Each year we report the the Massachusetts Department of Environmental Protection how much water was used per person per day. Topsfield residents that rely on teh public water system 50.5 gallons per day per person during calendar year 2010. We are required by DEP to use less than 65 gallons per day per person.
This year's value is slightly lower than 2009's which is mainly due to a change in the way we calculate the population served. We used to rely on prorating the Town Census results over the number of residential lots served by the public system compared to those that use private wells. This year the population was calculated by taking the number of households served and multiplying it by the average number of people per household in Topsfield.
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