NPDES Storm Water General Permit List

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. Under each currently effective storm water general permit, dropdown menu options provide the following information:

• (1) a list of entities having coverage under the general permit
• (2) information & guidance pertaining to the general permit
• (3) the general permit

Construction Storm Water General Permits (OHC000002 & OHC000003)

Big Darby Creek Watershed Construction Storm Water General Permit (OHCD00001)

Industrial Storm Water General Permit (OHR000004)

Marina Storm Water General Permit (OHRM00001)

Small MS4 General Permit - Baseline (OHQ000001)

Small MS4 General Permit - Rapidly Developing Watershed (OHQ100000)

Coal Surface Mining Activities (OHM000001)

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
• R or G - industrial storm water
• Q or Q1 - municipal separate storm sewer systems (MS4s)
• M - coal surface mines

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.

If you have any questions regarding the storm water general permits, please see the Storm Water Program Contacts page.

Back to Storm Water Program page.
Back to General Permits page.