Understanding Air Quality Index (AQI) Categories

The Air Quality Index (AQI) is a standardized system used to communicate the quality of air in a specific area and its potential health impacts. Developed by the U.S. Environmental Protection Agency (EPA), the AQI ranges from 0 to 500, with higher values indicating poorer air quality and greater health risks. (airnow.gov)

What Are the AQI Categories?

The AQI is divided into six color-coded categories, each representing a different level of health concern:

1. Good (0 to 50): Air quality is satisfactory, and air pollution poses little or no risk. (airnow.gov)

2. Moderate (51 to 100): Air quality is acceptable; however, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. (airnow.gov)

3. Unhealthy for Sensitive Groups (101 to 150): Members of sensitive groups may experience health effects. The general public is less likely to be affected. (airnow.gov)

4. Unhealthy (151 to 200): Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. (airnow.gov)

5. Very Unhealthy (201 to 300): Health alert: The risk of health effects is increased for everyone. (airnow.gov)

6. Hazardous (301 and higher): Health warning of emergency conditions: everyone is more likely to be affected. (airnow.gov)

How Is the AQI Calculated?

The AQI is calculated based on measurements of key air pollutants, including:

• Ground-level ozone

• Particulate matter (PM₂.₅ and PM₁₀)

• Carbon monoxide

• Sulfur dioxide

• Nitrogen dioxide

Each pollutant has its own AQI value, and the highest value determines the overall AQI for that location. (airnow.gov)

Why Is the AQI Important?

Understanding the AQI helps individuals make informed decisions about outdoor activities, especially those sensitive to air pollution, such as children, the elderly, and individuals with respiratory or cardiovascular conditions. By monitoring AQI levels, you can take appropriate precautions to protect your health. (airnow.gov)

How Can Clime Help?

Clime offers real-time AQI data and forecasts, allowing you to stay informed about air quality in your area. With Clime, you can receive timely updates and health advisories, enabling you to plan your activities accordingly and minimize exposure to harmful air pollutants.

By understanding AQI categories and utilizing tools like Clime, you can take proactive steps to safeguard your health against the effects of air pollution.