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Water Conservation Plan <br />for the City of San Marcos, Texas <br />1.0 Introduction <br />The objectives of the City of San Marcos Water Conservation Plan (the Plan) are to <br />improve efficiency of water use and to decrease per capita consumption in order to provide <br />additional water supplies for future growth. Projections for the San Marcos area indicate that by <br />2038 current water supplies may be insufficient to meet the needs of a rapidly growing <br />population. To address future water needs the City is investigating several water supply <br />strategies including purchase of additional water rights, conservation of existing water resources, <br />and reuse of existing resources. The City of San Marcos Water Supply Master Plan and South <br />Central Texas (Region L) Water Planning Group have identified conservation of existing <br />resources as an essential water management strategy for San Marcos and the south central Texas <br />region. <br />The City of San Marcos currently utilizes both surface and ground water resources to <br />meet its water needs. The majority of the water, about eighty percent, is obtained from Canyon <br />Lake under contract with the Guadalupe Blanco River Authority (GBRA). The City is presently <br />able to withdraw up to 10,000 acre-feet annually from Canyon Lake under the terms of the <br />contract. The remainder of the City water supply is pumped from the Edwards Aquifer, which <br />prior to 1999 was the sole water source for San Marcos. The City has a permit to use up to 5,433 <br />