In accordance with Section 864.5 of the revised Emergency Regulations from the State Water Resources Control Board, the documents below document Rainbow MWD's certified supply under the drought "stress test" conditions specified in the regulation.  These documents demonstrate that RMWD has sufficient supply for the three years ending in 2019 and beyond - even if drought conditions persist.   The investments made by San Diego County in water supply reliability have really paid off in this regard.

As always, the fact that we have supply does not mean that we can waste water.  All outdoor irrigation should be done in a responsible manner that avoids excess runoff.

Supporting Analysis & Calculations

The San Diego County Water Authority and its member agencies have sufficient water supplies to meet demands even during three additional dry years and won't be subject to State mandated water use reductions through 2017, according to Water Authority calculations.

On May 18, 2016, the State Water Resources Control Board (SWRCB) adopted a statewide water conservation approach that replaces the prior percentage-based water conservation standard.  The new standard requires water agencies to self-certify the level of available water supplies assuming three additional dry years.  Agencies that face a supply shortage after the third dry year will have a conservation standard equal to that shortage.

Under the new regulations, agencies may certify supply sufficiency on an individual or regional basis. All San Diego County Water Authority member agencies agreed to certify as a region.  On June 22, 2016, the following data and analysis was submitted to the SWRCB: 

Information about the drought emergency regulation is available at SWRCB Emergency Conservation Regulations