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EF/ ICR Logo Levels of Treated Water Total Trihalomethanes for SOUTH CAROLINA
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.




Charleston Commissioners of Public Wks

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Hanahan Water Treatment Plant 597 Surface Water OCT 1997 - DEC 1997 40.8



City Of Columbia

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Columbia Canal 601 Surface Water OCT 1997 - DEC 1997 34.8
LAKE MURRAY WATER PLANT 602 Surface Water OCT 1997 - DEC 1997 22.2



DUKE POWER COMPANY

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
LAKE HARTWELL FILTER PLANT 596 Surface Water OCT 1997 - DEC 1997 24.6



Greenville Water System

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Keowee(Adkins) WTP 599 Surface Water OCT 1997 - DEC 1997 6.5
North Saluda Plant 598 Surface Water OCT 1997 - DEC 1997 11.4
Table Rock Treatment Plant 600 Surface Water OCT 1997 - DEC 1997 11.1



Spartanburg Water System

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
R. B. Simms Filtration Plant 603 Surface Water OCT 1997 - DEC 1997 36.6



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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