Central Texas Water Supply Corporation Incorporates Online THM Monitor to Better Manage Disinfection By-Product Formation The CTWSC produces 21.8 mgd of water to service customer demand using three treatment plants; two conventional and one ultrafiltration. The Stillhouse Hollow Lake, the primary water source for the CTWSC WTP , is of relative good water quality with a total organic carbon (TOC) of 4 mg/L. However,

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