Adoption of a Regulation for the Hexavalent Chromium Maximum Contaminant Level
4 Documents in Project
Summary
SCH Number
2021110099
Lead Agency
State Water Resources Control Board
Document Title
Adoption of a Regulation for the Hexavalent Chromium Maximum Contaminant Level
Document Type
NOD - Notice of Determination
Received
Posted
4/19/2024
Document Description
The State Water Board is proposing to adopt a primary drinking water standard for hexavalent chromium (Proposed Regulations) under the California Safe Drinking Water Act. The Proposed Regulations include a maximum contaminant level (MCL) for hexavalent chromium of 10 micrograms per liter (µg/L) and a detection limit for purposes of reporting of 0.1 micrograms per liter (µg/L). Public water systems, depending on type, would be required to monitor their drinking water for hexavalent chromium on an initial and ongoing basis. Public water systems would need to comply with the MCL according to a compliance schedule, and prepare Hexavalent Chromium MCL Compliance Plans, as required. The Proposed Regulations include three best available technologies for removing hexavalent chromium from drinking water sources, including reduction/coagulation/filtration, ion exchange, and reverse osmosis. Public water systems using new or modified treatment for hexavalent chromium would need to prepare Hexavalent Chromium Operations Plans. Public water systems are not limited to using best available technologies and may consider other means of compliance, such as blending, drilling a new well, increasing reliance on surface water, purchasing water from, or consolidating with another water system, or using another form of treatment such as stannous chloride. The Proposed Regulations also specify laboratory methods for analyzing hexavalent chromium in drinking water.
Contact Information
Name
Kimberly Niemeyer
Agency Name
State Water Resources Control Board
Job Title
Attorney IV
Contact Types
Lead/Public Agency
Phone
Location
Regions
Statewide
Other Location Info
Statewide
Notice of Determination
Approving Agency
State Water Resources Control Board, Division of Drinking Water
Approving Agency Role
Lead Agency
Approved On
Determinations
(1) The project will have a significant impact on the environment
Yes
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
No
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(5) A Statement of Overriding Considerations was adopted for this project
Yes
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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