Section 309.142  Water Quality Standards and Waste Load Allocation

If an NPDES Permit includes as conditions the effluent standards and limitations described in Sections 309.141, 309.142, and 309.143, the Agency must determine and verify that the discharge authorized by the permit will not violate applicable water quality standards or a schedule of compliance to achieve applicable water quality standards contained in the NPDES Permit.  If an NPDES Permit applies any more stringent effluent limitation based on applicable water quality standards, a waste load allocation must be prepared to ensure that the discharge authorized by the permit is consistent with applicable water quality standards.

(Source:  Amended at 47 Ill. Reg. 5017, effective March 23, 2023)