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Direct discharges are pollutants that are discharged directly to a surface water body. [18]: 1–7 To legally discharge pollutants directly into a waterbody, a facility—municipal, industrial, commercial or government-owned—must obtain a National Pollution Discharge Elimination System (NPDES) permit from EPA or a state agency. [19]
Facilities that directly discharge to "waters of the United States" are required to obtain NPDES permits, and effluent guideline requirements are incorporated into these permits. Indirect dischargers (i.e. facilities discharging to POTWs) are subject to effluent guideline requirements called "Pretreatment Standards."
A Discharge Monitoring Report (DMR) is a United States regulatory term for a periodic water pollution report prepared by industries, municipalities and other facilities discharging to surface waters. [ 1 ] : 8–14 The facilities collect wastewater samples, conduct chemical and/or biological tests of the samples, and submit reports to a state ...
An effluent limitation is a United States Clean Water Act standard of performance reflecting a specified level of discharge reduction achievable by the best available technology or related standards for various sources of water pollution.
In the United States, the Clean Water Act requires all direct effluent discharges to surface waters to be regulated with permits under the National Pollutant Discharge Elimination System (NPDES). [15] [16] Indirect dischargers–facilities which send their wastewater to municipal sewage treatment plants–may be subject to pretreatment ...
The EPA regulations require each facility to apply for a specific permit for its wastewater discharges, and consequently require that each facility treat its wastewater. [101] In addition to effluent limitations , the permits include monitoring and reporting requirements, which are used by EPA and states to enforce the limitations. [ 17 ]
Nonpoint source (NPS) water pollution regulations are environmental regulations that restrict or limit water pollution from diffuse or nonpoint effluent sources such as polluted runoff from agricultural areas in a river catchments or wind-borne debris blowing out to sea. In the United States, governments have taken a number of legal and ...
Load allocation—determination of natural pollutant load, and load from human activities (i.e. diffuse nonpoint sources and point discharges). Set targets—establishment of water quality targets intended to restore or maintain beneficial uses. TMDL implementation plan—a watershed management strategy to attain established targets. [7]