Chapter 4 (commencing with Section 116275) of Part 12 of Division 104 of the Health and Safety Code shall not apply to districts except in specific areas concerning which the State Department of Health Services gives written notice to the district.

In areas where the service rendered by the district is primarily agricultural and domestic service is only incidental thereto, the State Department of Health Services may prescribe reasonable and feasible action to be taken by the district and the consumers to insure that their domestic water will not be injurious to health.

Municipal and public corporations or utilities, other than a district, that distribute water within a district are not excepted from Chapter 4 (commencing with Section 116275) of Part 12 of Division 104 of the Health and Safety Code by this section.