Air Quality in San Diego, California
71
Median AQI (2024)
161
Max AQI (2024)
→ stable
10-Year Trend
Ozone
Primary Pollutant
47
Good Days (2024)
25
Monitoring Stations
AQI Trend (Median)
Air Quality Days by Category
Annual Summary
| Year | Median AQI | Max AQI | Good Days | Moderate Days | Unhealthy Days | Ozone Days | PM2.5 Days |
|---|---|---|---|---|---|---|---|
| 2024 | 71 | 161 | 47 | 267 | 52 | 202 | 151 |
| 2023 | 67 | 150 | 61 | 260 | 44 | 185 | 151 |
| 2022 | 63 | 156 | 42 | 297 | 26 | 150 | 190 |
| 2021 | 67 | 133 | 52 | 297 | 16 | 163 | 199 |
| 2020 | 74 | 192 | 33 | 284 | 49 | 100 | 263 |
| 2019 | 66 | 169 | 38 | 302 | 25 | 133 | 228 |
| 2018 | 67 | 143 | 28 | 302 | 35 | 162 | 203 |
| 2017 | 68 | 174 | 41 | 262 | 62 | 203 | 162 |
| 2016 | 68 | 164 | 30 | 294 | 42 | 176 | 188 |
| 2015 | 65 | 156 | 46 | 278 | 41 | 160 | 202 |
Recent Daily AQI
| Date | AQI | Category | Primary Pollutant |
|---|---|---|---|
| Dec 31, 2024 | 77 | Moderate | PM2.5 |
| Dec 30, 2024 | 68 | Moderate | PM2.5 |
| Dec 29, 2024 | 80 | Moderate | PM2.5 |
| Dec 28, 2024 | 69 | Moderate | PM2.5 |
| Dec 27, 2024 | 85 | Moderate | PM2.5 |
| Dec 26, 2024 | 81 | Moderate | PM2.5 |
| Dec 25, 2024 | 75 | Moderate | PM2.5 |
| Dec 24, 2024 | 59 | Moderate | PM2.5 |
| Dec 23, 2024 | 77 | Moderate | PM2.5 |
| Dec 22, 2024 | 115 | Unhealthy for Sensitive Groups | PM2.5 |
| Dec 21, 2024 | 86 | Moderate | PM2.5 |
| Dec 20, 2024 | 92 | Moderate | PM2.5 |
| Dec 19, 2024 | 77 | Moderate | PM2.5 |
| Dec 18, 2024 | 65 | Moderate | PM2.5 |
| Dec 17, 2024 | 109 | Unhealthy for Sensitive Groups | PM2.5 |
| Dec 16, 2024 | 74 | Moderate | PM2.5 |
| Dec 15, 2024 | 69 | Moderate | PM2.5 |
| Dec 14, 2024 | 86 | Moderate | PM2.5 |
| Dec 13, 2024 | 61 | Moderate | PM2.5 |
| Dec 12, 2024 | 71 | Moderate | PM2.5 |
| Dec 11, 2024 | 54 | Moderate | PM2.5 |
| Dec 10, 2024 | 88 | Moderate | PM10 |
| Dec 9, 2024 | 104 | Unhealthy for Sensitive Groups | PM2.5 |
| Dec 8, 2024 | 95 | Moderate | PM2.5 |
| Dec 7, 2024 | 110 | Unhealthy for Sensitive Groups | PM2.5 |
| Dec 6, 2024 | 125 | Unhealthy for Sensitive Groups | PM2.5 |
| Dec 5, 2024 | 115 | Unhealthy for Sensitive Groups | PM2.5 |
| Dec 4, 2024 | 86 | Moderate | PM2.5 |
| Dec 3, 2024 | 81 | Moderate | PM2.5 |
| Dec 2, 2024 | 88 | Moderate | PM2.5 |
| Dec 1, 2024 | 95 | Moderate | PM2.5 |
| Nov 30, 2024 | 57 | Moderate | PM2.5 |
| Nov 29, 2024 | 58 | Moderate | PM10 |
| Nov 28, 2024 | 66 | Moderate | PM2.5 |
| Nov 27, 2024 | 64 | Moderate | PM2.5 |
| Nov 26, 2024 | 79 | Moderate | PM2.5 |
| Nov 25, 2024 | 62 | Moderate | PM2.5 |
| Nov 24, 2024 | 67 | Moderate | PM2.5 |
| Nov 23, 2024 | 72 | Moderate | PM2.5 |
| Nov 22, 2024 | 87 | Moderate | PM2.5 |
| Nov 21, 2024 | 85 | Moderate | PM2.5 |
| Nov 20, 2024 | 67 | Moderate | Ozone |
| Nov 19, 2024 | 71 | Moderate | PM2.5 |
| Nov 18, 2024 | 74 | Moderate | PM2.5 |
| Nov 17, 2024 | 74 | Moderate | PM2.5 |
| Nov 16, 2024 | 52 | Moderate | PM2.5 |
| Nov 15, 2024 | 51 | Moderate | PM2.5 |
| Nov 14, 2024 | 71 | Moderate | PM2.5 |
| Nov 13, 2024 | 63 | Moderate | PM10 |
| Nov 12, 2024 | 69 | Moderate | PM2.5 |
| Nov 11, 2024 | 90 | Moderate | PM2.5 |
| Nov 10, 2024 | 99 | Moderate | PM2.5 |
