NPDES

Storm Water Discharges from Small and Large Construction Activities
Construction sites impact Ohio's waters by:
  • adding pollutants, especially sediment, to rainwater running off of construction sites during construction; and
  • making long-term land use changes that alter the hydrology and pollutant loading of local streams.
To limit the negative impacts of construction projects on Ohio's waters, Ohio EPA administers a permitting program designed to document construction activity in the state and require practices that keep pollutants out of the streams. The permitting program is mandated in the Clean Water Act and is part of the NPDES (National Pollutant Discharge Elimination
System) program.

The City of Canal Winchester operates as a MS4 (Municipal Separate Storm System) under the OEPA General Permit, hence construction projects within the City shall comply with OEPA regulations regarding Construction Site Storm Water.

Additional information can be found at the OEPA Division of Surface Water website.

Who needs a permit?
As of March 10, 2003, if your project disturbs 1 or more acres of ground, you must get a permit to discharge storm water from your site. If your project disturbs less than 1 acre but is part of a larger plan of development or sale, you also need a permit to discharge storm water from the site.

General Permit Authorization
Construction activities covered: except for storm water discharges identified under Part I.B.2, this permit may cover all new and existing discharges composed entirely of storm water associated with construction activity that enter surface waters of the state or a storm drain leading to surface waters of the state.