Public Data

This map shows the locations of regulated PM2.5 stations and all public Specks. Enter an address or location to find the nearest regulated station and see the current and historical air quality. Or, select a marker on the map to see a plot of the air quality at that location. The regulated station markers are colored according to their most recent value using the US EPA PM2.5 scale shown below.

US EPA PM2.5 Scale (μg/m3)
Good 0.0 - 12.0
Moderate 12.1 - 35.4
Unhealthy for Sensitive Groups 35.5 - 55.4
Unhealthy 55.5 - 150.4
Very Unhealthy 150.5 - 250.4
Hazardous 250.5 - 500