Stormwater Regulations


For construction activities disturbing one or more acres of total land, or will disturb less than one acre of land but are part of a larger common plan of development or sale that will ultimately disturb one or more acres, a Storm Water Pollution Prevention Plan (SWPPP) will need to be developed.

 Greene County Stormwater Regulations

The NPDES Phase II rule requires construction sites disturbing equal to or greater than one acre and less than five acres to control pollutants in stormwater runoff. Construction activity disturbing less than one acre requires a permit if it is part of a larger common plan of development or sale disturbing a total of one acre or greater, or is individually designated for permit coverage by the NPDES permitting authority.

Ohio Environmental Protection Agency General Stormwater Permit

NPDES EPA Stormwater General Permit OHC000005Effective Date April 23, 2018; Expiration Date April 22, 2023 

Related Documents and Forms

Post-Construction Stormwater

 All residential, commercial, industrial, and other sites developed in unincorporated areas which increase impervious surface must detain the increase storm water runoff.