Miami-Dade Water & Sewer Department (MDWSD) provides high-quality drinking water and wastewater services to Miami-Dade County’s 2.3 million residents and thousands of visitors. With more than 7,700 miles of underground water lines, 6,200 miles of sewer lines, they seek to promote water conservation and work to safeguard public health and the environment. Their drinking water is regularly tested to ensure its quality surpasses federal, state and local standards.