116362.
(a) On or before July 1, 2025, the Office of Environmental Health Hazard Assessment shall prepare and publish, pursuant to subdivision (c) of Section 116365, a public health goal for manganese.(b) After the Office of Environmental Health Hazard Assessment publishes a public health goal for manganese pursuant to subdivision (a), the state board shall do both of the following:
(1) Adopt, pursuant to subdivisions (a) and (b) of Section 116365, a primary drinking water standard for manganese.
(2) (A) Establish for the primary drinking
water standard standard, as defined in subdivision (c) of Section 116275, for manganese adopted pursuant to paragraph (1), and for the period before the primary drinking water standard for manganese is adopted, appropriate monitoring requirements for manganese that shall include, but are not limited to, all of the following:
(i) Routine distribution system monitoring.
(ii) Distribution system monitoring after flushing activities.
(iii) Monitoring when water is discolored or after a customer complains of discolored water.
(B) The monitoring requirements described in clauses (i) and (ii) of subparagraph (A) shall not be construed to limit the state board’s authority to order distribution system monitoring for contaminants, other than manganese, that have secondary drinking water standards.
(c) On or before January 31, 2024, the state board shall consider establishing, pursuant to Section 116456, a notification level and response level for manganese that would remain in place until the state board adopts a primary drinking water standard for manganese pursuant to paragraph (1) of subdivision (b).
(d) Before the state board adopts a primary drinking water standard for manganese pursuant to paragraph (1) of subdivision (b), the state board may
continue to do both of the following:
(1) Require a community water system, through general or individual orders, to monitor manganese in its source water and within its distribution system.
(2) Provide funding for treatment, source protection, and alternative water supplies. To the extent authorized by the funding source, the state board may use exceedances of the secondary drinking water standard for manganese in the source water or within the distribution system of a community water system as a basis to prioritize funding.