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EF/ ICR Logo Levels of Treated Water Total Trihalomethanes for INDIANA
OCTOBER - DECEMBER 1997


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 individual health risks.

Units: Sample measurements are taken in micrograms per Liter (ug/L) and are regulated in milligrams per Liter (mg/L). A microgram per Liter is equivalent to one contaminant part per billion (ppb). A ppb can be thought of as one grain of salt in a swimming pool. Data for Total Trihalomethanes, haloacetic acids 5, and bromate are presented in ppb. 1 mg/L = 1000 ug/L, or 0.080 mg/L = 80 ug/L = 80 ppb, which happens to be the TTHM standard in the Stage 1 DBP Rule.

Calculation in Regulations is Different: Comparisons with compliance calculations based on the existing Total Trihalomethanes standard in CFR Part 141.30 may not be warranted since the standard i s based on an annual average of public water system quarterly averages and not on treatment plant results as shown here. Also the results here are based on different types of samples.

Results of Zero: A result of zero may indicate that a sample was analyzed, but that the result was less than the lowest value that the analytical method can reliably report.




City Utilities of Fort Wayne

Water Type - SURFACE WATER
(Tre ated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Three Rivers Filtration Plant 368 Surface Water OCT 1997 - DEC 1997 4



EVANSVILLE WATER & SEWER UTILITY

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
EVANSVILLE WATER TREATMENT PLANT 379 Surface Water OCT 1997 - DEC 1997 105.1



Hammond Water Filtration Plant

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
HAMMOND WATER FILTRATION PLANT 755 Surface Water OCT 1997 - DEC 1997 11.8



Indianapolis Water Company

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Fall Creek 372 Surface Water OCT 1997 - DEC 1997 24.2
T.W. Moses 374 Surface Water OCT 1997 - DEC 1997 44
White River 371 Surface Water OCT 1997 - DEC 1997 38
White River North 373 Surface Water OCT 1997 - DEC 1997 50.3



Northwest Indiana Water Company

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Borman Park 369 Surface Water OCT 1997 - DEC 1997 9.1
Ogden Dunes 370 Surface Water OCT 1997 - DEC 1997 11.4



South Bend Water Works

Water Type - GROUND WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Edison 377 Ground Water OCT 1997 - DEC 1997 4.5
South 378 Ground Water OCT 1997 - DEC 1997 13.5



Results for mixed water (ground water and surface water) and purchased water can be found under water system summary reports.


How does this state's treated water compare to treated waters nationally for Total Trihalomethanes?
View national data for the same month.


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