California Code, Water Code - WAT § 71670

A district may acquire, construct, and operate facilities for the collection, treatment, and disposal of sewage, waste, and storm water of the district and its inhabitants.

For purposes of this article, “waste” is as defined in subdivision (d) of Section 13050, and also includes any and all aquatic vegetation, except riparian vegetation, which threatens or adversely affects the quality of the waters within the district.  “Quality of the waters” is as defined in subdivision (g) of Section 13050.  “Disposal of sewage” includes the sale or resale of treated effluent for any purpose.

The district may prescribe, revise, and collect rates or other charges for the services and facilities furnished pursuant to this article.

The amendment to this section enacted at the 1977-78 Regular Session of the Legislature is declaratory of and does not constitute a change in existing law.