Res 2021-134/approving the submittal of the amended 2019 revised Water Conservation and Drought Response Plan to the Texas Water Development Board

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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 2008 the plant was expanded to operate at 21 MGD in order to accommodate additional users not of San Marcos. The facility currently produces about 6.40 MGD for San Marcos, supplying about eighty percent of the City's water needs. The City maintains about 283 miles of water pipelines, ranging in size from 1.5 inch diameter water lines to 30 inch diameter mains. Nine storage tanks provide a combined storage capacity of approximately 5.9 million gallons. The City maintains approximately 231 miles of wastewater collection mains, with 43 lift stations. The mains deliver wastewater to a 9 MGD wastewater treatment plant. Because much of the treated wastewater is discharged into the San Marcos River, the City is required to use advanced tertiary treatment in order to meet the 5-5-6-2-1 treatment quality standard. 3.0 Customer Profile The City of San Marcos Water/Wastewater Utility currently provides water service to a population of 71,153 residents. The population is projected to double by 2058 and to exceed 170,000 by 2070 (Figure 1). Water service is provided to approximately 12,942 system connections. About 86% of the connections are classified as Residential users, which includes single-family homes, duplexes, triplexes and fourplexes, apartment communities, and mobile home parks. The residential user class consumes about 56% of the annual water supply. The Commercial classification makes up about 11 % of total connections and is comprised of service establishments such as restaurants, hotels, retail stores, and offices. Commercial users consume approximately 24% of the annual supply. Governmental and Institutional users, about 3% of the customer base, include local, state, and federally owned facilities and community organizations such as schools, churches, and medical facilities. This user class consumes about 9% of the annual water supply. San Marcos has only 35 Industrial accounts which use only a small fraction of the annual supply.