As part of the Town's NPDES Phase II permit, the Town must administer a program to identify and eliminate illicit discharges. Illicit discharges are pollutants dumped into streams or the stormwater system that are harmful to stream water quality or ecology. The Town's ordinance defines and prohibits illicit discharges to stormwater systems, and includes right of entry provisions, penalties, and due process procedures.
Pollutants may include, but are not limited to: paints, varnishes and solvents; gasoline and other petroleum fuels; oil and other automotive fluids; detergents; food waste, including cooking oil and grease; non-hazardous liquids and solid wastes and yard wastes; pool filter backwash; refuse, rubbish, garbage, litter, or other discarded or abandoned objects; floatables; insecticides, fungicides, herbicides, and other pesticides; fertilizers; soot, slag, and ash; hazardous substances and wastes; sewage, animal wastes, fecal coliform, Escheria coli, and pathogens; dissolved and particulate metals; hot water; wastes and residues that result from constructing a building or structure (including, but not limited to, sediments, slurries, and concrete rinsates); eroded soils, sediments, and particulate matter; and noxious or offensive matter of any kind.
For safe disposal, household hazardous wastes and some small-quantity business wastes may be taken to the Orange County Solid Waste HHW Collection Center at 1514 Eubanks Road, Chapel Hill. More information on HHW.
Allowable discharges that do not significantly impact water quality or cause or contribute to a violation of applicable water quality standards and are discharged in accordance with the best management practices (BMPs) in the Town’s Design Manual include:*
a. Water line flushing.
b. Landscape irrigation.
c. Diverted stream flows.
d. Rising groundwaters.
e. Uncontaminated groundwater infiltration.
f. Uncontaminated pumped groundwater.
g. Discharges from uncontaminated potable water sources.
h. Foundation or footing drains.
i. Air conditioning condensation (commercial/residential only)
j. Irrigation waters
l. Water from crawl space pumps.
m. Individual residential car washing.
n. Flows from riparian habitats and wetlands.
o. Discharge of street wash waters.
p. Firefighting activities.
q. Discharges from dechlorinated swimming pools. These discharges do not include pool filter backwash discharge or saltwater pool discharge, which are prohibited.
r. Discharges associated with emergency removal and treatment activities for hazardous materials if authorized by the federal, state or local government on-scene coordinator.
s. Maintenance activities of the stormwater drainage system requiring flushing or cleaning with potable water.
t. Illicit discharge permitted under an NPDES permit, waiver, or waste discharge order issued to the discharger and administered under the authority of the USEPA, or NCDWR, provided that the discharger is in full compliance with all requirements of the permit, waiver, or order and other applicable laws and regulations.
u. Discharges specified in writing by the Town Manager as being necessary to protect public health and safety or discharges that have been filtered through an approved pretreatment system that consistently demonstrate no discharge of pollutants.
*If any of the above-listed exceptions to the discharge prohibition are found to be polluted and may therefore negatively impact the quality of the waters of the State, the polluted illicit discharge exception shall be deemed unlawful and shall not be discharged into the stormwater drainage system. These conditions shall be determined by the Town Manager. These discharges, though listed as an exception above, shall be regulated as an illicit connection or discharge.