On June 16, 2023, the Division of Drinking Water (DDW) posted the enclosed Notice of Proposed Rulemaking (NPRM) proposing a Maximum Contaminant Level (MCL) of 10 µg/L for hexavalent chromium (CrVI). There will be a 45-day public comment period. CrVI Notice of Proposed Rulemaking
DDW will hold a public hearing on August 2, 2023 at 1:00 pm. The deadline to submit public comments is August 4, 2023.
Also enclosed, please find a copy of DDW’s Initial Statement of Reasons (Proposed CrVI MCL ISOR ), and the Initial Statement of Reasons (ISOR) Attachment 1 (cost tables). (ISOR Attachment 1 Cost Tables )
Additional attachments for the ISOR can be found at the following website (scroll down to the heading “Rulemaking Documentation”):
https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/SWRCBDDW-21-003_hexavalent_chromium.html
