14 - Laserfiche WebLink

irrigation meter services to recycled water service since 2015. In 2015, the City also achieved its water use target of 222 GPCD with actual water use at 141 GPCD. City Water Supply Reliability The City's water supply reliability is largely dependent upon Zone 7's water supply reliability policy. As the provider of approximately 80 percent of the City's potable water supply, as well as the Tri-Valley Groundwater Manager, the seasonal and climatic shortages that impact Zone 7's water supplies directly affect the City's supply reliability and vulnerabilities. The quantity of water available to Zone 7 from different supply sources varies annually depending on hydrologic conditions. Consequently, in Zone 7's 2020 UWMP preparation, they reviewed historical data and developed a projected yield for each water supply source under three conditions: (1) normal water year, (2) single dry year, and (3) five-consecutive-year drought. Under each scenario, Zone 7 found that there is and will be adequate supply to meet the City's current and future demands through 2045. To strengthen delivery reliability, Zone 7 has in their current portfolio and is planning for future supply projects, including groundwater banking, water transfers, Chain of Lakes Project, Sites Reservoir Project, Regional Desalination, and Potable Reuse, although this option is not supported by City Council. Water Shortage Contingency Plan The Water Shortage Contingency Plan details the City's action plan for a drought or catastrophic water supply shortage. The current Water Shortage Contingency Plan has been updated to include the City's procedural steps and key data inputs, needed to conduct the AWSDA. Beginning July 1, 2020, the City will be required to submit the results of its AWSDA annually. The goal of the AWSDA is to forecast near-term supply conditions to assist the City in the potential preparation of any anticipated water supply constraints in a timely manner. Furthermore, results of the AWSDA can now serve as a water shortage trigger that could lead to City Council activation of a water shortage level. The water shortage levels have been adjusted to conform to the State's new six standard shortage levels, which specifies percentage of reduction in water use as follows: Stage Percent Shortage Range Voluntary or Mandatory Conservation 1 Up to 10% Voluntary 2 Up to 20% Voluntary or Mandatory 3 Up to 30% Mandatory 4 Up to 40% Mandatory 5 Up to 50% Mandatory 6 More than 50% Mandatory The City's Municipal Code Chapter 9.30 Water Management Plan, codifies the City's Water Shortage Contingency Plan implementation. Staff will bring forward modifications to PMC 9.30 within the coming months addressing DWR's six standard stage framework following the outcome of the City Council's approval to adopt the Water Shortage Contingency Plan. Page 3 of 4