California Code of Regulations
Title 22 - Social Security
Division 4 - Environmental Health
Chapter 15 - Domestic Water Quality and Monitoring Regulations
Article 3 - Primary Standards-Bacteriological Quality
Section 64421 - General Requirements

Universal Citation: 22 CA Code of Regs 64421

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

(a) The requirements of this Article apply to public water systems.

(b) In addition to the bacteriological monitoring requirements in Sections 64423, 64424, 64425, and 64426.9, a public water system shall perform special purpose bacteriological monitoring as follows:

(1) After any system pressure loss to less than five psi. Samples collected shall represent the water quality in the affected portions of the system; and

(2) For a groundwater (not GWUDI) source that is treated with a primary or residual disinfectant on a continuous basis and is not monitored pursuant to Section 64654.8(b)(1)(B):
(A) A raw water sample shall be collected each calendar quarter, with samples collected during the same month (first, second, or third) of each calendar quarter; and

(B) If the raw water sample is total coliform-positive, a raw water sample shall be collected each month. If no coliforms are detected for a minimum of three consecutive months, a public water system may submit a request to the State Board to monitor in accordance with subparagraph (A).

(c) A public water system shall maintain documentation that the personnel performing sample collection and/or field tests under this Article have been trained pursuant to Section 64415(b). As a minimum, the documentation shall include the name and qualifications of the personnel who will be performing the sample collection and/or field tests.

(d) Plans, procedures, and requests to be submitted by a public water system to the State Board under this Article shall be in writing. For a request, the system shall state what is being requested, the basis for the request, and include any documentation to support the request.

1. Repealer of subsection (h), deletion of former subsection (i) designator and relettering of following subsections and amendment of NOTE filed 11-12-91 as an emergency; operative 11-12-91 (Register 92, No. 8). A Certificate of Compliance must be transmitted to OAL 3-11-92 or emergency language will be repealed by operation of law on the following day.
2. Repealer of subsection (h), deletion of former subsection (i) designator and relettering of following subsections and amendment of NOTE refiled 3-6-92 as an emergency; operative 3-11-92 (Register 92, No. 15). A Certificate of Compliance must be transmitted to OAL 7-9-92 or emergency language will be repealed by operation of law on the following day.
3. Certificate of Compliance as to 3-6-92 order transmitted to OAL 5-5-92 and filed 6-16-92 (Register 92, No. 25).
4. Amendment filed 7-1-92; operative 7-31-92 (Register 92, No. 28).
5. Editorial correction of HISTORY 2 (Register 95, No. 47).
6. Change without regulatory effect amending subsections (a)(3)-(4) and NOTE filed 6-2-2015 pursuant to section 100, title 1, California Code of Regulations (Register 2015, No. 23).
7. Repealer of subsections (a) and (b)(1-4), new subsection (a), amendment of subscetions (b) and (b)(1) and new subsections (b)(2), (b)(2)(A-B) and (c-d) filed 5-28-2021; operative 7-1-2021 (Register 2021, No. 22).

Note: Authority cited: Sections 116271 and 116375, Health and Safety Code. Reference: Section 116375, Health and Safety Code.

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