Indirect discharge

Indirect discharge

1. Sewage from a non-domestic source of pollutants into amunicipal (often state-owned) wastewater treatment system. Indirect discharges can be of commercial or industrial facilities, which must pre-treat their wastes before discharge into the municipal sewers. Indirect discharges also may apply leachates, etc., from, for example, the waste deposal sites that contaminate underground waters.