The Town of Cary produces drinking water from Jordan Lake at a treatment plant that it owns with the Town of Apex. Treatment capacity increased to 40 million gallons per day with expansion that was completed in 2002. The plant has been in compliance with regulatory standards since opening in 1993.

The water plant is six miles from Jordan Lake, which is part of the Cape Fear River basin.

Annual Reports

The Drinking Water Quality Report is provided for water customers annually as required by the U.S. Environmental Protection Agency. It summarizes test results, health effects information, and other important information about Town water programs.

The Water Treatment Lab Summary is a comprehensive laboratory report containing test results for all parameters for finished water from the Cary/Apex Water Treatment Facility and distribution system.

Water Quality Testing

Town utility customers periodically receive solicitation for water testing by private companies.  In response to these mass mailings, it is important to note that annually, tens of thousands of water samples are taken from all parts of the water distribution system and tested by the Town to ensure drinking water meets or surpasses all state and federal regulatory standards. Results of our testing, along with additional water quality information, can be found in the Town’s annual Drinking Water Quality Report and Water Treatment Lab Summary.  While customers may periodically receive solicitations offering various services related to their water quality like private testing, the Town of Cary is not affiliated with these companies or their offerings. Cary utility customers should weigh the merits of the program, but are under no obligation or requirement to participate.

Treatment Process

The Cary/Apex Water Treatment Plant uses a relatively new process with special concrete treatment basins called Super-Pulsator Flocculator Clarifiers for removing particles from the water. Each Super-Pulsator Clarifiers can treat up to 8 million gallons of water a day. These devices save money because they require less space than conventional sedimentation basins.

The basins use a vacuum chamber for pulsing action as water flows upward, becoming clearer as larger particles settle. Pulsing prevents particles from settling completely, and over time these particles form a blanket that helps filter water as it flows upward through the basins. The plant also has 10 multi-media filters that remove finer particles. Ozone is used to disinfect, remove organics, and control taste and odor. Ammonia and chlorine are added for final disinfection except each March when ammonia is suspended.

Fluoride is added as the federally recommended level of 0.7 parts per million at the customer's tap.


safewaterCary has received the Directors Award of recognition from the Partnership for Safe Drinking Water, an association of water utilities and government, for going far beyond federal requirements in an effort to achieve excellence in water quality.


The Partnership for Safe Water

American Water Works Association

U.S. Environmental Protection Agency – Ground and Drinking Water

NC Department Environmental Quality

Administrative Contact Hours: 8:00 am to 5:00 pm Monday through Friday

Alexandra Jones, Water System Manager
Utilities Department
(919) 362-5504

1400 Wimberly Road
Apex, NC 27523
PO Box 8005
Cary, NC 27512-8005

For general information and college tours: (Tours are temporarily suspended due to plant construction)

Sophie Carr, Administrative Assistant
(919) 362-5502

For water quality information: 
Rachel Monschein, WTP Lab Supervisor
(919) 362-5507