California Code of Regulations
Title 23 - Waters
Division 3 - State Water Resources Control Board and Regional Water Quality Control Boards
Chapter 26 - Wastewater Treatment Plant Classification, Operator Certification, and Contract Operator Registration
Article 1 - General Provisions
Section 3670.1 - Certification Requirements for Operating Wastewater Treatment Plants

(a) Except as provided in subdivision (b), no person shall operate a wastewater treatment plant without a valid, unexpired, State Water Board-issued operator, provisional operator, or operator-in-training certificate at a grade level appropriate for the class of wastewater treatment plant being operated as set forth in sections 3680, 3680.1, and 3680.2.

(b) A person certified by the California Department of Public Health as a water treatment plant operator may operate a water recycling treatment plant at a grade level appropriate for the class of wastewater treatment plant being operated as set forth in sections 3680 and 3680.1.

(c) Any person who operates a wastewater treatment plant without a valid, unexpired certificate as required by subdivisions (a) and (b) is subject to administrative civil liability as set forth in section 3709 and disciplinary action pursuant to sections 3710 and 3719.12.

(d) Any person who owns or operates a wastewater treatment plant that employs, or allows the employment of, any person performing the duties of an operator who does not hold a valid, unexpired certificate as required by subdivisions (a) and (b) is subject to administrative civil liability as set forth in section 3709(b)(2) and disciplinary action pursuant to sections 3710 and 3719.12.