About AirQuality.directory

Your trusted source for real-time air quality information

Our Mission

AirQuality.directory makes air quality data accessible, understandable, and actionable for everyone. We believe that everyone deserves to know what they're breathing and how to protect their health.

By providing instant air quality information for any US address or ZIP code, we empower people to make informed decisions about outdoor activities, travel, and daily routines based on real-time environmental conditions.

How It Works

1. Enter Your Location

Type any US address, city, or ZIP code. Our system instantly finds your exact coordinates.

2. We Find the Best Station

We analyze nearby monitoring stations and select the one with the most comprehensive, recent data.

3. Get Clear Results

See your AQI, pollutant breakdown, health recommendations, and learn about each pollutant detected.

Our Data Sources

OpenAQ

We use the OpenAQ platform, which aggregates real-time air quality data from thousands of government monitoring stations worldwide, including the EPA's Air Quality System (AQS).

EPA Standards

All AQI calculations follow the EPA's official Air Quality Index methodology, ensuring accurate and consistent air quality assessments.

Update Frequency

Most monitoring stations update hourly. We cache results for 1 hour to ensure fast response times while maintaining data freshness.

Understanding the Air Quality Index

The Air Quality Index (AQI) is a standardized indicator developed by the EPA to communicate how polluted the air currently is or how polluted it is forecast to become. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air.

0-50: Good - Air quality is satisfactory

51-100: Moderate - Acceptable for most people

101-150: Unhealthy for Sensitive Groups - Sensitive individuals may experience effects

151-200: Unhealthy - Everyone may begin to experience effects

201-300: Very Unhealthy - Health alert: everyone may experience serious effects

301-500: Hazardous - Health warnings of emergency conditions

Privacy First

We don't track your location or store your search history. All lookups are anonymous and processed in real-time. See our Privacy Policy for details.

Accuracy & Limitations

Air quality can vary significantly over short distances. Our data represents conditions at the nearest monitoring station, which may be several miles away. For the most accurate assessment, we recommend checking multiple nearby locations.

Have Questions or Feedback?

We're constantly improving AirQuality.directory based on user feedback.