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Published online by Cambridge University Press: 10 May 2017
Demands on the public water supply “industry” have been increasing steadily. Most of the existing systems have experienced increased water use per customer over time, as well as a greater number of customers. There has also been a growing interest in and concern about providing adequate quantities of safe, treated water for all of the Nation's population. The cost of providing public water systems for “an estimated 30,000 smaller communities, unincorporated settled areas and farming sectors in rural territory without systems” was estimated at $6 billion in 1966 [1, p. 978]. The cost of completing this task has probably increased, even though many water systems have been installed in these communities since 1966.