US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER II: ENVIRONMENTAL PROTECTION AGENCYPart 691 — TESTING FEES FOR ANALYTICAL SERVICESSubpart A691.10435 Ill. Adm. Code 691.104Period of Program ParticipationLast amended: 2022Year: 2026Length: 23 wordsOfficial source Section 691 Section 691.104 Period of Program Participation Except as provided by Section 691.105(b), each community water supply shall participate in the Program.Previous35 Ill. Adm. Code 691.103Next35 Ill. Adm. Code 691.106