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EF/ ICR Logo Levels of Treated Water Total Trihalomethanes for MISSOURI
JULY - SEPTEMBER 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 Springfield, MO

Water Type - SURFACE WATER
(Trea ted Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Blackman Water Treatment Plant 431 Surface Water JUL 1997 - SEP 1997 44.3



City of Independence Water Department

Water Type - GROUND WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
City of Independence W.T.P. 429 Ground Water JUL 1997 - SEP 1997 6



City of St. Louis Water Division

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Chain of Rocks 433 Surface Water JUL 1997 - SEP 1997 20.8
Howard Bend 434 Surface Water JUL 1997 - SEP 1997 23.2



KANSAS CITY WATER SERVICES

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Kansas City Missouri Water Services 430 Surface Water JUL 1997 - SEP 1997 13



ST. LOUIS COUNTY WATER COMPANY

Water Type - SURFACE WATER
(Treated Water)

Plant Name Plant ID Water Type Quarter Total Trihalomethanes Concentration (ppb)
Meramec Plant 437 Surface Water JUL 1997 - SEP 1997 50.6
North County Plant 436 Surface Water JUL 1997 - SEP 1997 5.7
South County Plant 438 Surface Water JUL 1997 - SEP 1997 59.4



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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