For the purposes of this subchapter, the following definitions apply:

(1) "Board" means the Montana board of environmental review established by 2-15-3502 , MCA.

(2) "Department" means the Montana department of environmental quality established by 2-15-3501 , MCA.

(3) "EPA" means the United States environmental protection agency.

(4) "Federal Clean Water Act" means the federal legislation at 33 USC 1251, et seq.

(5) "MPDES" means the Montana pollutant discharge elimination system developed by the board of environmental review and the department of environmental quality for issuing permits for the discharge of pollutants from point sources into state waters.