The highest-ranking tap water in the study belonged to Kansas City, which had no recorded pollutants when tested.

Following in rank for best tap water quality are, in order, Portland; Louisville; San Francisco; Memphis; San Antonio; Oklahoma City; Fort Worth; Jacksonville; and, rounding off the top 10, Arlington, Texas.

Data was unavailable for Honolulu, New Orleans, New York, and Virginia Beach. However, we know that Honolulu's water is quite good -- naturally filtered through its volcanic rocks. Cleaner air quality goes hand in glove with better tap water quality. New York's water is known to be fairly clean from the source as well, as it flows from the Catskill and Croton area watersheds. Of interest to New Orleans residents, in May 2006, the state Health Department said water was safe to drink in the Ninth Ward, which received the heaviest flood damage from Hurricane Katrina. The quality of Virginia Beach tap water quality is unknown, as it was not available in Environmental Working Group's national database from December 2005.

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