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City of San Mateo Municipal Code.


(a) The Director may approve discharge to the sanitary sewer from swimming pools, spas, whirlpools, fountains and landscape water features on a case-by-case basis. A person who desires to drain such facility to the sanitary sewer system shall first obtain permission from the Director prior to discharge if discharge volume is greater than 1,000 gallons or the flow rate is anticipated to exceed 20 gallons per minute. Permission shall be granted if the discharge conforms to discharge standards and will not cause a hydraulic overload condition in the sewer system.

(b) If the user has no connection to the City's sewer system available, these waters may be surface discharged provided the following conditions are met: (1) The discharge of the water shall not contain residues of algaecides, disinfectants or other toxic chemical constituents that may violate any water quality regulation; (2) The discharge of the water shall not create a public nuisance; (3) The discharge of the water shall in no way damage, destroy, erode, or impair surrounding property; and (4) The user has obtained permission from the Director for the discharge.

(c) In the event that discharge to the sanitary sewer and storm drain is disallowed, the waters must be disposed at a legal disposal site. The person conducting the discharge shall be required to provide proof of disposal upon City's request.