South 1st Street, El Cajon, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
South 1st Street, El Cajon, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th July):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 51 of Moderate air quality on the same day.
Day & Night AQI Trend: 16th Jul - 17th Jul 2026
South 1st Street, El Cajon, California, United States
5 AM16th Jul 2026
7 PM
4 AM17th Jul 2026
44AQI
27AQI
51AQI
28AQI
In the last 24 hours,
South 1st Street's AQI reached its highest point of 51 at 4 AM during the Night, while the lowest point, 27, was recorded at 7 AM during the Day between 16th Jul and 17th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
South 1st Street, El Cajon, California, United States
20°C17/28°C
21°C16/29°C
20°C15/29°C
20°C14/30°C
21°C16/30°C
22°C16/32°C
22°C16/32°C
22°C17/31°C
21°C16/29°C
20°C15/25°C
19°C16/25°C
20°C14/25°C
20°C16/28°C
21°C17/29°C
22°C17/31°C
23°C15/34°C
23°C15/35°C
24°C17/33°C
24°C16/34°C
23°C15/33°C
24°C16/37°C
22°C16/32°C
21°C15/31°C
23°C17/30°C
23°C17/33°C
25°C18/34°C
26°C19/37°C
28°C19/40°C
25°C19/34°C
25°C19/32°C
33AQI
23AQI
37AQI
24AQI
2026 Days Vs Air Quality
South 1st Street, El Cajon, California, United States
96%
187
4%
8
Total number of days with different AQI categories in last 198 days in 2026 (167 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 198 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
South 1st Street, El Cajon, California, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI (US)
16AQI (US)
14AQI (US)
12AQI (US)
19AQI (US)
25AQI (US)
28AQI (US)
30AQI (US)
25AQI (US)
27AQI (US)
35AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
26AQI (US)
34AQI (US)
29AQI (US)
33AQI (US)
43AQI (US)
45AQI (US)
61AQI (US)
41AQI (US)
34AQI (US)
25AQI (US)
27AQI (US)
35AQI (US)
23AQI (US)
30AQI (US)
39AQI (US)
49AQI (US)
29AQI (US)
39AQI (US)
37AQI (US)
33AQI (US)
29AQI (US)
41AQI (US)
41AQI (US)
38AQI (US)
29AQI (US)
35AQI (US)
38AQI (US)
23AQI (US)
22AQI (US)
29AQI (US)
34AQI (US)
38AQI (US)
36AQI (US)
28AQI (US)
29AQI (US)
28AQI (US)
23AQI (US)
23AQI (US)
27AQI (US)
29AQI (US)
30AQI (US)
29AQI (US)
25AQI (US)
26AQI (US)
24AQI (US)
28AQI (US)
42AQI (US)
22AQI (US)
32AQI (US)
23AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
25AQI (US)
23AQI (US)
25AQI (US)
25AQI (US)
26AQI (US)
32AQI (US)
32AQI (US)
27AQI (US)
25AQI (US)
35AQI (US)
39AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
19AQI (US)
19AQI (US)
26AQI (US)
23AQI (US)
21AQI (US)
15AQI (US)
20AQI (US)
27AQI (US)
25AQI (US)
32AQI (US)
30AQI (US)
35AQI (US)
25AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
19AQI (US)
19AQI (US)
30AQI (US)
20AQI (US)
29AQI (US)
29AQI (US)
22AQI (US)
17AQI (US)
18AQI (US)
16AQI (US)
21AQI (US)
29AQI (US)
16AQI (US)
19AQI (US)
22AQI (US)
24AQI (US)
31AQI (US)
30AQI (US)
23AQI (US)
29AQI (US)
30AQI (US)
28AQI (US)
29AQI (US)
38AQI (US)
33AQI (US)
36AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
49AQI (US)
47AQI (US)
60AQI (US)
58AQI (US)
55AQI (US)
58AQI (US)
45AQI (US)
55AQI (US)
50AQI (US)
45AQI (US)
38AQI (US)
23AQI (US)
13AQI (US)
14AQI (US)
22AQI (US)
20AQI (US)
20AQI (US)
29AQI (US)
38AQI (US)
41AQI (US)
37AQI (US)
27AQI (US)
22AQI (US)
32AQI (US)
30AQI (US)
26AQI (US)
23AQI (US)
23AQI (US)
19AQI (US)
14AQI (US)
16AQI (US)
20AQI (US)
22AQI (US)
24AQI (US)
21AQI (US)
25AQI (US)
19AQI (US)
29AQI (US)
20AQI (US)
32AQI (US)
25AQI (US)
21AQI (US)
23AQI (US)
21AQI (US)
17AQI (US)
21AQI (US)
22AQI (US)
18AQI (US)
32AQI (US)
18AQI (US)
21AQI (US)
36AQI (US)
24AQI (US)
55AQI (US)
29AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
25AQI (US)
34AQI (US)
29AQI (US)
29AQI (US)
32AQI (US)
51AQI (US)
30AQI (US)
31AQI (US)
26AQI (US)
23AQI (US)
36AQI (US)
25AQI (US)
31AQI (US)
No. of days
202629AQI (US)
Highest AQI (US) recorded in
May36AQI (US)
Lowest AQI (US) recorded in
April23AQI (US)
202544AQI (US)
Highest AQI (US) recorded in
December53AQI (US)
Lowest AQI (US) recorded in
March28AQI (US)
Most & Least Polluted Years Over the Last 2 Years
South 1st Street's annual 2026 AQI (US) (29) shows an average percentage change of -34.09% (improved AQI (US)) compared to previous years: 2025 (44).