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Washington Suburban Sanitary Commission
Potomac, Maryland
Project Background
The Washington Suburban Sanitary
Commission (WSSC) is the 8th largest
water and wastewater utility in the nation,
serving nearly 1.8 million residents and
approximately 460,000 customer accounts
in the Prince George’s and Montgomery
counties over an area of nearly 1,000
square miles. They operate and maintain
eight water and wastewater plants, more
than 5,500 miles of fresh water pipeline
and nearly 5,400 miles of sewer pipeline.
In 2010, the WSSC selected Energy Systems
Group (ESG), a specialized energy services
and performance contracting company
(ESCO), to complete comprehensive
energy efficiency and infrastructure
improvements for the Potomac Water
Filtration (WFP) Plant in Potomac, Maryland.
ESG will implement over $6.3 million
of critical infrastructure upgrades that
include the installation of the newest
advances in technology to reduce the
WSSC raw water pumping annual energy
usage by 13%. ESG guarantees that
energy savings over the defined 15-year
term of the performance contracting
project will cover the costs of energy and
infrastructure improvements, averaging
about $562,300 in energy savings annually.
Strategies & Solutions
The project consists of rebuilding six
50MGD pumps, reconditioning six 2000hp
motors and the installation of metering
instrumentation for the 25 pumps in
the RawWater, Main Zone and High
Zone pumping stations. Key installed
technologies include large two-stage
vertical and horizontal turbine pumps
and large synchronous electric motors.
Environmental Benefits
This sustainable project will reduce the
WSSC’s carbon footprint by more than 3,500
tons of carbon dioxide and will provide
annual environmental benefits equivalent
to the removal of emissions from more than
600 cars or the planting of about 8,100 trees.
Annual Energy Savings
over $560,000
WSSC Headquarters in Laurel, Maryland
ESG is an award-winning energy services company that provides its customers with
innovative energy efficiency, technology, and long-term financing solutions for
modernization of their facilities and energy infrastructure.
© 2012 Energy Systems Group, LLC. All rights reserved.