Cal. Codes » Water Code / DIVISION 7. WATER QUALITY / CHAPTER 3. State Water Quality Control / ARTICLE 3. State Policy for Water Quality Control
California Codes

Cal. Water Code § 13140 (2026)

State Policy for Water Quality Control

✓ current as of May 2026
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The state board shall formulate and adopt state policy for water quality control. Such policy shall be adopted in accordance with the provisions of this article and shall be in conformity with the policies set forth in Chapter 1 (commencing with Section 13000).

Notes of Decisions
Cited in 11 cases (5 in the last 5 years), 1992–2025 · leading case: City of Rancho Cucamonga v. Reg'l Water Quality Control Bd., 36 Envtl. L. Rep. (Envtl. Law Inst.) 20026 (Cal. Ct. App. 2006).
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City of Rancho Cucamonga v. Reg'l Water Quality Control Bd., 36 Envtl. L. Rep. (Envtl. Law Inst.) 20026 (Cal. Ct. App. 2006). “(Wat. Code, §§ 13140, 13200 et seq., 13240, and 13301.”
Cnty. of Los Angeles v. Comm'n on State Mandates, 37 Envtl. L. Rep. (Envtl. Law Inst.) 20107 (Cal. Ct. App. 2007). “) establishes a statewide program for water quality control.”
City of Sacramento v. State Water Resources Control Bd., 2 Cal. App. 4th 960 (Cal. Ct. App. 1992). “(Wat. Code, §§ 13140, 13200 et seq.) Under the Porter-Cologne Act, the regional boards are required to formulate water quality control plans for the state’s 16 water basins.”
Valley Water Mgmt. v. Superior Court CA5 (Cal. Ct. App. 2023). · cites it 2× “(Wat. Code, §§ 13140, 13160.) Nine regional water quality boards operate under the purview of the State Board, and the State Board and regional boards are collectively responsible for protecting water quality in the state.”
CA Sportfishing Prot. All. v. Allison (E.D. Cal. 2022). · cites it 2× “18 §§ 1313(c)(2)(A), 1342; Cal. Water Code §§ 13140 , 13240. 19 The Clean Water Act includes a citizen suit provision, 20 allowing citizens to bring a civil action “against any person 21 .”
Camarillo Sanitary Dist. v. State Water Resources Control Bd. (Cal. Ct. App. 2025). · cites it 2× “) The Toxicity Provisions Were Properly Adopted as a State Policy Appellants claim the Toxicity Provisions are not properly adopted as a state policy for water quality control under Water Code sections 13140 and 13142 because the State Board did not adequately demonstrate the…”
State Water Resources Control Bd. v. Baldwin & Sons, Inc. (Cal. Ct. App. 2020). “(Wat. Code, §§ 13140, 13200, 13201, 13240.”
City of Duarte v. State Water Resources Control Bd. (Cal. Ct. App. 2021). “(Wat. Code, § 13140.) The Regional Water Quality Control Board, Los Angeles Region (Regional Board), is a regional agency created pursuant to the provisions of Water Code section 13200 et seq.”
City of Duarte v. State Water Resources Control Bd. (Cal. Ct. App. 2021). “(Wat. Code, § 13140.) The Regional Water Quality Control Board, Los Angeles Region (Regional Board), is a regional agency created pursuant to the provisions of Water Code section 13200 et seq.”
State Dept. of Fin. v. Com. on State Mandates (Cal. Ct. App. 2013). “(Wat. Code, §§ 13140, 13200 et seq., 13240, 13301.”
State Dept. of Fin. v. Com. on State Mandates (Cal. Ct. App. 2013). “(Wat. Code, §§ 13140, 13200 et seq., 13240, 13301.”
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