Issue link: http://townofcary.uberflip.com/i/1498729
C A RY, N O RT H C A R O L I N A A N N U A L WAT E R Q U A L I T Y R E P O R T 2 0 2 2 4 S U P P LY D I S T R I B U T I O N T R E AT M E N T CLASS OF 2022 4 1 J O R DA N L A K E 10 9 8 7 3 2 1 6 5 W H E R E D O E S O U R WAT E R C O M E F R O M ? OUR DRINKING WATER SOURCE IS THE B. EVERET T JORDAN RESERVOIR, MORE COMMONLY KNOWN AS JORDAN LAKE, WHICH LIES APPROXIMATELY 10 MILES WEST OF CARY IN EASTERN CHATHAM COUNT Y. The lake is a surface water supply developed and managed by the US Army Corps of Engineers and is part of the Cape Fear River basin. In addition, Cary maintains water system interconnections with the City of Raleigh, Town of Holly Springs and the City of Durham, to ensure adequate water supply in the event of an emergency. 1 Pump Station: Powdered activated carbon is added to our source water, Jordan Lake, and pumped 6 miles to our Cary/ Apex Water Treatment Facility where additional powdered activated carbon may be added. 10 Distribution System: Water is pumped through underground water pipes in our community to water storage tanks and over 1,000 miles of smaller pipes. Elevated water tanks help maintain water pressure, ensure water is available for fire protection, and help us meet daily variations in water use. 2 Ozonation: Ozone is used to oxidize organics, remove color, and to treat taste and odors. 3 Mixing: Aluminum sulfate and polymer are added in our Rapid Mix to help particles stick together. 4 Clarification: Water is pulsed up from the bottom of our SuperPulsators where floc collects on the baffles and the clean water goes out through the collection channels at the top. 5 Ozonation: There is an option for additional ozonation of the settled water. 6 Disinfection: As water flows to our filters, chlorine in the form of liquid bleach is added for disinfection. 7 Filtration: Water flows down through layers of sand and carbon in our filters, where additional particles are removed from the water. 8 Post Treatment: We add fluoride for dental health and chemicals to adjust the pH (acidity) of the water and for corrosion control in our water pipes. 9 Clearwell: Filtered water is put in clearwells for disinfection and storage until it is ready to be used. Chlorine and ammonia are added separately to form chloramines, which disinfects the water.