Plano cares about the quality of our water. Plano’s water system has a “Superior” rating with the Texas Commission on Environmental Quality (TCEQ), and it exceeds all state and federal drinking water standards. We work together with our residents and fellow North Texas Municipal Water District Opens a New Window. member cities to provide reliable and safe water for your everyday use. Visit the links below to learn more about our water, ways to conserve, water quality and how to pay your bill. Opens a New Window.