Tidewater Utilities, established in 1964, supplies water on a retail basis to more than 30,000 customers in over 400 residential communities throughout Delaware. The company operates nearly 80 water plants and approximately 150 wells. Its subsidiary, Tidewater Environmental Services, offers a range of water and wastewater services, including consulting, maintenance and bulk water supply. Tidewater Utilities also provides online bill payment options. The company offers fire protection services. It issues an annual water quality report. In addition, the company operates White Marsh Environmental Systems. It regularly tests water for more than 100 contaminants. Tidewater Utilities is a part of Middlesex Water Company, which was founded in 1897.