# **Today's Air Quality** - San Diego, 92101, California

### Air Quality Index: 25
**Good**: Air quality is considered satisfactory, and air pollution poses little or no risk.

### Primary Pollutant:
- **O3 (Ozone)**
  - Index: 25
  - Level: Good
  - Concentration: 57.25 µg/m³

- **CO (Carbon Monoxide)**
  - Index: 1
  - Level: Good
  - Concentration: 102.22 µg/m³

- **NO2 (Nitrogen Dioxide)**
  - Index: 1
  - Level: Good
  - Concentration: 1.98 µg/m³

- **PM10 (Particulate matter less than 10 microns)**
  - Index: 9
  - Level: Good
  - Concentration: 10.29 µg/m³

- **PM2.5 (Particulate matter less than 2.5 microns)**
  - Index: 24
  - Level: Good
  - Concentration: 5.08 µg/m³

- **SO2 (Sulfur Dioxide)**
  - Index: 1
  - Level: Good
  - Concentration: 1 µg/m³

## Breathing

**[Read more](/content/2026/07/30/health/breathing/air-quality-alerts-of-northwest-fire-weather/index.html)**

**[Watch Video](/content/2025/06/04/health/breathing/video/one-simple-way-to-protect-your-lungs-this-smoky-summer/index.html)**

**[Watch Video](/content/2026/07/14/health/breathing/video/diy-air-filter-for-dollar-65-and-15-minutes-wildfire-smoke/index.html)**

**[Watch Video](/content/2025/04/23/health/breathing/video/what-to-do-to-protect-your-lungs-from-wildfire-smoke/index.html)**

## Keeping You Healthy

**[Watch Video](/content/2026/08/14/news/weather/video/smoke-air-quality-when-to-open-windows/index.html)**

**[Watch Video](/content/2026/08/07/health/breathing/video/does-allergy-medicine-work-wildfire-smoke-benadryl/index.html)**

**[Watch Video](/content/2026/07/31/health/skin-health/video/best-sunscreen-tips-from-a-dermatologist/index.html)**

**[Watch Video](/content/2026/07/21/health/video/how-weather-can-hurt-your-toenails/index.html)