San Mateo Municipal Code Ch. 26.36 Drainage

(a) Drainage and drainage structures shall be adequate in design so as to protect lots and streets from flood hazard under standards set forth in the design standards and specifications and as they may from time to time be amended, and as governed by the drainage phase of the public services and facilities element of the general plan.

(b) Wherever feasible, drainage from individual lots shall be to the street frontage, provided such design does not require amounts of grading in conflict with the purposes of this title, or in hillside areas where the natural grade on the downhill side of the street does not make such drainage feasible.

(c) Under no circumstances shall drainage facilities be connected with the sanitary sewerage system.

prior code § 139.20(h)(1)

In the event that the subdivision is traversed by a watercourse, stream, channel or creek, or is shown on the drainage phase of the public services and facilities element of the general plan, the subdivider shall dedicate rights-of-way or easements for storm drainage purposes substantially conforming to the aforementioned; or the subdivider shall, by dedication, provide further and sufficient rights-of-way or easements as may be required for drainage facilities for the disposal of surface and stormwaters.

prior code § 139.20(h)(2)