Any unauthorized, unknown, unpermitted or illegal drainage connection through which non-storm discharges could drain to a storm water conveyance.
an illegal connection of a sanitary sewer into a storm sewer that allows human waste to go directly into streams and rivers. Illegal connections also include illegal storm water connections to sanitary systems, such as sump pumps that homeowners have connected into the sanitary sewer system instead of discharging into their yard or storm sewer.
any connection to a storm drain system for which there is no permit or is used for an illegal discharge.
Illicit connections are defined as illegal and/or improper connections to storm drainage systems and receiving waters.
Any connection to the storm drain system that is not permitted: or any legitimate connection that is used for illegal discharge.
Any discharge to a municipal separate storm sewer that is not composed entirely of stormwater and is not authorized by an NPDES permit, with some exceptions (e.g., discharges due to fire-fighting activities)
a discharge to a storm sewer that is not composed entirely of storm water and is not authorized by a permit. Often caused by the unintentional discharge of domestic (human, household) wastewater via damaged wastewater collection systems, but also from intentional discharges of other wastes.
