This publication provides the complete text of Title 23 (Waters) of Barclays Official California Code of Regulations (CCR), which contains compliance information for water handling and treatment. Topics include water quality control plans, wastewater treatment plans, and environmental water acts. Divisions include:

• Central Valley Flood Protection Board
• Flood Plain Management (Department of Water Resources and Reclaimation Board)
• Department of Water Resources
• State Water Resources Control Board and Regional Water Quality Control Boards
• Regional Water Quality Control Boards
• Prevention of Waste, Unreasonable Use or Diversion of Water (State Water Resources Control Board and Department of Water Resources)
• Delta Stewardship Council

Updates are provided as required by law.