California Administrative Code

A source that exceeds one or more of the secondary MCLs in Table 64449-A and does not have a waiver may be used only if the source meets the requirements in Section 64414, and the community water system: (a) Meters the source's monthly production and submits the results to the St…

(a) A water system shall give public notice pursuant to this section and section 64465 if any of the following occurs: (1) Violation of the E. coli MCL (as specified in section 64426.1(b)) (2) Violation of the MCL for nitrate, nitrite, or total nitrate and nitrite, or when the wa…

(a) Each water system shall mail or directly deliver one copy of the Consumer Confidence Report to each customer. (b) The system shall make a good faith effort to reach consumers who are served by the water system but are not bill-paying customers, such as renters or workers, usi…

(a) Using the monitoring and calculation methods specified in sections 64534, 64534.2, 64535, and 64535.2, the primary MCLs for the disinfection byproducts shown in table 64533-A shall not be exceeded in drinking water supplied to the public. Disinfection Byproduct Maximum Contam…

(a) Except as provided in subsection (b), analyses required pursuant to this chapter shall be performed by laboratories certified by the State Board to perform such analyses pursuant to Article 3, commencing with section 100825, of Chapter 4 of Part 1 of Division 101, Health and …

(a) Systems not meeting any of the criteria identified in sections 64536(a) or (b) shall comply with requirements contained in sections 64536.2(a) or (b) and shall calculate compliance quarterly, beginning after the system has collected 12 months of data, by determining an annual…

(a) Systems required to sample quarterly or more frequently, pursuant to section 64534.2, 64534.4, or 64534.6, shall report to the State Board within 10 days after the end of each quarter in which samples were collected according to section 64469(c), notwithstanding the provision…

“Maximum day demand (MDD)” means the amount of water utilized by consumers during the highest day of use (midnight to midnight), excluding fire flow, as determined pursuant to Section 64554.

“Peak hour demand (PHD)” means the amount of water utilized by consumers during the highest hour of use during the maximum day, excluding fire flow, as determined pursuant to Section 64554.

“User service line” means the pipe, tubing, and fittings connecting a water main to an individual water meter or service connection.

(a) For a supplier using an approved surface water, as defined in section 64651.10, this chapter establishes treatment techniques in lieu of maximum contaminant levels for turbidity and the following microbial contaminants: Giardia lamblia (cysts), viruses, heterotrophic plate co…

“Coagulant chemical” means a floc-forming agent that has been demonstrated to provide coagulation.

“Comprehensive performance evaluation (CPE)” means a review and analysis of a treatment plant's performance-based capabilities and associated administrative, operation, and maintenance practices.

“Conventional filtration treatment” means a series of treatment processes which includes coagulation, flocculation, sedimentation, and filtration resulting in substantial particulate removal.

“Direct filtration treatment” means a series of processes including coagulation, flocculation, and filtration but excluding sedimentation.

“Disinfection” means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents.

“Disinfection profile” means a summary of Giardia lamblia or virus inactivation through the treatment plant.

“Filter-to-waste” means a provision in a filtration process to allow the first filtered water, after backwashing a filter, to be wasted or reclaimed.

“Filtration” means a process for removing particulate matter from water by passage through porous media.

“Flocculation” means a process to enhance agglomeration or collection of smaller floc particles into larger, more easily settleable or filterable particles through gentle stirring by hydraulic or mechanical means.

“Lake/reservoir” means a natural or man-made basin or hollow on the Earth's surface in which water collects or is stored that may or may not have a current or single direction of flow.

“Multibarrier treatment” means a series of water treatment processes that provide for both removal and inactivation of waterborne pathogens.

“Nephelometric Turbidity Unit (NTU)” means a measurement of the turbidity of water as determined by the methods in 40 Code of Federal Regulations, part 141.74(a)(1) (67 Fed. Reg. 65888 (October 29, 2002)), which is incorporated by reference.

“Plant intake” means the works or structures at the head of a conduit through which water is diverted from a source (e.g., river or lake) into the treatment plant.

“Pressure filter” means a pressurized vessel containing properly sized and graded granular media.

“Residual disinfectant concentration” means the concentration of the disinfectant in milligrams per liter (mg/l) in a representative sample of water.

“Sedimentation” means a process for removal of settleable solids before filtration by gravity or separation.

“Slow sand filtration” means a process involving passage of raw water through a bed of sand at rates not to exceed 0.10 gallons per minute per square foot resulting in substantial particulate removal by physical and biological mechanisms.

