2020 City of Southlake Water Quality Report

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Southlake’s Water Source The City of Southlake gets all of its water from the City of Fort Worth’s Water Department. Fort Worth obtains water from surface water sources: Lake Worth, Eagle Mountain Lake, Lake Bridgeport, Richland Chambers Reservoir, Cedar Creek Reservoir, and the Clear Fork Trinity River (from Lake Benbrook). Fort Worth owns Lake Worth. The U.S. Army Corp of Engineers is responsible for Lake Benbrook. The other four lakes are owned and operated by Tarrant Regional Water District (TRWD).

TCEQ ASSESSES RAW WATER SUPPLIES The Texas Commission on Environmental Quality (TCEQ) completed an assessment of Fort Worth’s, and subsequently, Southlake’s source waters. TCEQ classified the risk to our source waters as high for most contaminants. High susceptibility means there are activities near the source water watershed that make it very likely chemical constituents may come into contact with the source water. It does not mean there are any health risks present. TRWD, from which the Southlake ultimately purchases its water, received assessment reports. For more information on source water assessments and protections efforts at our system contact Southlake Water Utilities at 817-748-8082. Further details about the source water assessments are available at www.tceq.texas.gov/gis/swaview.

Further details about sources and source water assessments are available through the Texas Commission on Environmental Quality at www.tceq.texas.gov/drinkingwater.

Water Loss, as Reported to the Texas Water Development Board Every year the City of Southlake is required to report water loss to the Texas Water Development Board (TWDB). This is non-metered water used in fire hydrant protection, water line flushing for health and safety, and other activities. Water loss also includes water lost to leaks, line breaks, and other uncontrollable flow. We reported a loss of approximately 11 gallons per water account in 2019. One of the most important tools in accurately measuring water loss and ensuring accurate utility billing is the water meters throughout the City. The large production meters that measure the incoming water purchased from the City of Fort Worth are tested and calibrated at least once per year. The Southlake Water Utilities’ goal is to conform to the American Water Works Association (AWWA) meter accuracy standard of 98.5% to 101.5%.

Trinity River Authority of Texas Tarrant Water Supply Project In accordance with the requirements of §290.272. Content of the Report. (g)(6) “Systems that use an interconnect or emergency source to augment the drinking water supply during the calendar year of the report must provide the source of the water, the length of time used, an explanation of why it was used, and whom to call for the water quality information.” The Trinity River Authority of Texas-Tarrant Water Supply Project supplied water to Fort Worth through an emergency interconnection. The water was supplied from Jan. 15 through Jan. 18 and Feb. 26 through Feb. 28, as repayment for water supplied to TRA in a previous year for a pipeline rupture.

WATER QUALITY REPORT 2020 | CITY OF SOUTHLAKE

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