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EF/ ICR Logo Source Water (Untreated) Levels of E. coli for
Regional Water Authority


Water System E. coli Report
REMINDER: Data Purpose: The ICR data were collected as part of a national research project to support development of national drinking water standards. The 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.


Source Water (Untreated) Levels of E. coli for Lake Gaillard Water Treatment Plant

Water Type Month E. coli Level (E.coli/100mL)
Surface Water JUL 1997 0
Surface Water AUG 1997 0
Surface Water SEP 1997 4
Surface Water OCT 1997 0
Surface Water NOV 1997 0
Surface Water DEC 1997 8
Surface Water JAN 1998 4
Surface Water FEB 1998 1
Surface Water MAR 1998 3
Surface Water APR 1998 0
Surface Water MAY 1998 15
Surface Water JUN 1998 0
Surface Water JUL 1998 4
Surface Water AUG 1998 33
Surface Water SEP 1998 0
Surface Water OCT 1998 4
Surface Water NOV 1998 1
Surface Water DEC 1998 1


Source Water (Untreated) Levels of E. coli for Lake Saltonstall Water Treatment Plant

Water Type Month E. coli Level (E.coli/100mL)
Surface Water JUL 1997 1
Surface Water AUG 1997 0
Surface Water SEP 1997 1
Surface Water OCT 1997 0
Surface Water NOV 1997 461
Surface Water DEC 1997 4
Surface Water JAN 1998 5
Surface Water FEB 1998 3
Surface Water MAR 1998 4
Surface Water APR 1998 2
Surface Water MAY 1998 5
Surface Water JUN 1998 1
Surface Water JUL 1998 5
Surface Water AUG 1998 0
Surface Water SEP 1998 2
Surface Water OCT 1998 3
Surface Water NOV 1998 0
Surface Water DEC 1998 1


Source Water (Untreated) Levels of E. coli for West River Water Treatment Plant

Water Type Month E. coli Level (E.coli/100mL)
Surface Water JUL 1997 2
Surface Water AUG 1997 0
Surface Water SEP 1997 1
Surface Water OCT 1997 1
Surface Water NOV 1997 4
Surface Water DEC 1997 1
Surface Water JAN 1998 1
Surface Water FEB 1998 0
Surface Water MAR 1998 31
Surface Water APR 1998 1
Surface Water MAY 1998 6
Surface Water JUN 1998 0
Surface Water JUL 1998 4
Surface Water AUG 1998 47
Surface Water SEP 1998 2
Surface Water OCT 1998 3
Surface Water NOV 1998 2
Surface Water DEC 1998 2


How does this utility's source water compare to source waters nationally for E. coli? Click on "view report" to see the state and national levels of E. coli.

Month State Report National Report
July 1997 view report view report
Aug 1997 view report view report
Sep 1997 view report view report
Oct 1997 view report view report
Nov 1997 view report view report
Dec 1997 view report view report
Jan 1998 view report view report
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Dec 1998 view report view report


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