Aрpellants are the owners of residences in the City of Concord served by the water system of respondent Contra Costa County Water District. Each of the appellants maintains on his property a well from which water is drawn for such purposes as gardening and car-washing. Although appellants had not connected their well water systems to the pipes of the district’s public system, the district threatens to terminate servicе until the affected householders agree to have installed, at their own expense, a “double check valve assembly,” designed to prevent water from the auxiliary supply from “backing up” into and contaminating the public water supply. Appellants sought from the court protection against the district’s threat; judgment was for the district, and the present appeal followed. We affirm the judgment.
The record shows without contradiction that contamination of a water system can occur if there is a physical connection between the public system and auxiliary water supply, such as where the two. systems are connеcted by pipes, or where the auxiliary water is “impounded” (e.g., in a swimming pool or fish pond) and an ordinary garden hose from the public water supply is allowed to lie in water from the auxiliary system. In the latter situatiоn a temporary loss of pressure can result in contaminated water being drawn into the public system.
Protection against this risk can be provided by installing in the consumer’s water meter box a device which prevents a backward flow of water. The directors of respondent district have established an installation charge of $35, and a $.25 per month maintenance charge, for such devices, based on the cost thereof to the district. Appellants receive no special benefit from the device other than that which they receive as members of the general public.
It will be useful to outline the statutory framework under which respondent is requiring the installation of the back flow prevention device. Health and Safety Code section 203 provides that the State Department of Public Health “shall examine and may prevent the рollution of sources of public domestic water . . . supply.” The department may “adopt and enforce rules and regulations” for this purpose. (Health & Saf. Code, § 208.) Pursuant to these statutes, the department adopted administrative regulations designed to prevent contamination or pollution of any public water supply as a result of “actual
or
potential cross-connections” with auxiliary water suppliеs. (Cal.Admin.Code, tit. 17, § 7583, italics added.) An auxiliary water supply is defined as “any water supply on or available to the premises other than the public water supply.” (Cal.Admin.Code, tit.
Appellants contend that the requirement that they install a protective device constitutes a taking of property which must be compensated. They argue that they have the right to take watеr from their wells and that respondent’s demand infringes on their right to use their property as they wish. This contention confuses an exercise of the police power with an exercise of the power of eminent domain; “the constitutional guarantee of just compensation attached to an exercise of the power of eminent domain does not extend to the state’s exercise of its police рower, and damage resulting from a proper exercise of the police power is simply
damnum absque injuria” (Lees
v.
Bay Area Air, etc. Control Dist.
(1965)
Appellants also argue thаt it is unreasonable to require them to pay for the cost of installation and maintenance as their property receives no special benefit from the prevention device. It is argued that, since the device is for the benefit of the public, the public should pay for it. A similar contention was made in
Atchison, Topeka & S. F. R. Co.
v.
Public Util. Com.
(1953)
Aрpellants next contend that the term “auxiliary water supply” used in the regulation is unconstitutionally vague, as it leaves the determination of what constitutes an auxiliary water supply to respondent’s unfettered discretion. Title 17, section 7590, of the California Administrative Code defines “auxiliary water supply” as “any water supply on or available to the premises other than the public water supply.” This definition is not so vague and ambiguous as to be unenforceable.
Appellants contend that due process entitled them to notice and a hearing before respondent could demand that they either install the device or have their water service discontinued. But respondent was merely enforcing a lawful state regulation in making the demand. State law requires that before the regulations could be adopted there must be notice and a hearing at which any interested person could appear to oppose the proposed regulations. (Gov. Code, § 11420 et seq.) There is no requirement that a new notice and hearing be given in each individual case before an agency can enforce a valid statute or regulation.
The judgment is affirmed.
Devine, P. J., and Rattigan, J., concurred.
