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Charlotte Thomas——Studied at the University of Johannesburg, Lives in Johannesburg, South Africa.
The US Geological Survey has identified
Florida,
Indiana,
Wisconsin,
Utah,
new Mexico, and
Arizona as states whose untreated ground water is very hard. Moderately hard water - again, untreated - is found in
Montana,
Idaho,
Nevada,
California,
Texas,
Oklahoma,
Kansas,
Illinois,
Michigan, and
Ohio.
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