Illicit Discharge - Any liquid, not composed entirely of stormwater, that is introduced into a stormwater system. Examples include solvents, vehicle fluids, fuels, paints, household products or chlorinated swimming pool water.
Illicit Dumping - Unloading or disposal of solid, semi-solid or liquid substances near or into a stormwater system. Examples include motors, containers, grass clippings and leaves.
Illicit Spills - Any intentional or accidental spill of solid, semi-solid or liquid substances into or adjacent to a stormwater system. Examples include fluids from vehicles, chemicals from drums or storage tanks, used oil, paint containers or fertilizer.
Illicit Connections - Any man-made conveyance which connects non-stormwater discharges directly to a stormwater system. These illicit conveyances are located either above or below the ground and may include drains, pipes or ditches.