True or False: The river that supplies water to the reservoir serving Houston carries about 50% wastewater effluent from Dallas.

The statement is accurate because a significant portion of the water supplied to Houston's reservoir originates from the Trinity River, which indeed receives a considerable amount of wastewater effluent from various cities, including Dallas. As urban areas manage their water resources, treated wastewater is often discharged into rivers and can become part of the water supply system downstream.

This practice is part of a broader water management strategy that helps ensure a reliable water supply while also addressing challenges like drought or increased urban demand. It reflects a growing trend in water resource management where cities reuse and recycle water to enhance sustainability.

In this case, stating that about 50% of the flow includes effluent underscores the intertwined relationship between urban centers in terms of water quality and supply. It highlights the importance of understanding regional hydrology and the impacts of wastewater management on water resources.