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.

Learn the Lingo

Do environmental terms sometimes sound like a foreign language to you? If so, you’re not alone. Many businesses and communities have difficulty keeping up with the latest environmental lingo. This feature will cover some common environmental terms you may encounter.

Publicly-Owned Treatment Works (POTW) — A centralized collection and treatment system that handles wastewater from homes and businesses, and is owned by a public entity such as a city, village, county or sewer district. Sanitary sewers collect and transport wastewater to a treatment plant, where it is treated and then discharged, usually to a stream, river or lake.

Residential Treatment System — A privately-owned system designed to treat wastewater generated from a one-family, two-family or three-family dwelling. These systems, typically septic tanks with leachfields or aeration systems with a specific discharge point, are commonly found serving homes where sanitary sewers are not available.

Watershed — A watershed is an area of land from which surface water drains, via one or more watercourses, into a common outlet, such as a river, lake or wetland. Depending on its size and location, a watershed can contain one or many of the following features: streams, ditches, ponds, lakes or wetlands. Watersheds are sometimes called drainage basins or hydrologic units.