Cal. Pub. Util. Code § 13574
Whenever a discharge of waste water is in violation of the district's regulations or otherwise causes or threatens to cause a condition of contamination, pollution or nuisance, as defined in this article, the district may petition the superior court for the issuance of a preliminary or permanent injunction, or both, as may be appropriate, restraining the continuance of such discharge. In any civil action brought under this section, it shall not be necessary to allege or prove at any stage of the proceedings that irreparable damage will occur should the temporary restraining order, preliminary injunction or permanent injunction not be issued or that the remedy at law is inadequate and the temporary restraining order, preliminary injunction or permanent injunction shall issue without such allegations and without such proof.
Ca. Pub. Util. Code § 13574