Note: EPA no longer updates this information, but it may be useful for historical purposes.
The
locations of all ozone monitoring sites in each state can be viewed
by clicking on the
Map. Each site is indicated by a black dot and a Map ID
(capital letters starting with A). The ozone air quality
data by Map ID, county and monitoring site location for each state
and can be viewed by clicking on the List.
Map. Each site is indicated by a black dot and a Map ID
(capital letters starting with A). The ozone air quality
data by Map ID, county and monitoring site location for each state
and can be viewed by clicking on the 
List.
