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Table 1 Part of database of participant addresses and water source information Information for four participants is shown. For each change in address or primary source of water a new row is entered in the database. Therefore there are 16 rows in this sample database.

From: Visualization and exploratory analysis of epidemiologic data using a novel space time information system

Year moved in Year moved out Sample ID City Primary Source of Water
9/12/1935 1/1/1953 1 Swartz Creek Private well
1/1/1956 1/1/1958 1 Swartz Creek Private well, softener
1/1/1958 1/1/1963 1 Swartz Creek Private well
1/1/1963 1/1/1974 1 Swartz Creek Private well, reverse osmosis
1/1/1974 1/1/1990 1 Swartz Creek new private well
1/1/1990 1/1/2002 1 Swartz Creek Community Supply
1/1/2002 1/1/2004 1 Swartz Creek Community Supply, softener
1/1/1976 1/1/1990 2 Livonia Community Supply
1/1/1990 1/1/2004 2 Brighton CS (township well and treatment plant)
1/1/1953 1/1/1961 3 Jackson Community Supply
1/1/1961 1/1/1971 3 Jackson Well (30 ft)
1/1/1971 1/1/1984 3 Michigan Centre Private well
1/1/1984 1/1/1993 3 Vandercook Lake Private well
1/1/1993 1/1/2004 3 Horton Well (280 feet)
1/1/1943 1/1/1958 4 Ferndale Community Supply
1/1/1982 1/1/2004 4 Waterford Community Supply