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Illicit Discharge Hot Line: 803-909-7250
What is an Illicit Discharge and Illegal Connection?
An illicit discharge is any discharge to the storm sewer system that is not composed entirely of rain water or groundwater. Examples include, dumping of motor vehicle fluids, household hazardous wastes, grass clippings, leaf litter, industrial waste, restaurant wastes, or any other non-stormwater waste into a storm sewer system.
An illicit connection is the discharge of pollutants or non-stormwater material into a storm sewer system via a pipe or other direct connection that is non-permitted. Some sources of illicit connections include illegal sewer taps or straig pipes, wash water pipes from homes, and shop floor drains into the storm sewer system.

Why are finding, fixing, and preventing illicit discharges & illegal connections important?
Illicit discharges enter our streams, creek, rivers and Lake Wylie contributing to high levels of pollutants (e.g., heavy metals, toxins, solvents, nutrients, and bacteria) that have been shown to significantly degrade water quality and threaten aquatic wildlife and human health.
How do I spot an Illicit Discharge or Illegal Connection?
- Look for makeshift pipes or hoses that lead to a storm drain or body of water.
- Watch for stains, unusual odors and colors, structural damage to streets or gutters, and abnormal vegetative growth in nearby lakes and streams.
- During dry weather, stormwater flows should be non-present or minimal. Look for suspicious liquids flowing from pipe outfalls during these times. With the exception of irrigation water, it’s often an illicit discharge coming from an illegal connection.
- Keeps an eye out for anyone dumping anything into the storm sewer system or drainage ditches. Even yard waste is a pollutant.
What is allowed in York County?
Lawn irrigation discharges
Agricultural irrigation
Air conditioning condensation
NPDES permitted discharges
Water line flushing by Government/Fire Fighting
Building cosmetic cleaning (no hazardous chemicals)
Car washings
(Do not dump wash water into the storm drainage system)
What Is Not Allowed in York County (Illicit Discharges)?
Dumping of all automotive liquids
All substances associated with paint
Industrial discharges with no NPDES permit
Washing machine discharges
Sewage discharges
Floor drain discharges
Chlorinated backwash from pools

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