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Round Rock is home to approximately 62,000 people. Nine of the District's dams (Dams #10B, #11, #12, #13A, #15, #16, #17, and #19) are within Round Rock's city limits or extraterritorial jurisdiction (ETJ).

Leander is home to approximately 15,000 people. Four of the District's dams (Dams #1, #2, #3, and #5) are within Leander's city limits or extraterritorial jurisdiction.

Cedar Park is home to approximately 30,000 people. Three of the District's dams (Dams #4, #7, and #6) are within Cedar Park's city limits or extraterritorial jurisdiction.

Hutto is home to approximately 1,200 people. Four of the District's dams (Dams #18, #20, #21, and #22) are within Hutto's extraterritorial jurisdiction.

Two of the District's dams (Dams #8 and #9) are within Austin's northwestern city limits or extraterritorial jurisdiction.

Williamson County Government

Formerly known as the Soil Conservation Service (SCS), the NRCS is responsible for assisting owners of America's private land with conserving their soil, water, and other natural resources by providing technical assistance, financial incentives, and cost sharing opportunities with local conservation districts. The NRCS is the federal partner with the District.

Formerly known as the Texas Natural Resource Conservation Commission (TNRCC), the TCEQ is the lead environmental agency for the State of Texas and administers rules for the design and evaluation of dams, issues NPDES permits, and issues permits for construction within the recharge zone and contributing zones of the Edwards Acquifer.

The TSSWCB is the lead agency for the planning, management and abatement of agricultural and silvicultural nonpoint source pollution and offers technical assistance to the state's 216 soil and water conservation districts.

The TWDB is the state agency charged with statewide water resources planning and administration of low-interest financial programs for the planning, design and construction of water supply, wastewater treatment, flood control and agricultural water conservation projects.

The USACE serves the nation through water resources, environmental, infrastructure, disasters, and warfighting services. The USACE is the major federal regulatory agency in evaluation, design, and construction of dams and in issuing section 404 permits for construction within the waters of the United States and within wetlands.