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About Our Water System


The NTMWD acts in accordance with its mission to meet
the current and future water supply needs of its Member
Cities and Customers. More than 1.6 million citizens rely
on the treated water supply provided by the NTMWD. The
NTMWD is a regional wholesale provider of potable water,
with rates set at cost, no profits included, and no taxes


Lavon Lake serves as the NTMWD’s main raw water
supply source, with the NTMWD holding water rights in
the reservoir. Lavon Lake also serves as a terminal
reservoir for additional supplies that are transferred to
the reservoir to augment supplies. The NTMWD holds
water rights for raw water supplies from Lavon Lake,
Lake Texoma, Jim Chapman Lake, Lake Bonham, and
the East Fork Raw Water Supply Project, commonly
referred to as the Wetland. Additional supplies are
available through a contract with the Sabine River
Authority, providing for water transfer to Lavon Lake
from Lake Tawakoni, and from a contract with the
City of Dallas for additional interim supplies.


Future water supplies will need to be developed to meet
the water demands of a population estimated to exceed
3.8 million by 2060. Through the statewide water planning
process, the NTMWD has identified numerous water
management strategies that are included in the 2012 State
Water Plan. Conservation, the wise and efficient use of
current water supplies, and reuse strategies are
estimated to comprise more than 22 percent of the future
water supply. Even if the “highest practicable levels” of
conservation and reuse are met, these strategies alone
will not be sufficient to support the projected rapid growth
expected within the NTMWD service area. Research
completed by the Texas Water Development Board has
shown that on a state and local level, the more
knowledgeable consumers are regarding their water
source and supplies, the more likely they are to use this
finite resource wisely and efficiently. To facilitate water-
efficient behaviors, the NTMWD continues to promote the state’s recognized public awareness and water conservation program, “Water IQ” (WIQ), providing water source information in addition to sensible water-saving tips.


During the 2011-2012 Water Year (August 2011 – July 2012), NTMWD treated and delivered 96.8 billion gallons of water, a 5.14% decline as compared to 102.1 billion gallons delivered during the 2010-2011 Water Year. The Lavon Lake area began experiencing a drought in May 2010, and continued to be in a La Nina weather pattern from that point well into 2012. During the summer months of 2011, the Water System set record delivery demands with an all-time high delivery of 582 million gallons within one day. The triple digit temperatures also set a national record for the longest number of days above 100 degrees Fahrenheit. After much needed rainfall, Lavon Lake returned to full conservation pool level in mid-March 2012 and remained near that level through May 2012.

In response to the ongoing drought and the loss of 28% of NTMWD's total water supplies from Lake Texoma due to the presence of an invasive species, zebra mussel, NTMWD continued to reinforce the water resources management strategies within its Drought Contingency and Water Emergency Response Plan to facilitate water use reductions. During the 2011-2012 Water Year, the Member Cities of the Water System utilized 84% of the total supply delivered with the remaining 16% being utilized by the Customers.


During the 2011-2012 Operations Year (October 2011 - September 2012), Water System construction contracts totaled over $696 million. Major projects included the Lake Texoma Outfall to Wylie Water Treatment Plant (WTP) Raw Water Pipeline; Water Treatment Plants (WTPs) I, II, III, and IV Ozonation implementation; and the Lake Tawakoni WTP.

The construction of the Lake Texoma Outfall to Wylie WTP Raw Water Pipeline will allow NTMWD to transport water from Lake Texoma directly to the Wylie WTPs for treatment. This pipeline will restore the Texoma supply while minimizing the spread of zebra mussels. The Lake Tawakoni WTP provides additional treatment capacity to the eastern service area of the NTMWD. Another major water system project was the enhancement of the water treatment process at the Wylie WTPs which will include ozonation. Once the ozonation project is completed in 2014, NTMWD will operate the largest ozone water treatment plant in the United States.

Expansions and modifications increasing water delivery were made to High Service Pump Station 3-1 to 350 MGD; expansion of the Frisco/McKinney Pump Station to 130 MGD; 55 MGD expansion to the Lake Jim Chapman Pump Station; and an installation of a second 50 MGD pump and improvements at the Apollo Pump Station.

Construction projects to the Wylie WTPs included: Residuals removal, WTP IV Conversion to Biologically Active Filtration; Chlorine Scrubber for WTPs I and II; and WTP III Filter Underdrain improvements.
Additional construction projects included the Wylie-to-Garland 42-inch Waterline Relocation along Merritt Road at President George Bush Turnpike; waterline relocations for both the 24-inch and 20-Inch Pipelines along SH 78 from Kreymer Ln. in Wylie to FM6 in Lavon; U.S. Highway 380 14-inch Waterline Relocation, Lake Lavon to Farmersville; 14-inch and 60-inch Waterline Relocation along Brown Street from Ballard Avenue to FM 1378; the Wylie-Rockwall-Farmersville 36-inch Pipeline Relocation along East Brown Street, and the replacement of the Plano/Richardson Westside Pipeline. Other projects included security enhancements and several electrical and power improvements at various locations.


Water Consumption Pie Chart
Water Consumption Bar Chart

Water System Member Cities







Royse City


Water System Customers

Ables Springs WSC

Caddo Basin SUD
Cash SUD
College Mound SUD
Copeville SUD
Crandall (Kaufman Four-One)
East Fork SUD



Forney Lake WSC

Gastonia-Scurry SUD

Kaufman Four-One

Lavon SUD

Little Elm


Milligan WSC
Mt. Zion WSC

Nevada WSC

North Collin WSC


Rose Hill SUD

Seis Lagos UD
Wylie N.E. SUD