Title 23 - Waters
- Division 1 - Central Valley Flood Protection Board (§§ 1 — 193)
- Division 1.5 - General Provisions (§§ 200 — 242)
- Division 2 - Department of Water Resources (§§ 301 — 638.6)
- Division 3 - State Water Resources Control Board and Regional Water Quality Control Boards (§§ 640 — 3895)
- Division 4 - Regional Water Quality Control Boards (§§ 3900 — 3991.1)
- Division 5 - Prevention of Waste, Unreasonable Use or Diversion of Water (State Water Resources Control Board and Department of Water Resources) (§§ 4000 — 4007)
- Division 6 - Delta Stewardship Council (§§ 5000 — 5035)
- Division 7 - California Water Commission (§§ 6000 — 6015)