How was Philadelphias air quality in 2010?
In 2010, Philadelphia’s air quality was rated “good” on 227 days, “moderate” on 118 days, and “unhealthy” on 20 days. These ratings are based on the Air Quality Index (AQI), a system used by cities throughout the country to describe the quality of the air. Air Management Services (AMS) monitors the air quality and enforces the air pollution regulations in the city.
