US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDPart 611 — PRIMARY DRINKING WATER STANDARDSSubpart T611.83135 Ill. Adm. Code 611.831Monthly Operating Report (Repealed)Last amended: 2019Year: 2026Length: 8 wordsOfficial source Section 611 Section 611.831 Monthly Operating Report (Repealed)Previous35 Ill. Adm. Code 611.830Next35 Ill. Adm. Code 611.832