(415 ILCS 5/3.175) (was 415 ILCS 5/3.80)
    Sec. 3.175. Criterion. "Criterion" means the numerical concentration of one or more toxic substances calculated by the Agency as a basis for establishing a permit limitation or violation of a water quality standard pursuant to standards and procedures provided for in board regulations.
(Source: P.A. 92-574, eff. 6-26-02.)