![[logo] US EPA](../gif/logo_epaseal.gif){kind=logo}
Levels of Treated Water Total Trihalomethanes for CALIFORNIA
JULY - SEPTEMBER 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. |
Alameda County Water District
Water Type - GROUND WATER
(Tre
ated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Blending Facility | 135 | Ground Water | JUL 1998 - SEP 1998 | 16.7 |
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Mission San Jose WTP | 137 | Surface Water | JUL 1998 - SEP 1998 | 53.2 |
| WTP2 | 136 | Surface Water | JUL 1998 - SEP 1998 | 17.1 |
CITY OF LOS ANGELES
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Los Angeles Aqueduct Filtration Plant | 163 | Surface Water | JUL 1998 - SEP 1998 | 27 |
| Lower Stone Canyon Reservoir | 166 | Surface Water | JUL 1998 - SEP 1998 | 64.2 |
| River Supply Conduit | 738 | Surface Water | JUL 1998 - SEP 1998 | 33.3 |
| Upper Hollywood Reservoir | 739 | Surface Water | JUL 1998 - SEP 1998 | 62.4 |
CITY OF SANTA BARBARA
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| W.B. CATER WTP | 231 | Surface Water | JUL 1998 - SEP 1998 | 69.8 |
CITY OF VALLEJO
California Domestic Water Company
California Water Service Co, Bakersfield
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Groundwater Trmt - Well #7-07 | 150 | Ground Water | JUL 1998 - SEP 1998 | 0 |
California-American Water Company
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Begonia Iron Removal Plant | 182 | Ground Water | JUL 1998 - SEP 1998 | 29.1 |
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Carmel Valley Filter Plant | 183 | Surface Water | JUL 1998 - SEP 1998 | 60.3 |
Castaic Lake Water Agency
City of Anaheim
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Linda Vista Reservoir | 186 | Ground Water | JUL 1998 - SEP 1998 | 33.2 |
City of Escondido
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentr ation (ppb) |
|---|---|---|---|---|
| Escondido - Vista WTP | 215 | Surface Water | JUL 1998 - SEP 1998 | 79.7 |
City of Fresno, Water Division
City of Fullerton
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Main Water Plant | 187 | Ground Water | JUL 1998 - SEP 1998 | 1.6 |
City of Huntington Beach - Public Works
City of Modesto
Water Ty
pe - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| City of Modesto, Groundwater Treatment | 243 | Ground Water | JUL 1998 - SEP 1998 | 0 |
City of Oceanside
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Mission Basin Desalting Facility | 753 | Ground Water | JUL 1998 - SEP 1998 | 35.2 |
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Robert A. Weese Filtration Plant | 217 | Surface Water | JUL 1998 - SEP 1998 | 42.3 |
City of Riverside
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Grand Terrace | 201 | Ground Water | JUL 1998 - SEP 1998 | 3.5 |
City of Sacramento
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Groundwater Treatment Plant | 742 | Ground Water | JUL 1998 - SEP 1998 | 0 |
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| E.A. Fairbairn Water Treatment Plant | 205 | Surface Water | JUL 1998 - SEP 1998 | 43.2 |
| Sacramento River Water Treatment Plant | 204 | Surface Water | JUL 1998 - SEP 1998 | 41.8 |
City of San Diego Water Utilities
City of Santa Ana
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Groundwater Treatment | 189 | Ground Water | JUL 1998 - SEP 1998 | 1.2 |
Coachella VWD: Cove
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Groundwater Treatment | 196 | Ground Water | JUL 1998 - SEP 1998 | 0 |
Contra Costa Water Dis trict
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Bollman Water Treatment Plant | 146 | Surface Water | JUL 1998 - SEP 1998 | 18.4 |
Cucamonga County Water District
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Reservoir 1 (Chino Basin) | 743 | Ground Water | JUL 1998 - SEP 1998 | 5.3 |
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Lloyd W. Michael WTP | 208 | Surface Water | JUL 1998 - SEP 1998 | 46.6 |
| Royer/Nesbit WTP | 209 | Surface Water | JUL 1998 - SEP 1998 | 5.2 |
Dominguez Water Corp.
EAST BAY MUNICIPAL UTILITY DISTRICT
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Layfayette Filter Plant | 143 | Surface Water | JUL 1998 - SEP 1998 | 44.1 |
| Orinda Filter Plant | 138 | Surface Water | JUL 1998 - SEP 1998 | 43.6 |
| Sobrante Filter Plant | 141 | Surface Water | JUL 1998 - SEP 1998 | 68.1 |
| Upper San Leandro Filter Plant | 139 | Surface Water | JUL 1998 - SEP 1998 | 137.7 |
| Walnut Creek Filter Plant | 140 | Surface Water | JUL 1998 - SEP 1998 | 45.2 |
Helix Water District
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| R. M. Levy | 216 | Surface Water | JUL 1998 - SEP 1998 | 61 |
LONG BEACH WATER DEPARTMENT
Marin Municipal Water District
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Bon Tempe Treatment Plant | 181 | Surface Water | JUL 1998 - SEP 1998 | 31 |
| San Geronimo Water Treatment Plant | 180 | Surface Water | JUL 1998 - SEP 1998 | 30.2 |
Metro Water Dist of So Calif
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| F. E. Weymouth FP | 171 | Surface Water | JUL 1998 - SEP 1998 | 49.4 |
| J. Jensen FP | 168 | Surface Water | JUL 1998 - SEP 1998 | 49.7 |
| R. A. Skinner FP | 170 | Surface Water | JUL 1998 - SEP 1998 | 50.1 |
| R. B. Diemer FP | 169 | Surface Water | JUL 1998 - SEP 1998 | 45.8 |
North Bay Regional Water Treatment Plant
Ontario-City of
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Well No. 34 | 211 | Ground Water | JUL 1998 - SEP 1998 | 0 |
SONOMA COUNTY WATER AGENCY
San Bernardino Municipal Water Dept.
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Newmark Pumping Plant | 212 | Ground Water | JUL 1998 - SEP 1998 | 1.4 |
San Francisco Water Department
Water
Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Harry Tracy Water Treatment Plant | 226 | Surface Water | JUL 1998 - SEP 1998 | 70.2 |
San Gabriel Valley WC - Fontana
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Sandhill Treatment Plant | 214 | Surface Water | JUL 1998 - SEP 1998 | .3 |
San Gabriel Valley Water Company
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Various Wells Main San Gabriel Basin | 153 | Ground Water | JUL 1998 - SEP 1998 | 0 |
San Jose Water Company
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Well Fields | 234 | Ground Water | JUL 1998 - SEP 1998 | .8 |
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Montevina WTP | 232 | Surface Water | JUL 1998 - SEP 1998 | 30.9 |
San Juan Water District
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Sidney N. Peterson WTP | 206 | Surface Water | JUL 1998 - SEP 1998 | 34.8 |
Santa Clara Valley Water District
Stockton East Water District
Sweetwater Authority
Water Type - SURFACE WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Robert A. Perdue Water Treatment Plant | 221 | Surface Water | JUL 1998 - SEP 1998 | 122.8 |
The City of Garden Grove
Water Type - GROUND WATER
(Treated Water)
| Plant Name | Plant ID | Water Type | Quarter | Total Trihalomethanes Concentration (ppb) |
|---|---|---|---|---|
| Lampson Reservoir | 194 | Ground Water | JUL 1998 - SEP 1998 | 2.5 |
Three Valleys Municipal Water District
Water Facilities Authority
Zone 7 Water Agency
ICR Overview
Envirofacts Home Page