UWM Plan - Municipal Water District of Orange County

Section 2
Water Demand
with purchased imported water, storm water, and recycled water. OCWD further protects
the groundwater basin from seawater intrusion through the injection of imported and
recycled water along the coast, known as the Talbert Injection Barrier.
Since demands for replenishment for groundwater basin storage and seawater barriers are
driven by the availability of supply to the groundwater basin in Orange County, the
demand forecast for this type of use is based on the projection of the following supplies
under normal conditions:
• Santa Ana River Flows;
• Incidental Recharge;
• Replenishment (surplus) supplies from Metropolitan; and
• Recycled Supplies for replenishment use.
Table 2-5 shows the historical amount used for indirect consumption in MWDOC’s
service area.
Table 2-5: Historical Water Demands for Indirect Water Use in MWDOC’s
Service Area (AFY)
Fiscal Year Ending
1990 1995 2000 2005
Total Demand 168,000 193,000 228,000 161,000
2.4. SBx7-7 Requirements
2.4.1. Overview
SBx7-7, The Water Conservation Act of 2009, was signed into law on February 3, 2010,
as part of a comprehensive water legislation package. As discussed above, the bill sets a
goal of achieving a 20% statewide reduction in urban per capita water use, and directs
urban retail water suppliers to develop targets to meet a 20% reduction in per capita water
use by 2020, and an interim 10% reduction by 2015. Water suppliers receive partial
credit for past efforts in conservation and deductions for direct and indirect use of
recycled water. As a result not all agencies need to reduce demand by 20% in order to
comply with the legislation. A retail agency that does not comply with the requirements
of SBx7-7 will not be eligible for water related grants or loans from the state on and after
July 16, 2016. However, if an agency is not in compliance documents a plan and obtain
funding approval to come into compliance they could become eligible for grants or loans.
As a wholesale water supplier, MWDOC is not required to establish and meet targets on
its own. MWDOC’s role implementing the legislation is to assist each retail water
supplier in Orange County in analyzing the requirements and establishing their baseline
and target water use, as guided by DWR under the Methodologies for Calculating
Municipal Water District of Orange County
2010 Regional Urban Water Management Plan
Final
2-7