US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDPart 611 — PRIMARY DRINKING WATER STANDARDSSubpart O611.65735 Ill. Adm. Code 611.657Analytical Methods for 36 Contaminants (Repealed)Last amended: 1992Year: 2026Length: 10 wordsOfficial source Section 611 Section 611.657 Analytical Methods for 36 Contaminants (Repealed)Previous35 Ill. Adm. Code 611.650Next35 Ill. Adm. Code 611.658