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EF/ ICR Logo Levels of Treated Water Total Trihalomethanes for INDIANA
JANUARY - MARCH 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 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
(Treate d Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Three Rivers Filtration Plant 368 Surface Water JAN 1998 - MAR 1998 1.2



EVANSVILLE WATER & SEWER UTILITY

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total T rihalomethanes Concentration (ppb)
EVANSVILLE WATER TREATMENT PLANT 379 Surface Water JAN 1998 - MAR 1998 64



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 JAN 1998 - MAR 1998 12.2



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 JAN 1998 - MAR 1998 31.2
T.W. Moses 374 Surface Water JAN 1998 - MAR 1998 43.4
White River 371 Surface Water JAN 1998 - MAR 1998 37.8
White River North 373 Surface Water JAN 1998 - MAR 1998 37.8



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 JAN 1998 - MAR 1998 10.3
Ogden Dunes 370 Surface Water JAN 1998 - MAR 1998 13.3



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 JAN 1998 - MAR 1998 5.9
South 378 Ground Water JAN 1998 - MAR 1998 11.7



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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