Founded in 1977 as Walnut Ridge Water Company, Hampstead Area Water Company is one of the largest privately owned water system s in New Hampshire. The company has established water systems in over 10 communities throughout southern New Hampshire. Hampstead Area Water Company is regulated by the New Hampshire Department of Environmental Services and the New Hampshire Public Utilities Commission. Its Web site offers tips for water conservation. Hampstead Area Water Company has a 0.5-million-gallon water storage tank in Hampstead, N.H. Its tank was built in association with Natgun Corporation, and provides fire protection and water pressure for the water system of Hampstead. Hampstead Area Water Company is located in Atkinson, N.H.