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Levels of Treated Water Total Trihalomethanes for MICHIGAN
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. |
Ann Arbor Water Treatment Plant
City of Detroit Water and Sewerage Dept
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Northeast WTP | 415 | Surface Water | JUL 1997 - SEP 1997 | 21.8 |
| Southwest WTP | 416 | Surface Water | JUL 1997 - SEP 1997 | 27.5 |
| Springwells WTP | 413 | Surface Water | JUL 1997 - SEP 1997 | 24.1 |
| Water Works Park WTP | 414 | Surface Water | JUL 1997 - SEP 1997 | 21.7 |
City of Grand Rapids Water System
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Lake Michigan Filtration Plant | 418 | Surface Water | JUL 1997 - SEP 1997 | 31.4 |
Kalamazoo Department of Public Services
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Groundwater Treatment | 419 | Ground Water | JUL 1997 - SEP 1997 | 9.8 |
| Station 1 VOC Removal, Iron Removal | 420 | Ground Water | JUL 1997 - SEP 1997 | 22.1 |
Lansing Board of Water and Light
SAGINAW WATER TREATMENT PLANT
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Saginaw Water Treatment Plant | 423 | Surface Water | JUL 1997 - SEP 1997 | 67.7 |
Wyoming Utilities Department
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Donald K. Shine WTP | 424 | Surface Water | JUL 1997 - SEP 1997 | 27.7 |
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