Hexavalent Chromium MCL (SWRCB-DDW-21-003)
Hexavalent Chromium MCL Announcements and InformationInformation and Documentation Pertaining to This Regulatory Proposal
Status of Proposal
This rulemaking is in progress.
- A hearing was held on August 2, 2023
- Written comments are due August 18, 2023
Proposed MCL: 10 ppb (0.010 mg/L)
Proposed DLR: 0.1 ppb (0.0001 mg/L)
This MCL includes a compliance schedule based on water system size and requirements to submit compliance plans and operations plans under certain conditions. See the rulemaking documentation below for details.
Inquiries regarding the contents of these regulations may be directed to Bethany Robinson (Bethany.Robinson@waterboards.ca.gov) and Melissa Hall (Melissa.Hall@waterboards.ca.gov).
Rulemaking Documentation
45-Day Comment Period Documentation
- Notice of Proposed Rulemaking
- Text of Proposed Regulations
- Initial Statement of Reasons (ISOR) - ISOR Errata
Final Documentation
- TBD
Complete Rulemaking Documentation Files
CEQA Documentation
- Draft Environmental Impact Report
- Notice of Availability of Draft Environmental Impact Report
- Notice of Completion of Draft Environmental Impact Report
Peer Review Documents
History of Rulemaking Proceedings
- Standardized Regulatory Impact Assessment (SRIA) Submitted to Department of Finance: 13 December 2022
- Notice of Proposed Rulemaking Published: 16 June 2023
- Close of the 45-Day Public Comment Period: 04 August 2023
- Date of Scheduled Public Hearings: 02 August 2023
- Date Filed with Office of Administrative Law: TBD
- Approved by Office of Administrative Law: TBD
- Filed with the Secretary of State: TBD
- Effective Date: TBD
Sections Affected
California Code of Regulations: Title 22 Sections: 64415, 64431, 64432, 64447.2, 64465, and 64481.