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Biostimulation, Cyanotoxins, and Biological Condition Provisions

The State Water Resources Control Board (State Water Board) is considering statewide water quality objectives for nutrients, other biostimulatory substances, and cyanotoxins, and a program of implementation under the Biostimulation, Cyanotoxins, and Biological Condition Provisions (Provisions). The Provisions could include statewide numeric or narrative water quality objectives and regulatory control options for point and non-point sources in California’s freshwater wadeable streams and rivers, non-wadeable streams and rivers, lakes, and reservoirs. The Provisions may also establish and implement biological condition assessment methods, scoring tools, and targets aimed at protecting the biological integrity (biointegrity) in California’s wadeable streams. The Provisions will be established as state policy for water quality control and will include a water quality control plan component.

Current Announcements

July 14, 2022 Public Workshop


June 23, 2022 – Revised Notice of Public Staff Workshop

Technical Documents & Tools

  Link to Archived Nutrient Objective Workplans and Technical Documents

  Link to Archived Information from the Biological Integrity Plan Project

Public Meetings

Advisory Groups Information

Other Nutrient Related Efforts:

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Staff Contacts