The City of Mesquite purchases surface water from the North Texas Municipal Water District (NTMWD). The NTMWD serves more than 1.6 million people across 90 communities in 10 counties. NTMWD gets raw water from Lavon Lake and treats it at the Wylie Water Treatment Plant. In addition to Lavon Lake, NTMWD also obtains raw water from Lake Texoma on the Texas-Oklahoma border and the East Fork Water Reuse Project, located along the East Fork of the Trinity River. NTMWD also has water rights to, and obtains raw water from, Jim Chapman Lake (originally named Cooper Lake) on the South Sulpher River in Delta and Hopkins counties and Lake Tawakoni on the Sabine River in Rains and Van Zandt counties. To meet future water demands, NTMWD began construction of a new lake, Bois d'Arc Lake, in June 2018, located in Fannin County. The new NTMWD Lake will eventually provide 120,000 acre-feet of water per year to residents in North Texas.