The Agency maintains a monitoring network that uses state-of-the-art instruments dedicated to collecting high-quality air quality data. This data determines the compliance status of Southwest Ohio with the National Ambient Air Quality Standards (NAAQS) established by the U.S. EPA. Southwest Ohio is currently in compliance with three of the six of the NAAQS.
Current Local Air Quality Map
To determine the air quality in Southwest Ohio, the Agency maintains monitors in four counties—Butler, Clermont, Hamilton and Warren. There are two types of monitors:
Continuous monitors: operate constantly and measure ozone, sulfur dioxide, carbon monoxide, oxides of nitrogen and inhalable particulates. Fifteen continuous monitors are located in Southwest Ohio.
Intermittent monitors: collect airborne particles at 24-hour intervals from twelve locations in the area. Toxic monitoring data is also collected from intermittent monitors at four locations.
Click on the map above to view a larger pdf version of the map. In the chart below, click on the location name link for more detailed monitoring data and click on the element name link in the header row for graphs of air quality trends.