Storm Water Program

Storm water discharges are generated by runoff from land and impervious areas such as paved streets, parking lots, and building rooftops during rainfall and snow events. Storm water often contains pollutants in quantities that could adversely affect water quality. Most storm water discharges are considered point sources and require coverage by a National Pollutant Discharge Elimination System (NPDES) permit. The primary method to control storm water discharges is through the use of best management practices (BMPs).

For information about storm water management at home, visit the Public Interest Center's website.

Ohio EPA’s draft Industrial Storm Water General Permit (OHR000006) has been public noticed for comment, please go here for more information. If your company is a permittee of the current NPDES industrial storm water general permit (OHR000005), this coverage will continue until your company receives a renewal notice from Ohio EPA stating that the general permit renewal (OHR000006) is now available. Permittees of OHR000005 will have up to 90 days from the receipt of that renewal notice to apply for coverage under OHR000006. Since Ohio EPA cannot grant coverage under a NPDES general permit that has yet to be issued, permittees of OHR000005 should not try to renew their permit coverage until OHR000006 is issued final.

STREAMS application system is now available!

Access electronic versions of the below hard copy forms through your Ohio EPA eBusiness Center account and submit electronically!  Benefits include a much easier form and streamlined experience with prepopulated form information, field validation to ensure a complete application, one-click submission w/nothing to mail, both check and ePAY options, and fast & efficient Agency review/issuance (from 21+ days to 72 hrs when submitting via STREAMS vs. the below hard copy method).  Visit DSW's Electronic Business Services website for more information, guidance, and reporting questions.

Notice of Intent Applications

For use for coverage under Ohio EPA's storm water general permits, except for industrial storm water. The instructions describe the portions of the application that you should complete, depending on the general permit coverage you want. Any NOI application for construction activity must include a vicinity map.

NOI Form - Latitude and Longitude must be provided. Please see NOI application instructions.

Construction Storm Water Co-Permittee Notice of Intent (NOI) application. This application form is used by construction site operators, as defined in Part VII.O of the NPDES Construction Storm Water General Permit (CGP), to become co-permittees with the initial permittee of a construction site. Part II.A of the CGP requires all operators at a construction site to become co-permittees.

Construction Storm Water Individual Lot Notice of Intent (NOI) application and instructions. For use when a portion of a construction site is bought and sediment and erosion control responsibility is transferred to the owner of the individual lot.

Industrial Storm Water Notice of Intent (NOI) application for coverage under Ohio EPA's industrial storm water general permit

Small MS4 Co-Permittee Notice of Intent (NOI) application form

    Application Form

Notice of Termination Applications

Application to terminate NPDES general permit coverage.

    NOT application form
    NOT application instructions

Construction Storm Water Individual Lot Notice of Termination (NOT) application and instructions. This application may be used by the original permittee (e.g., a residential developer) of a site or by an individual lot operator (e.g., a homebuilder) to terminate NPDES construction storm water general permit coverage for a lot where final stabilization was achieved.

    Individual Lot NOT application form
    Individual Lot NOT application instructions

NPDES permit transfer application

For use when an entire facility or site is bought or operational responsibility is transferred to a new entity.

Small MS4 Annual Report Form

Required for use by Small MS4 operators to submit annual reports. Small MS4s may request approval to use their own reporting format, which will be reviewed on a case-by-case basis. Small MS4 annual reports are due on April 1.

Industrial No Exposure Certification

If you qualify for no exposure certification, you are exempt from permit requirements until your facility no longer qualifies for no exposure certification. If your facility changes and can no longer claim no exposure to storm water, you must submit the appropriate permit application for storm water discharge. The No Exposure Certification form must be submitted to Ohio EPA at least once every five years.

For additional background information, see the following U.S. EPA documents:

Storm Water General Permits


picture of construction site

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. 

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.

How do I get a permit?

Most sites may get permit coverage under the general permit for discharge of storm water associated with construction activity. To get permit coverage, follow these steps, in order:

picture of construction site

  • Develop a Storm Water Pollution Prevention Plan (SWP3) for the construction site;
  • Submit a Notice of Intent (NOI) requesting coverage for your discharges under the general permit;
  • Wait until you receive the Ohio EPA approval letter stating that you are covered under the general permit;
  • Ensure that contractors, subcontractors and staff understand their roles in carrying out the SWP3;
  • Implement the SWP3;
  • Proceed with construction, including regular maintenance and inspection of sediment and erosion controls and storm water management facilities.

