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EF/ ICR Logo National Source Water (Untreated) Levels of Total Coliform
APRIL 1998



REMINDER: Data Purpose: The ICR data were collected as part of a national research project to support development of national drinking water standards. They should NOT be used to determine local water systems compliance with drinking water standards, nor should they be used to make personal judgements about health risks.


National Source Water (Untreated) Levels of Total Coliform for APRIL 1998

National Source Water (Untreated) Levels of Total Coliform for APRIL 1998

Level of Total Coliform (Total Coliforms/100mL) Number of Water Treatment Plants
0 37
1-9 50
10-99 95
100-999 91
1,000-9,999 54
OVER 10,000 8


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