An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Office of Inspector General

Report: Differences in Processing Practices Could Decrease the Reliability of Ozone Data Used for Assessing Air Quality to Protect Public Health

Report #18-P-0105, February 28, 2018

What Was Found

There is a risk that the state, local and tribal agencies that monitor ambient air quality are not always implementing the EPA’s recommended QA practices for validating ozone data. This risk could reduce the quality of the data that the EPA uses to determine whether the air is healthy to breathe.

Report Materials

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Report at a Glance (PDF)(1 pg, 50 K)
Full Report (PDF)(41 pp, 636 K)

OIG Independence of EPA

The EPA's Office of Inspector General is a part of the EPA, although Congress provides our funding separate from the agency, to ensure our independence. We were created pursuant to the Inspector General Act of 1978, as amended Exit.

Environmental Protection Agency | Office of Inspector General
1200 Pennsylvania Avenue, N.W. (2410T) | Washington, DC 20460 | (202) 566-2391
OIG Hotline: 1-888-546-8740.