200 South Hamilton
Gahanna, OH 43230
(614) 342-4100 Fax
Hours of Operation
8:00 AM - 5:00 PM M-F
Definition of Storm water
Storm water is the discharge of water due to runoff from precipitation. Storm water runoff occurs
when precipitation from rain or snowmelt flows over impervious surfaces. Impervious surfaces are areas that impede the infiltration of water into the soil. Concrete,
asphalt, rooftops and even severely compacted areas of soil are
Storm water can pick up debris, chemicals, dirt, and other pollutants. These substances are then carried into storm sewer systems or directly to a waterway. This discharge can destroy aquatic habitat, lessen aesthetic value, and threaten public
health with contaminated food, drinking water supplies, and recreational
waterways. For more information on preventing waterways pollution go to Project Clean Rivers.
Storm water Pollution
The following are guidelines for preventing storm water pollution:
- Compost or mulch yard waste. Don't leave it in the street or sweep into storm drains or streams.
- Use lawn care products (ie: fertilizer, herbicides, and pesticides) sparingly.
- Plant trees and vegetation. The root system stabilized the ground and thus slowing runoff and erosion.
- Properly dispose of
household hazardous waste (ie: engine oils, paints, pesticides, etc),
yard waste, pet waste, and kitchen grease.
- Never dump anything into storm drains and sewers (it is illegal).
- Keep drainage ditch and swales free of debris, litter, and obstructions.
- Wash cars at a commercial wash or over areas of gravel or grass.
- Sweep debris from sidewalks and driveways rather than washing debris away.
- Report hazardous spills, illegal dumping, blockages, and unusual odors.
Gahanna Woods Detention Basin
The Gahanna Woods Detention Basin is located off of Taylor Station Rd just south of Havens Corners Rd. The basin is part of the Gahanna Woods Park and is adjacent to the Gahanna Woods Nature Preserve. It was built in 2012 to detain peak storm water flows and improve water quality in the stream. Click here for more details.
Sycamore Run Stream Restoration
Residents along the lower reaches of the Sycamore Run Watershed have experienced high flows during storm events. This in turn has caused stream erosion. The area of the stream just south of the Hamilton Rd crossing has experienced severe erosion and floodplain degradation. The has secured a federal grant to fund a stream restoration project. The project consists of restoring over 1,000 feet of the Sycamore Run by stabilizing the stream channel, reconnecting the wooded floodplain and developing a stream habitat through native riparian plant species. The project will ultimately be accessible to the public and will include a trail and interpretive signs. Click here for more details.
A rain garden is an alternative way to alleviate storm water runoff. Native plants in a rain garden slow the flow of storm water from impervious surfaces. This allows the storm water to infiltrate the ground. This prevents erosion and pollution distribution into the stream and river beds. These gardens help eliminate pollutants, control erosion and prevent flooding. It does all of this while adding the beauty of plants and flowers to your landscape. You can place rain gardens near downspouts, driveways, sump pump outlets or in the path of storm water flow through your yard. The Rain Garden Initiative is a cost share program that will offer you up to $250 to install a rain garden on your property. This program is only available to six residents each year. Click here to learn more about the program or call Franklin Soil and Water Conservation District at 614-486-9613.
A rain barrel is a drum barrel that is used as a cistern to collect and store rainwater from your roof. This rainwater would otherwise be lost as runoff and flow into a storm drain. Rain barrels are placed under a gutter downspout. The water collected can then be used to water your lawn, water flowers, wash your car, top off a swimming pool, and other such activities. One advantage of rain barrels is that they save homeowners money while conserving water and protecting the environment. Gahanna was recently added to Franklin Soil and Water Conservation District’s GreenSpot Rain Barrel Program. Click here to learn more about the program and to download the registration form. If you need further information about the program you can call Franklin Soil and Water Conservation District at 614-486-9613.
NPDES Phase II Program
The U.S. Environmental Protection Agency and the Ohio Environmental Protection Agency enforce urban storm water regulations. These regulations are associated with a program known as the National Pollutant Discharge Elimination System (NPDES). This program requires local governments to develop plans to reduce storm water pollution in order to protect and improve waterways.
The program is comprised of six control measures that will reduce pollutant discharge. These include the following:
The City is required to submit a small municipal separate storm system (MS4) report every year to the Ohio EPA. Click here to review the annual NPDES report submitted to the Ohio EPA.
- Public Education and Outreach - newsletters, websites, and workshops relating storm water issues
- Public Participation and Involvement - programs and events that involve people in storm water management (ie: the rain garden initiative and stream cleanup days)
- Illicit Discharge Detection and Elimination - ensures that only rain goes down the drain
- Construction Site Runoff Control - review construction project's site plans to certify sediment, excessive runoff, and pollution will not enter streams or waterways
- Post-Construction Runoff Control - verify that runoff and pollution control structures are maintained
- Pollution Prevention and Good Housekeeping - measures taken by the City to protect waterways (ie: street sweeping and catch basin maintenance)
The City is required to submit a storm water management plan to the Ohio EPA during the first term of the permit cycle. The report outlines the City's compliance status with permit regulations, an evaluation of management procedures, and analysis of progress goals. The Storm Water Management Plan can be found by clicking here.
The City recently completed the Illicit Discharge Detection and Elimination (IDDE) Program and Plan. Click here to view the plan. The City welcomes public comments on the IDDE plan. If you are interested in submitting comments, click here.
Franklin Soil and Water Conservation District, FSWCD:
Ohio Department of Natural Resources, ODNR:
Ohio Environmental Protection Agency, OhioEPA: