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 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 firstname.lastname@epa.ohio.gov 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. If you wish to send hard copies of documents to any of Ohio EPA’s district offices, the best method to ensure we receive these documents is to send them via U.S. Mail. Since all offices are closed, deliveries outside of U.S. Mail (FedEx, UPS) will likely be returned because the offices are closed and deliveries cannot be made.

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

Dischargers Covered Under Storm Water Discharge General Permits

This page contains lists of entities having National Pollutant Discharge Elimination System (NPDES) Storm Water General Permit Coverage authorization to discharge to surface waters of Ohio.


Construction Storm Water General Permits (Statewide, Big Darby Creek Watershed and Olentangy River Watershed)


Industrial Storm Water General Permit (OHR000006)


No Exposure Certifications


Marina Storm Water General Permit (OHRM00002)


Small MS4 General Permit (OHQ000003)


The Ohio EPA facility permit number identifies which of our five districts the facility is located within and which general permit coverage has been granted. The first character, 0 - 4, represents which district:

  • 0 - Southeast District Office (SEDO) 
  • 1 - Southwest District Office (SWDO) 
  • 2 - Northwest District Office (NWDO) 
  • 3 - Northeast District Office (NEDO) 
  • 4 - Central District Office (CDO)

The second character, "G" indicates the number is a facility covered by a general permit.

The third character, a letter, indicates which general permit:

  • C - construction storm water 
  • CD - big darby creek watershed construction storm water
  • CO - olentangy river watershed construction storm water
  • R - industrial storm water 
  • Q or Q1 - municipal separate storm sewer systems (MS4s) 

The remaining numbers are specific to each site and the suffix indicates whether it is the site’s initial (*AG) or renewal (*BG, etc.) coverage.