Water Supply Reliability Self-Certification

Supporting Analysis and 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:

The data and analysis submitted to the SWRCB demonstrate that the City of San Diego has sufficient water supplies to meet demands over the next three years. Therefore, the new conservation standard is a zero percent reduction.