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Cary/Apex Water Treatment Facility Y our drinking water is produced at the Cary/Apex Water Treatment Facility, a plant co-owned by the towns of Cary and Apex and located on Wimberly Road in western Wake County. The facility has a current capacity of 40 million gallons per day (MGD) and utilizes a multiple barrier treatment approach. In this approach multiple processes are used within the treatment plant, including ozone, an advanced treatment process, as well as sediment removal, filtration, and disinfection processes. The result is the production of safe, high-quality drinking water for citizens that consistently surpasses all regulatory standards. Treated water is temporarily stored on-site at the facility and then pumped to water storage tanks located throughout town. The Town operates six elevated storage tanks and one ground-level storage tank. Water system storage provides reliable and continuous water supply during peak demand periods while also providing for emergency storage, consistent water system pressure, and fire protection. Facility Expansion In an effort to provide for adequate water supply and meet the needs of Town water customers in the future, a project is currently underway to expand the Cary/Apex Water Treatment Facility to a capacity of 56 MGD. This expansion project will provide additional treatment units for sediment removal, filtration, and ozonation, as well as upgrade the facility's chemical feed systems and water pumping capacity. The project is currently underway and construction is expected to be completed in 2017. SUPPLY TREATMENT DISTRIBUTION 1 JORDAN LAKE 3 4 9 5 6 10 2 7 8 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. Pump Station – Powdered activated carbon is added to our source water, Jordan Lake, and is pumped to our Cary/ Apex Water Treatment Facility where additional powdered activated carbon may be added. Ozonation – Ozone is used to oxidize organics, remove color and to treat taste and odors. Mixing – Aluminum sulfate and polymer are added in our Rapid Mix to help particles stick together. 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. Ozonation – There is an option for additional ozonation of the settled water. Disinfection – As water flows to our filters, chlorine in the form of liquid bleach is added for disinfection. Filtration - Water flows down through layers of sand and carbon in our filters, where additional particles are removed from the water. 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. 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. 1 2 3 4 5 6 7 8 9 10 Lead in Home Plumbing I f present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. We are responsible for providing high-quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at www.epa.gov/lead.

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