California Code, Water Code - WAT § 13263.6

(a) A publicly owned treatment works (POTW) may require pollution prevention plans as described in Section 13263.3 as part of the pretreatment requirements applicable to significant industrial users.

(b) The state board or a regional board shall prescribe effluent limitations as part of the waste discharge requirements of a POTW for all substances that the most recent toxic chemical release data reported to the state emergency response commission pursuant to Section 313 of the Emergency Planning and Community Right to Know Act of 1986 (42 U.S.C. Sec. 11023) indicate are discharged into the POTW and that the state board or a regional board has determined has the reasonable potential to impair water quality.