346563918_133cf8085c_sBy Emily Qiu, Elissa Trieu, and Sarah Mitchell on May 31, 2008
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How Municiple Water is Treated Over Time > Clear Percent with No Treatment

Year Percent with No Treatment Percent with Primary Treatment Percent with Secondary Treatment
Clear Clear Clear Clear
2004-2005 27.0% 2.0% 71.0%
2000-2001 29.0% 42.0% 29.0%
2002-2003 32.0% 2.0% 66.0%
1998-1999 34.0% 40.0% 26.0%
1996-1997 46.0% 28.0% 26.0%
1994-1995 47.0% 33.0% 20.0%