What is stormwater runoff?

Stormwater runoff is rainwater that reaches the ground and falls on hard, non-porous (impervious) surfaces like rooftops, buildings, sidewalks and roads. Instead of soaking in, the water then “runs off,” collecting pollutants from lawns, streets and gutters. This runoff then drains directly into rivers, streams, ponds and lakes.

The debris, chemicals, dirt and other contaminants that are picked up in stormwater runoff flow into a storm water system or even directly into streams, lakes and rivers. Anything entering the system is untreated and goes right into water used for fishing and recreation; this water is ultimately treated to be used as drinking water. Additionally, as development adds more impervious surface, its runoff must be managed as well.

What is stormwater management?

Through proper management, we can help reduce or even prevent flooding and erosion of streams. We can also protect and improve the quality of our water and keep contaminants out of the drainage system. In fact, state & federal regulatory agencies require local stormwater programs to control pollution through an unfunded mandate.

City of Kennesaw’s Stormwater Program

The City of Kennesaw’s stormwater system is extensive and aging. Over half of the collection system is outdated, dirty, or nearing the end of its lifespan.

View the Stormwater Management Plan (SWMP).

Drainage System Statistics:

– Over 123,000 feet of pipe – that’s about 23 miles!
– Over 4,900 structures, including catch basins, outlets and junction boxes
– Over 4,000 feet of roadside ditches
– 250 stormwater detention ponds

The city’s Public Works Department will address the system’s deficiencies through a multi-pronged approach including inspections, regular maintenance, replacement of broken and ineffective elements of the system, and compliance with government regulations.

ILLICIT DISCHARGE

What is an Illicit Discharge?

Illicit discharge means any direct or indirect non-stormwater discharge to the municipal separate storm sewer system (MS4). As the saying goes, “Only Rain Down the Storm Drain”. Illicit discharges include things like wastewater from a sanitary sewer leak, soapy water from washing a car, gas spilled or poured down a storm drain, and more. If you see something, say something!

Report an Illicit Discharge or other Stormwater Issue to Kennesaw 311

What Homeowners Can Do

The public has an important role to play as well.  The program’s success depends on the support and involvement of citizens. Become an informed participant in voluntary conservation and preservation initiatives and learn how you can help.

We all have a stake in protecting our valuable resources. Here are ways to help us reduce pollution at the source:

  • First, learn how to identify a storm drain. The next time you are walking around your neighborhood look for catch basins and other storm structures. You may have a storm drain right in front of your house. Be sure that these are kept clean and clear of debris. If you notice an issue, report it to the City using the “Report a Concern” page on the City’s website.
  • Dispose of grass clippings and other yard debris by placing it curbside on the designated days; better yet, start a compost. DO NOT blow leaves, cut grass, or other yard debris out into the street where it will wash into the nearest storm drain.
  • Use pesticides and fertilizers sparingly and only in the recommended amounts.
  • Properly dispose of household hazardous wastes, oils, and chemicals. This includes paint, cleaning fluids, motor oil, gasolines, and antifreeze. DO NOT dump them down the storm drain. Look for community disposal and recycling events. Cobb County has more information about household hazardous waste on their website: https://www.cobbcounty.org/keep-cobb-beautiful/recycling
  • Wash your car at a commercial car wash that treats and recycles its wastewater. If washing your car at home, do so over a pervious surface such as grass or gravel. Try to minimize use of soaps and detergents.
  • When walking your pet, remember to pick up pet waste and dispose of it properly so harmful bacteria don’t wash into storm drains.
  • Reduce runoff by landscaping instead of paving.