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
El Cajon, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (31st July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 49 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
2025 Days Vs Air Quality
El Cajon, California, United States
79%
167
21%
45
Total number of days with different AQI categories in last 213 days in 2025 (152 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2025, 79% of 213 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
El Cajon, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
90AQI
68AQI
64AQI
62AQI
54AQI
46AQI
47AQI
49AQI
43AQI
36AQI
48AQI
50AQI
40AQI
36AQI
37AQI
42AQI
40AQI
48AQI
60AQI
55AQI
43AQI
43AQI
39AQI
52AQI
71AQI
31AQI
31AQI
39AQI
39AQI
45AQI
54AQI
66AQI
58AQI
48AQI
58AQI
35AQI
28AQI
26AQI
28AQI
42AQI
45AQI
33AQI
36AQI
25AQI
32AQI
31AQI
38AQI
44AQI
50AQI
46AQI
49AQI
45AQI
46AQI
42AQI
39AQI
48AQI
55AQI
49AQI
34AQI
34AQI
37AQI
32AQI
32AQI
40AQI
33AQI
31AQI
31AQI
37AQI
35AQI
33AQI
28AQI
22AQI
19AQI
26AQI
36AQI
50AQI
28AQI
24AQI
23AQI
33AQI
42AQI
56AQI
54AQI
57AQI
31AQI
20AQI
27AQI
39AQI
39AQI
22AQI
24AQI
31AQI
29AQI
21AQI
23AQI
25AQI
25AQI
37AQI
39AQI
40AQI
48AQI
53AQI
53AQI
53AQI
41AQI
33AQI
23AQI
23AQI
28AQI
36AQI
47AQI
50AQI
41AQI
38AQI
35AQI
21AQI
23AQI
21AQI
37AQI
49AQI
45AQI
28AQI
35AQI
27AQI
26AQI
36AQI
42AQI
45AQI
48AQI
45AQI
49AQI
52AQI
28AQI
30AQI
47AQI
52AQI
42AQI
26AQI
38AQI
46AQI
49AQI
56AQI
59AQI
56AQI
49AQI
47AQI
45AQI
40AQI
38AQI
45AQI
54AQI
47AQI
41AQI
31AQI
26AQI
26AQI
24AQI
28AQI
32AQI
42AQI
45AQI
46AQI
50AQI
58AQI
54AQI
53AQI
57AQI
60AQI
62AQI
59AQI
55AQI
61AQI
61AQI
57AQI
59AQI
53AQI
49AQI
49AQI
46AQI
45AQI
36AQI
38AQI
38AQI
38AQI
40AQI
58AQI
53AQI
55AQI
55AQI
46AQI
43AQI
55AQI
53AQI
46AQI
40AQI
35AQI
31AQI
24AQI
24AQI
35AQI
42AQI
36AQI
25AQI
24AQI
28AQI
23AQI
21AQI
23AQI
27AQI
34AQI
43AQI
49AQI
48AQI
42AQI
34AQI
35AQI
43AQI
47AQI
38AQI
No. of days
202541AQI
Highest AQI recorded in
January48AQI
Lowest AQI recorded in
March34AQI
202441AQI
Highest AQI recorded in
December53AQI
Lowest AQI recorded in
March31AQI
202348AQI
Highest AQI recorded in
January82AQI
Lowest AQI recorded in
May37AQI
202278AQI
Highest AQI recorded in
June169AQI
Lowest AQI recorded in
March40AQI
202144AQI
Highest AQI recorded in
December51AQI
Lowest AQI recorded in
March35AQI
202047AQI
Highest AQI recorded in
September63AQI
Lowest AQI recorded in
May27AQI
Most & Least Polluted Years Over the Last 6 Years
El Cajon's annual 2025 AQI (41) shows an average percentage change of -16.5% (improved AQI) compared to previous years: 2020 (47), 2021 (44), 2022 (78), 2023 (48), 2024 (41).
