The State Water Board is actively developing numeric water quality objectives to protect the MUN and REC-1 beneficial uses from four cyanotoxins: microcystins, cylindrospermopsin, anatoxin-a, and saxitoxins. In addition, they are working on a narrative water quality objective for harmful algal blooms, along with a program of implementation to achieve both the numeric and narrative objectives. For ongoing updates about this project, please refer to the following link: Harmful Algal Blooms Water Quality Objectives for California Inland Surface Waters, Enclosed Bays, Estuaries, and Coastal Lagoons | California State Water Resources Control Board.
I highly recommend subscribing to the Freshwater Plans and Policies Email List for notifications about upcoming meetings. You can do so here: Biostimulatory Substances and Biological Integrity Provisions | California State Water Resources Control Board. The subscription box is on the upper right-hand corner of the page.
Regarding the current Basin Plan Amendment, the deadline for tribes to submit designation requests and provide water use information is December 2026. We have a meeting scheduled with Region 1 and Region 2 staff on June 5th, and I will follow up with you and other Mishewal Wappo Tribe representatives after that meeting to share any relevant updates.