“Uncovered finished water storage facility” means a tank, reservoir, or other facility used to store water that will undergo no further treatment to reduce microbial pathogens except residual disinfection and is directly open to the atmosphere.

“Virus” means a virus of fecal origin which is infectious to humans by waterborne transmissions.

“Watershed” means the area contained in a drainage basin which is tributary to a water supply diversion point.

(a) A supplier using an approved surface water shall provide multibarrier treatment that meets the requirements of this chapter and reliably ensures at least, between a point where the raw water is not subject to recontamination by surface water runoff and a point downstream befo…

(a) A supplier that uses an approved surface water shall meet all of the requirements of this section to avoid the necessity of providing filtration. Within 18 months of the failure of a supplier using an approved surface water to meet any one of the requirements of subsections (…

A supplier that uses conventional filtration or direct filtration and recycles spent filter backwash water, thickener supernatant, or liquids from dewatering processes shall: (a) Provide the State Board with the following information in writing: (1) Plant schematic showing the or…

(a) All approved surface water utilized by a supplier shall be provided with continuous disinfection treatment sufficient to insure that the total treatment process provides inactivation of Giardia lamblia cysts and viruses, in conjunction with the removals obtained through filtr…

(a) Suppliers that propose to construct new filtration and disinfection treatment facilities or to modify or make additions to existing treatment facilities which require permit approval from the State Board pursuant to Health and Safety Code sections 116525 through 116550 shall …

(a) All treatment plants utilizing an approved surface water shall be operated by operators certified by the State Board in accordance with Health and Safety Code section 106885. (b) Filtration facilities shall be operated in accordance with the following requirements: (1) Conven…

(a) A supplier shall operate each treatment plant in accordance with an operations plan that has been approved by the State Board. With a permit application for a new treatment plant or modification to an existing treatment plant, the supplier shall submit for State Board review …

(a) A supplier shall maintain accurate and complete operation records for each treatment plant that treats an approved surface water. The records shall include but not be limited to the following: (1) The results of all monitoring conducted in accordance with sections 64654.8, 64…

A supplier shall notify the State Board as soon as possible, but no later than by the end of the next business day, or within 24 hours, whichever is less, by telephone or other equally rapid means whenever: (a) A combined filter effluent turbidity exceedance occurs pursuant to ta…

(a) Once a month, samples shall be collected at sampling locations representative of: (1) municipal wastewater that feeds the DPR project at a location after secondary wastewater treatment and prior to the treatment processes pursuant to section 64669.50, or at an alternate locat…

(a) The source water for a DPR project shall be municipal wastewater. (b) There shall be no bypass constructed around required treatment processes for municipal wastewater from the DPR project to the distribution system. (c) A DiPRRA shall enable and facilitate the inspection by …

(a) No later than six months after the end of each calendar year, a DiPRRA shall provide an annual report to the State Board and to each public water system receiving DPR project water that contains the following: (1) A summary of the compliance status of the DPR project with the…

(a) A DiPRRA shall demonstrate that it and all partner agencies possess technical, managerial, and financial capacity sufficient to comply with the joint plan and with this Article. The demonstration shall include the following: (1) Identification of those project elements in the…

(a) Any facility that provides treatment pursuant to section 64669.45, 64669.50, or 64669.110 is a water treatment plant pursuant to Health and Safety Code section 116275(w) and is subject to operator certification requirements contained in Title 22, Division 4, Chapter 13, in ad…

Municipal wastewater used in a DPR project shall receive continuous treatment pursuant to this section prior to entering a water distribution system of a public water system. (a) The DPR project treatment train shall be designed and constructed to comply with the following: (1) T…

“WQP monitoring” means sampling conducted pursuant to sections 64680 (General WQP Monitoring Requirements), 64681 (Initial WQP Monitoring), and 64682 (WQP Monitoring Requirements after CCT Installation).

(a) The requirements in this section are applicable to all small and medium-size water systems. (b) Each small and medium-size system shall conduct standard tap sampling for lead and copper pursuant to section 64675 (General Requirements for Tap Sampling for Lead and Copper). Tap…

(a) Each system shall identify a pool of sampling sites that: (1) Is large enough to ensure that the water system can collect the number of lead and copper tap samples required in section 64675 (General Requirements for Tap Sampling for Lead and Copper); (2) Meets the criteria in…

(a) A lead or copper sample may be invalidated by the Department if at least one of the following conditions is met and documented in writing: (1) The laboratory establishes that improper sample analysis caused erroneous results; (2) The Department determines that the sample was …