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Western Wake Regional Wastewater Project, North Carolina

Site Area

220 acres (88ha)

New Plant Capacity

18 million gallons (US) a day (mgd), expandable to 30mgd

Anticipated Flow at Start


Completion of the Water Reclamation Facility



5.8 (2011), 10.5 (2020), 16.3 (2030)


2.9, 6.2, 9.9


1.0, 1.5, 2.3

Existing capacity (in mgd)

North Cary

8.1 (current);12 (maximum permitted)

South Cary

7.8; 12.8


2.8; 3.6

Holly Springs

1.1; 2.4

Cape Fear River discharge capacity

24mgd (Phase I)

Sludge treatment

Aerobic (mixed)

Sludge detention period

20 days

Anticipated sludge production at start up

8 tonnes/day

Project cost

$380 Million

Strategic planning initiative began

July 1997

Wake county water/sewer plan adopted

September 1998

Regional studies project commissioned

May 2002

Phase I study

November 2002 – September 2003

Phase II study

October 2003 – July 2004

Land acquired

Summer 2006

Final EIS submitted to State

Late autumn 2006

NPDES permit issued by NCDENR

Summer 2007

Plant design phase completed

Autumn 2007

Construction begins

Early 2008

Phase I completed

Late 2010

Plant operation begins

January 2011

Phase II completed

Summer 2020

Project partners

Apex, Cary, Holly Springs & Morrisville

Lead partner


Additional key participants

Fuquay-Varina and Wake County

Consulting engineers

CDM, Hazen & Sawyer and CH2M HILL

Plant design

Arcadis / CH2MHill

Permitting bodies

North Carolina Department of the Environment and Natural Resources (NCDENR); North Carolina Environment Management Commission (NCEMD)

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