Levels of Treated Water Total Trihalomethanes for COLORADO
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 of Aurora, Utilities Dept.
Water Type - SURFACE WATER
(Tr
eated Water)
Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
---|---|---|---|---|
Kuiper Water Treatment Plant | 249 | Surface Water | OCT 1997 - DEC 1997 | 28.9 |
Wemlinger Water Treatment Plant | 250 | Surface Water | OCT 1997 - DEC 1997 | 25 |
City of Boulder, Dept. of Utilities
Water Type - SURFACE WATER
(Treated Water)
Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
---|---|---|---|---|
Betasso Water Treatment Plant | 251 | Surface Water | OCT 1997 - DEC 1997 | 42 |
City of Fort Collins Water Utility
Water Type - SURFACE WATER
(Treated Water)
Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
---|---|---|---|---|
Fort Collins Water Treatment Facility | 259 | Surface Water | OCT 1997 - DEC 1997 | 22.4 |
Colorado Springs Utilities
Water Type - SURFACE WATER
(Treated Water)
Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
---|---|---|---|---|
Mesa Water Treatment Plant | 257 | Surface Water | OCT 1997 - DEC 1997 | 30.7 |
Pine Valley Water Treatment Plant | 256 | Surface Water | OCT 1997 - DEC 1997 | 38.6 |
Denver Water
Water Type - SURFACE WATER
(Treated Water)
Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
---|---|---|---|---|
Foothills WTP | 253 | Surface Water | OCT 1997 - DEC 1997 | 28.9 |
Moffat WTP | 255 | Surface Water | OCT 1997 - DEC 1997 | 24.3 |
Pueblo Board of Water Works
Water Type - SURFACE WATER
(Treated Water)
Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
---|---|---|---|---|
Whitlock Water Treatment Facility | 260 | Surface Water | OCT 1997 - DEC 1997 | 7.1 |