Skip to content

Chapter 4.64 — WATER SUPPLY SYSTEM

San Mateo County Municipal Code · 2026-09 edition · updated 2026-09-27 · San Mateo County

4.64.010 - "Water supply system" defined.

The term "water supply system" shall include all works, facilities, and the like designed, constructed, or employed to collect, store, treat, or distribute water intended for domestic use by 200 or fewer customers.

(Prior code § 4650; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.020 - "Health hazard" defined.

The term "health hazard" means any condition or practice connected with the provision of water for domestic use which poses significant danger to the health of any water consumer. Said term includes, but is not limited to, dangers to health posed by sanitary defects.

(Prior code § 4651; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.030 - "Sanitary defects" defined.

The term "sanitary defect" means any faulty condition, whether of location, design or construction of collection facilities, treatment works, or distribution works, which may regularly or occasionally prevent satisfactory purification of the water supply, or allow it to be contaminated or polluted.

(Prior code § 4652; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.040 - Standards for water for domestic use.

Every Person, firm, or corporation which either owns or operates a water supply system in whole or in part shall supply water therefrom free from contamination and pollution, in compliance with the drinking water standards set by the National Primary Drinking Water Regulations published by the United States Environmental Protection Agency.

(Prior code § 4660; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.050 - Prohibition of health hazards and sanitary defects.

Every domestic water supply system shall be constructed and maintained free from health hazards and sanitary defects.

(Prior code § 4661; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.060 - Correction of health hazards and sanitary defects.

Where the County Health Officer determines a health hazard or sanitary defect to exist, he may order the owner or operator of the water supply system in which such hazard or defect occurs to take whatever steps are deemed necessary by the County Health Officer to insure the safety of the water supply and the protection of the public health. Every Person, firm, and corporation to which such order is directed shall immediately comply therewith.

(Prior code § 4662; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.070 - Disinfection of water mains.

No Person, firm, or corporation shall use any newly constructed water main or newly repaired section of an existing water main to supply water unless said Person, firm, or corporation has disinfected it in accordance either with Standards C-601-68 of the American Waterworks Association or with an equivalent procedure approved by the County Health Officer. Said new or repaired main shall be flushed thoroughly before and after chlorination.

(Prior code § 4663; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.080 - Direction to chlorinate or disinfect.

Every Person, firm, or corporation which either owns or operates in whole or in part a water supply system shall, at the direction of the County Health Officer, cause to be cleansed and chlorinated or chemically disinfected any reservoir, tank, well, spring, or pipe from which water is dispensed either for domestic use or human consumption.

(Prior code § 4670; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.090 - Dosage for chemical disinfection.

When the purity of water in a water supply system is maintained by means of chemical disinfection, the dosage or rates of application shall at all time be sufficient to provide adequately disinfected water at all points of the distribution system. The County Health Officer may order continuous automatic disinfection

for any water supply, when, in his opinion, such treatment is necessary for the protection of the public health.

(Prior code § 4671; Ord. 2413, 01/11/77)

Exceptions & meaning →

4.64.100 - Dosage for chlorination.

When the purity of water supply system is maintained by means of continuous chlorination, the chlorine shall be added in sufficient quantity to insure the bacteriological safety of the water at all points in the distribution system. A free chlorine residual shall be maintained at all times at chlorine control sampling points approved by the County Health Officer.

(Prior code § 4672; Ord. 2413, 01/11/77)

Exceptions & meaning →

Get a plain-English answer with a citation back to this text.

Ask AI about this code
▸Contents — San Mateo County Municipal Code

GoCodebook provides public access, search, citation, multilingual explanation, and practical interpretation of legally adopted building regulations. It is not a substitute for the official ICC or California code publications.