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1. What is stormwater?

Stormwater is water from rain. In urban and suburban environments, stormwater often refers to the water that flows from the rooftops and paved surfaces, otherwise known as runoff.

2. What is an impervious surface?

Impervious surfaces are solid surfaces that cover the ground and prevent stormwater from infiltrating into the soil. Examples of impervious surfaces include: driveways, sidewalks, buildings, and parking lots.

3. How does the stormwater drainage system work?

The stormwater drainage system receives rainwater when runoff flows into drainage structures. Gravity moves the water through the pipes until it reaches a waterway. Stormwater systems can be very short, with only one drain and one pipe, or they can be a complex series of drains and pipes that lead to a waterway.

4. What is nonpoint source pollution?

NonPoint Source Pollution (NPS) is pollution that comes from diffuse sources, i.e. sources that are spread out and widely scattered. This means that the pollutant is coming from many locations, in small amounts. NPS is usually associated with stormwater because the runoff generated during rain events can carry pollutants from the ground to the stream.

5. How is the stormwater system managed in Lilburn?

The City of Lilburn has entered into an agreement with Gwinnett County for services to the stormwater system. Some of the tasks that Gwinnett County Department of Water Resources performs are: inspection of the drainage system, repairs to the system, and educating the public about the system.

6. Why shouldn’t I pour cooking grease down the drain?

Fats, oils, and grease create clogs that can cause a backup in your home’s plumbing or in the public sewer system, which can lead to a sewage overflow into the environment.” Check out the Gwinnett County website for more information.