The RAPCA air monitoring program is required by the Clean Air Act and U.S EPA to determine compliance with the National Ambient Air Quality Standards (NAAQS). The network provides real time air quality data to the public on a daily basis. Quality-assured data is also uploaded each month to U.S. EPA’s Air Quality System (AQS) Data Mart. Please visit U.S. EPA’s Air Data website to access data collected by our agency. Should you have any questions or need help finding a particular data set, please contact us.

Real time data can also be accessed on AirNow.

The RAPCA area is currently designated by U.S. EPA in attainment for all NAAQS. If you are interested in learning more, visit Ohio EPA’s Attainment Designation page.

Hourly Concentration Data Tables

NOTE: Ozone data at our NCORE site is collected year-round. The other ozone sites only operate during the official ozone season, which runs from March 1 - October 31.

RAPCA no longer collects daily pollen and mold counts. Historical counts are maintained on this website and can be requested. We recommend anyone interested in pollen and mold readings visit the American Academy of Allergy Asthma & Immunology and the National Allergy Bureau for certified accurate data, Pollen.com or visit their preferred weather app.

Pollen Data