
29AQI
30AQI
32AQI
29AQI
28AQI
25AQI
26AQI
22AQI
21AQI
22AQI
25AQI
28AQI
33AQI
32AQI
33AQI
28AQI
26AQI
21AQI
18AQI
19AQI
22AQI
26AQI
42AQI
33AQI
25AQI
25AQI
22AQI
25AQI
30AQI
26AQI
No. of days
202529AQI
Highest AQI recorded in
January42AQI
Lowest AQI recorded in
May22AQI
202431AQI
Highest AQI recorded in
December45AQI
Lowest AQI recorded in
May21AQI
202341AQI
Highest AQI recorded in
November45AQI
Lowest AQI recorded in
December41AQI
2020113AQI
Highest AQI recorded in
September143AQI
Lowest AQI recorded in
November21AQI
Most & Least Polluted Years Over the Last 4 Years
Bald Hill's annual 2025 AQI (29) shows an average percentage change of -37.6% (improved AQI) compared to previous years: 2020 (113), 2023 (41), 2024 (31).