As a precautionary response to COVID-19, Ohio EPA is currently operating with most staff working remotely. If you are working with our staff on a current project and you know the name of the employee you are working with, email them at or call them directly. The Agency website has contact information for every district, division, and office. In order to reach us, please contact Ohio EPA’s main phone line at (614) 644-3020 or the main line for the division or office you are trying to reach.

After March 23, our district offices and Central Office will be temporarily closed and will have increasingly limited ability to receive deliveries, plans, etc. All entities are encouraged to submit plans, permit applications, etc., electronically where there are existing avenues to do so, such as the eBusiness Center (eBiz). Please refer to the list of available services on the main eBiz webpage. We encourage you to make use of all that apply, even if you have not used eBiz in the past. Plans under 25 MB can be emailed. For large plans over 25 MB, entities should work with the reviewer/division to upload via LiquidFiles. Directions for submitting docs via LiquidFiles is available on YouTube. We apologize for the inconvenience and thank you in advance for your understanding.

To report a spill or environmental emergency, contact the spill hotline (800) 282-9378 or (614) 224-0946

The Resource rss

Helping communities and businesses access compliance, technical and financial assistance for their environmental needs.

On Jan. 25, 2018, U.S. EPA issued a guidance memo regarding the applicability of U.S. EPA’s maximum achievable control technology (MACT) standards. This guidance supersedes the May 1995 Seitz Memorandum, and pursuant to the Federal Register notice, became effective on Feb. 8, 2018.

Under the new guidance, if you historically reduced your emissions to below the major source MACT standard’s applicability thresholds, you are no longer required to comply with the major source MACT standard. Depending on your reduced emission levels, this means you can now comply with the less stringent area source MACT standard; or, in some cases, no MACT standard would apply.

The new guidance also means that facilities/sources that accepted operational restrictions to avoid being subject to a major source MACT standard may no longer be subject to Title V permitting or may be able to discontinue using MACT-required HAP controls.

More information about the withdraw of the Once in Always In policy, along with guidance on how to take advantage of the change, can be found at:

This fact sheet explains the new guidance and will help you determine if it applies to your operations. It also outlines the next steps and other considerations for you to determine if your Title V permit requirements can be reduced under the new guidance.

For more information, please contact Briana Mastriana, Division of Air Pollution Control, MACT Coordinator, at or (614) 644-3698.