43 C.F.R. § 414.5 – Water quality.

(a) Water Quality is not guaranteed. The Secretary does not warrant the quality of water released or delivered under Storage and Interstate Release Agreements, and the United States will not be liable for damages of any kind resulting from water quality problems. The United States is not under any obligation to construct or furnish water treatment facilities to maintain or improve water quality except as may otherwise be provided in relevant Federal law.
(b) Required water quality standards. All entities, in diverting, using, and returning Colorado River water, must:
1. (1) Comply with all applicable water pollution laws and regulations of the United States, the Storing State, and the Consuming State; and
2. (2) Obtain all applicable permits or licenses from the appropriate Federal, State, or local authorities regarding water quality and water pollution matters.