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Vista Irrigation District Water Supply Reliability Self-Certification Data and Analysis

On May 18, 2016, the State Water Resources Control Board (State Board) revised their emergency regulations to allow individual water agencies (or regions as a whole) to replace mandated conservation standards with a supply based approach. The new regulations require water agencies to self-certify the level of available water supplies assuming three additional dry years. No minimum conservation standard is required for agencies or regions that can self-certify that projected supplies will meet demands.

As noted above, under the new regulations, agencies may certify supply sufficiency on an individual or regional basis. All San Diego County Water Authority (Water Authority) member agencies agreed to certify as a region. On June 21, 2016, the following data and analysis was submitted to the State Board:


Worksheet 1: Total Available Water Supply for Individual Water Supplier Worksheet 2: Calculation for Aggregated Self-Certification Conservation StandardSan Diego County Water Authority’s Supporting Analysis of Water SuppliesVista Irrigation District's Supporting Analysis of Local Water Supply Resolution Approving Regional Certification for San Diego County Water Authority Member Agencies


The data and analysis submitted to the State Board demonstrates that the Vista Irrigation District has sufficient water supplies to meet demands over the next three years. Therefore, the Vista Irrigation District has no minimum conservation standard.