| Nov 9, 2024 | 80 | Moderate | PM2.5 |
| Nov 8, 2024 | 55 | Moderate | PM10 |
| Nov 7, 2024 | 53 | Moderate | PM10 |
| Nov 6, 2024 | 83 | Moderate | PM10 |
| Nov 5, 2024 | 68 | Moderate | PM10 |
| Nov 4, 2024 | 68 | Moderate | PM2.5 |
| Nov 3, 2024 | 53 | Moderate | PM2.5 |
| Nov 2, 2024 | 55 | Moderate | PM2.5 |
| Nov 1, 2024 | 72 | Moderate | PM2.5 |
| Oct 31, 2024 | 77 | Moderate | PM10 |
| Oct 30, 2024 | 60 | Moderate | PM10 |
| Oct 29, 2024 | 48 | Good | PM2.5 |
| Oct 28, 2024 | 65 | Moderate | PM2.5 |
| Oct 27, 2024 | 87 | Moderate | Ozone |
| Oct 26, 2024 | 112 | Unhealthy for Sensitive Groups | Ozone |
| Oct 25, 2024 | 115 | Unhealthy for Sensitive Groups | Ozone |
| Oct 24, 2024 | 126 | Unhealthy for Sensitive Groups | Ozone |
| Oct 23, 2024 | 126 | Unhealthy for Sensitive Groups | Ozone |
| Oct 22, 2024 | 95 | Moderate | PM10 |
| Oct 21, 2024 | 74 | Moderate | PM10 |
| Oct 20, 2024 | 71 | Moderate | Ozone |
| Oct 19, 2024 | 82 | Moderate | PM10 |
| Oct 18, 2024 | 60 | Moderate | PM2.5 |
| Oct 17, 2024 | 58 | Moderate | PM2.5 |
| Oct 16, 2024 | 77 | Moderate | Ozone |
| Oct 15, 2024 | 67 | Moderate | Ozone |
| Oct 14, 2024 | 71 | Moderate | Ozone |
| Oct 13, 2024 | 71 | Moderate | Ozone |
| Oct 12, 2024 | 80 | Moderate | PM2.5 |
| Oct 11, 2024 | 87 | Moderate | PM2.5 |
| Oct 10, 2024 | 105 | Unhealthy for Sensitive Groups | Ozone |
| Oct 9, 2024 | 77 | Moderate | Ozone |
| Oct 8, 2024 | 87 | Moderate | Ozone |
| Oct 7, 2024 | 97 | Moderate | Ozone |
| Oct 6, 2024 | 119 | Unhealthy for Sensitive Groups | Ozone |
| Oct 5, 2024 | 133 | Unhealthy for Sensitive Groups | Ozone |
| Oct 4, 2024 | 108 | Unhealthy for Sensitive Groups | Ozone |
| Oct 3, 2024 | 97 | Moderate | Ozone |
Monitoring Stations
Church Rd.
97 CROSS RD
10TH AVENUE MARINE TERMINAL
Alpine
Caltrans-Chavez
Camp Pendleton
Campo Indian Reservation
Chula Vista
Donovan
El Cajon - Lexington Elementary School
Fire Station #19
Imperial Beach Civic Center
LJA1
La Posta Band of Indians
La Posta Reservation
Manzanita Reservation
NESTOR - BERRY ELEMENTARY SCHOOL
Pala Airpad
Palomar Airport
Rincon Daycare Site ("RIIR")
Frequently Asked Questions
What is the air quality in San Diego, California?
Based on EPA data from 2024, San Diego has a median Air Quality Index (AQI) of 71, which is classified as "Moderate." The primary pollutant is Ozone. Over the past 10 years, air quality has been stable.
Is San Diego a good place to live for air quality?
San Diego has a 10-year average median AQI of 67. In 2024, there were 47 days with "Good" air quality and 52 days with unhealthy conditions. Unusually sensitive individuals should consider reducing prolonged outdoor exertion.
What pollutants affect San Diego the most?
The primary pollutant driving the AQI in San Diego is Ozone. This is monitored by 25 active EPA stations in the county. Other pollutants tracked include ozone, PM10, nitrogen dioxide, sulfur dioxide, and carbon monoxide.
How many air quality monitoring stations are in San Diego?
There are 25 active EPA monitoring stations in San Diego, California. These stations continuously measure pollutant levels and contribute to the daily AQI calculations.