Water Conservation Regulations

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Cal Water list of prohibited water uses:

  1. Use of water that results in flooding or run-off in gutters or streets;
  2. Washing of vehicles without positive action shut-off nozzles;
  3. Use of water for washing hard-surfaced areas;
  4. Use of water for street cleaning;
  5. Use of water for construction purposes, unless no other method can be used;
  6. Use of water for filling decorative lakes or ponds, unless necessary to sustain aquatic life;
  7. Use of water for decorative fountains unless using a recirculation system;
  8. Use of water for filling swimming pools
  9. Service of water by any restaurant, except upon the request of the patron.

For more information on prohibited water uses, visit Cal Water's site. (full text of Cal Water "Water Conservation and Rationing Plan" available here)


Additional Conservation Measures Announced March 17, 2015 by the State Water Resources Control Board:

  1. No irrigating of turf or ornamental landscapes during and within 48 hours following measurable precipitation
  2. Restaurants and other food service establishments can only serve water to customers on request
  3. Urban water suppliers must now limit the number of days per week that customers can irrigate outdoors. The limit must either be specified in their drought contingency plans; or if their plan contains no specific limit, irrigation is limited to no more than two days per week.

Full text of March 17, 2015 press release is available here


Regulations Dealing with Water Conservation That May Be Relevant for Portola Valley Residents:


Landscape Efficiency Standards

Stormwater Control Requirements C.3i

Water Conservation Ordinance - Indoor

Water Conservation Ordinance - Outdoor

Water Conservation Ordinance - Outdoor - FAQs