U.S. Counties Health Map & Air Pollution Monitors
Good
Moderate
Unhealthy if Sensitive
Unhealthy
Very Unhealthy
Hazardous
0-50 
51-100 
101-150 
151-200 
201-300 
301-500 
Fine Particulate Matter PM2.5*
Is an air pollutant that is a concern for people's health when levels are high. PM2.5 are tiny particles in the air which reduce visibility and cause the air to appear hazy when levels are elevated.
Learn more about air pollution and your healthNearby Pollution Monitors
ID
Location
Time
Type
Level (µg/m3)
