In observance of Thanksgiving, several Cary services will be unavailable or modified on Thursday & Friday, November 26 & 27. Facilities will remain closed, and curbside collection for Thursday will move one day later to Friday. GoCary will not operate on Thursday, but will resume normal operation schedule on Friday, November 27. Read more.

Water Supply and Demand

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Cary's main water supply is B. Everett Jordan Lake. Part of the lake's storage capacity is designated for water supply, and the State of North Carolina's Division of Water Resources, NCDEQ, allocates that water supply storage based on applications by water suppliers. As of March 2017, our allocations are:

  • Cary/Apex and RTP South: 46.2 percent of water supply storage, or 46.2 million gallons per day (MGD) average annual supply
  • Morrisville: 3.5 percent of water supply storage, or 3.5 MGD average annual supply
Other allocation holders include Chatham County, Durham and Orange Water and Sewer Authority.

The Cary/Apex Water Treatment Facility (C/A WTF) treats water from Jordan Lake for Cary, Apex, Morrisville, and RTP South. The C/A WTF also treats water for Durham on occasion for emergency needs. The facility has a maximum daily capacity of 56 MGD. 

Cary and Morrisville also have mutual support agreements with Durham to purchase water through our water system interconnections, if needed.

Rainfall data is from the Raleigh-Durham Airport vicinity and does not reflect local isolated showers. "T" stands for trace and is not measurable. 

Current Year:  2020

This page is updated weekly with the prior week's demand.

Previous year:  2019