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 monitoring sites are
listed by Map ID, county and AIRS site ID for each state
and can be viewed by clicking on the List. Monitor can be mapped by clicking on SITE ID.
Map.
Each site is indicated by a black dot and a Map ID (capital
letters starting with A). The monitoring sites are
listed by Map ID, county and AIRS site ID for each state
and can be viewed by clicking on the 
List. Monitor can be mapped by clicking on SITE ID.
