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Lal<e under contract with the Guadalupe Blanco River Authority (GBRA). The City is presently able to withdraw up to 5,750 acre-feet annually from Canyon Lake under the terms of the contract. The remainder of the City water supply is pumped from the Edwards Aquifer, which prior to 1999 was the sole water source for San Marcos. The City has a permit to use up to 5,222 acre-feet of Edwards Aquifer groundwater per year, with reductions in permitted amounts scheduled to take effect in 2008. Permitted withdrawals are also reduced during critical periods when aquifer levels fall below certain triggers. The agencies that govern these resources require preparation and implementation of effective water conservation plans. In addition to providing for the needs of a rapidly growing population, this Plan fulfills the requirements of the agencies that govern use of state waters. Texas Administrative Code (TAC) 30, Chapter 288, Subchapter A, enforced by the Texas Commission on Environmental Quality (TCEQ), requires submission of water conservation plans from each municipal user of state surface water. The Edwards Aquifer Authority (EAA) Rules, Chapter 715, Subchapter C, Part 1 require water conservation plans from municipal users of Edwards Aquifer groundwater. This Plan also meets the requirements of 31 T AC, Chapter 363.55, which requires that participants in the Texas Water Development Board (TWDB) State Revolving Loan program submit and maintain an active water conservation plan. 2.0 System Profile The City of San Marcos Water/Wastewater Utility is comprised of several components including a groundwater and surface water production and treatment system, water distribution system, wastewater collection system, and wastewater treatment system. Over 50 City employees work to maintain and develop these systems. The groundwater system is comprised of seven Edwards Aquifer wells. This system includes several wells from the former Elim Water System which was purchased by the City in 1997. On average, the wells produce 1.9 MGD, providing approximately thirty percent of annual water usage. The Regional Surface Water Treatment Plant began operation in January 2000 and has helped to drastically reduce the City's reliance on the Edwards Aquifer. The 20 mile long raw water pipeline and water treatment facility are operated and maintained by the GBRA. In 2004, the City expanded the plant to operate at a 9 MGD capacity. The GBRA is currently expanding 2