Engineering Design Manual - Loudoun Water

Chapter 1: Loudoun Water’s Role
A. Central System
Loudoun Water’s Central System consists of an integrated water distribution and a
wastewater collection system. Among the communities served are Sterling, Dulles,
Lansdowne, Ashburn, Broadlands, Brambleton, South Riding, and Stone Ridge.
Water is purchased on a wholesale basis from Fairfax Water, and from Fairfax City’s Goose
Creek Treatment Plant. To meet future demand, Loudoun Water has also embarked on the
task of securing a withdrawal of water from the Potomac River, for treatment at a new facility
that is to be constructed in the coming decade.
Wastewater is treated at the Blue Plains Facility, belonging to the District of Columbia Water
and Sewer Authority (DCWASA). To accommodate recent and future growth, Loudoun
Water’s Broad Run Water Reclamation Facility was placed into service in 2008, whereupon it
began to treat a portion of the flow.
The limits to which the Central System may be extended are depicted by Figure 1.1. This
system may be extended within the Suburban and Transition Policy Areas, as outlined in
Loudoun County’s Comprehensive Plan.
B. Community Systems
Loudoun Water owns and operates various stand-alone water and sewer systems, located
throughout the County, and shown on Figure 1.1. Generally known as Community Systems,
each is of small scale and functions with an independent water source and treatment, or
independent wastewater treatment and discharge. Community Systems serve at least ten
premises. In accordance with the County’s Comprehensive Plan, each Community System
has a limited service area, beyond which it may not serve.
C. Systems Not Belonging to Loudoun Water
The Towns of Leesburg, Hamilton, Purcellville, Lovettsville, Round Hill, Hillsboro, and
Middleburg own their respective public water and sewer systems. These systems are
generally within the corporate limits of the respective town, but may also extend into an
associated Joint Land Management Area, in accordance with Loudoun County’s
Comprehensive Plan. Connections to these systems are not regulated by Loudoun Water.
Applicants for service from these systems should consult the respective town for permits and
inspections. Typically the underground building sewer tributary to these systems is
inspected by Loudoun County’s Plumbing Department, under the appropriate County
Plumbing Permit.
A privately owned water system serving a number of customers exists in the Village of Aldie,
and another in the Potomac Farms Subdivision.
D. Private Facilities
Unless it is within a town’s Joint Land Management Area, areas colored grey on Figure 1.1
are rural in nature, and do not have access to water or sewer service from a public utility.
Buildings with plumbing are typically connected to privately owned wells and wastewater
Engineering Design Manual
September 2010 3