The definitions of a public water system and different types of
public water systems are given below. These definitions are in
Section 116275 of the California Safe Drinking Water Act which is
contained in Part 12, Chapter 4 of the California Health and Safety
Code. The link at the bottom of this page is to a compilation of
California statutes related to drinking water including the
California Safe Drinking Water Act.
water system” means a system for the provision of water for
human consumption through pipes or other constructed
conveyances that has 15 or more service connections or
regularly serves at least 25 individuals daily at least 60 days out
of the year. A public water system includes the following:
(1) Any collection, treatment, storage, and distribution facilities
under control of the operator of the system that are used primarily
in connection with the system.
(2) Any collection or pretreatment storage facilities not under the
control of the operator that are used primarily in connection with
(3) Any water system that treats water on behalf of one or more
public water systems for the purpose of rendering it safe for human
consumption” means the use of water for drinking, bathing or
showering, handwashing, oral hygiene, or cooking, including, but not
limited to, preparing food and washing dishes.
connection” means the point of connection between the
customer’s piping or constructed conveyance, and the water system’s
meter, service pipe, or constructed conveyance. A connection to a
system that delivers water by a constructed conveyance other than a
pipe shall not be considered a connection in determining if the
system is a public water system if any of the following apply:
(1) The water is used exclusively for purposes other than residential
uses, consisting of drinking, bathing, and cooking or other similar
(2) The department determines that alternative water to achieve the
equivalent level of public health protection provided by the
applicable primary drinking water regulation is provided for
residential or similar uses for drinking and cooking.
(3) The department determines that the water provided for residential
or similar uses for drinking, cooking, and bathing is centrally
treated or treated at the point of entry by the provider, a pass
through entity, or the user to achieve the equivalent level of
protection provided by the applicable primary drinking water
water system” means a public water system that serves at least
15 service connections used by yearlong residents or regularly
serves at least 25 yearlong residents of the area served by
water system” means a public water system that is not a
community water system.
noncommunity water system” means a public water system that is
not a community water system and that regularly serves at least 25 of
the same persons over six months per year.
means a person who physically occupies, whether by ownership, rental,
lease, or other means, the same dwelling for at least 60 days of the