US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDPart 611 — PRIMARY DRINKING WATER STANDARDSSubpart P611.68435 Ill. Adm. Code 611.684Averaging (Repealed)Last amended: 2004Year: 2026Length: 6 wordsOfficial source Section 611 Section 611.684 Averaging (Repealed)Previous35 Ill. Adm. Code 611.683Next35 Ill. Adm. Code 611.685