Potential Waivers for 1- to 5-Acre Site Disturbances

Information and Permit Compliance Materials

Construction General Permits

Activities that take place at industrial facilities, such as material handling and storage, are often exposed to storm water. The runoff from these activities discharges industrial pollutants into nearby storm sewer systems and water bodies.This may adversely impact water quality.

Eleven Categories of Storm Water Discharges Associated With Industrial Activity (U.S. EPA website)

Potential Waiver for Facilities with "No Exposure"

If you qualify for no exposure certification, you are exempt from permit requirements until your facility no longer qualifies for no exposure certification. If your facility changes and can no longer claim no exposure to storm water, you must submit the appropriate permit application for storm water discharge. The No Exposure Certification form must be submitted to Ohio EPA at least once every five years.

For additional background information, see the following U.S. EPA documents:

Industrial General Permits

OHR000005  Industrial Storm Water

OHRM00002 Marina Storm Water


What is a Municipal Separate Storm Sewer System (MS4)?

A conveyance or system of conveyances (including roads, catch basins, curbs, gutters, ditches, man-made channels, or storm drains):

  • Owned or operated by a public bodypicture of a waterpipe
  • Designed and used for collecting storm water
  • Is not a combined sewer
  • Is not part of a Publicly Owned Treatment Works (POTW)

The U.S. EPA's storm water program addressed storm water runoff in two phases. Phase I addressed storm water runoff from large and medium MS4s. Large municipalities with a separate storm sewer system serving a population greater than 250,000 and medium municipalities with a service population between 100,000 and 250,000 had to obtain NPDES permits. Initial application deadlines for large and medium municipalities were November 16, 1992 and May 17, 1993, respectively. As part of their individual NPDES permit applications, the large and medium MS4s had to develop a storm water management program (SWMP).

Individual MS4 permits for discharge of storm water

The Phase II regulations address storm water runoff of MS4s serving populations less than 100,000, called small MS4s. More particularly, small MS4s located partially or fully within urbanized areas (UAs), as determined by the U.S. Bureau of the Census, and also on a case-by-case basis for those small MS4s located outside of UAs that Ohio EPA designates into the program. Automatically designated Small MS4s, those in UAs, were required to apply for permit coverage and develop and submit a SWMP by March 10, 2003.

Urbanized Areas

U.S. EPA developed a Fact Sheet [PDF 239K] explaining how urbanized areas affect water quality through increased runoff and pollutant loads and what homeowners can do to prevent storm water pollution.

Ohio EPA developed two general permits that were issued to Phase II Small MS4 communities under the first generation permitting in 2003. The Baseline General Permit allowed a full 5 years for SWMP development/implementation; whereas, the Alternative General Permit for MS4s Located within Rapidly Developing Watersheds required development/implementation of the Construction and Post-Construction minimum control measures within 3 years. The alternative general permit was issued to a select group of MS4s that Ohio EPA considered being located within rapidly developing watersheds. All MS4s will now be covered under the general permit renewal that was issued on January 31, 2009

USEPA developed a set of digitized maps which display detailed urbanized area maps. See the following link:image of a map

USEPA Urbanized Area Maps

Ohio EPA developed a set of digitized maps which display detailed area maps for watersheds that Ohio EPA has identified as being rapidly developing. See the following link:

Rapidly Developing Watersheds

Regulated Small MS4s

Small MS4 Informational Materials

Permit Compliance Materials

Potential Funding Sources

Any questions about the storm water program should be directed to the Central Office Storm Water Section or to the appropriate district office.

Central Office Storm Water Permitting Staff

Joseph, Michael


(614) 752-0782

Robinson, Anthony


(614) 728-3392

Fyffe, Jason


(614) 728-1793

Kallipolitis, Harry

Section Manager

(614) 644-2146



District Office Storm Water Staff


Central District Office


Bogoevski, Dan

Northeast District Office

(330) 963-1145

Hablitzel, Lynette

Northwest District Office

(419) 373-3009

Link to SEDO County Contacts

Southeast District Office

(740) 385-8501

Flanagan, Michelle

Southwest District Office                 

(937) 285-6440



Central Office Storm Water Technical Assistance Staff

Mathews, John


(614) 265-6685

Dorsey, Jay

Water Resources Engineer

(614) 265-6647



Transportation Related Projects