Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA1910033
PWS Name	CALIFORNIA WATER SERVICE CO. - DOMINGUEZ
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	143996
County Served	Los Angeles

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9607007	Returned to Compliance	01-APR-2018	30-JUN-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	9607006	Returned to Compliance	01-APR-2018	30-JUN-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	9607004	Returned to Compliance	01-JAN-2018	31-MAR-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9607005	Returned to Compliance	01-JAN-2018	31-MAR-2018	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	216005	Returned to Compliance	01-NOV-2001	30-NOV-2001	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9607003	Returned to Compliance	01-OCT-1995	31-OCT-1995	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9307001	Returned to Compliance	01-SEP-1993	30-SEP-1993	No

1 - 7 of 7

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9616012	9607004	SOX	State Compliance achieved	10-JAN-2020	State	-
9616012	9607006	SOX	State Compliance achieved	10-JAN-2020	State	-
9616012	9607005	SOX	State Compliance achieved	10-JAN-2020	State	-
9616012	9607007	SOX	State Compliance achieved	10-JAN-2020	State	-
216029	216005	SOX	State Compliance achieved	07-MAR-2002	State	ENF_NO:04-16-02C-001; CITATION FOR PROCEDURAL FAILURE (MISSED 1 ON 11/01)
9616010	9607003	SOX	State Compliance achieved	20-DEC-1995	State	ENF_NO:04-07-95C-073; TCR MCL CIT.WITH 1 PROVISION TCR MCL FAILURE - OCTOBER 1995
1022058	9307001	SOX	State Compliance achieved	30-SEP-1993	State	NOTICE OF VIOLATION TCR

1 - 7 of 7

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
MWD CONN. WB-10 LONG BEACH LATERAL-TRTD	28129	Yes	Consecutive Connection	Surface water	Permanent	Active
WELL 300-01	68174	Yes	Well	Ground water	Permanent	Active
WELL 216-02	65864	Yes	Well	Ground water	Permanent	Active
WELL 294-01	24297	Yes	Well	Ground water	Permanent	Active
WELL 277-01	11629	Yes	Well	Ground water	Permanent	Active
WELL 279-01	11628	Yes	Well	Ground water	Permanent	Active
WELL 275-01	11626	Yes	Well	Ground water	Permanent	Active
WELL 290-01	11625	Yes	Well	Ground water	Permanent	Active
WELL 272-01	11617	Yes	Well	Ground water	Permanent	Active
WELL 298-01	11579	Yes	Well	Ground water	Permanent	Active
WELL 297-01	11578	Yes	Well	Ground water	Permanent	Active
WELL 215-01	11576	Yes	Well	Ground water	Permanent	Active
WELL 215-02 - ABANDONED	7753	Yes	Well	Ground water	Other	Inactive
WELL 23-01 - ABANDONED	7751	Yes	Well	Ground water	Other	Inactive
WELL 219-02 - INACTIVE	24343	Yes	Well	Ground water	Other	Inactive
WELL 203-01 - DESTROYED	23897	Yes	Well	Ground water	Other	Inactive
WELL 24-01 - INACTIVE	20787	Yes	Well	Ground water	Other	Inactive
WELL 19-01 - INACTIVE	20752	Yes	Well	Ground water	Other	Inactive
WELL 232-02 - DESTROYED	18512	Yes	Well	Ground water	Other	Inactive
RO PLANT INF, WELL 232-01 & 232-02 DESTD	18399	Yes	Well	Ground water	Other	Inactive
WELL 202 - DESTROYED	18350	Yes	Well	Ground water	Other	Inactive
WELL 201 - DESTROYED	18348	Yes	Well	Ground water	Other	Inactive
WELL 206 - DESTROYED	18341	Yes	Well	Ground water	Other	Inactive
WELL 26-01 - DESTROYED	18328	Yes	Well	Ground water	Other	Inactive
WELL 232-01 - DESTROYED	18326	Yes	Well	Ground water	Other	Inactive
WELL 31-01 - DESTROYED	18319	Yes	Well	Ground water	Other	Inactive
WELL 19 - DESTROYED	18313	Yes	Well	Ground water	Other	Inactive
WELL 23A - DESTROYED	18311	Yes	Well	Ground water	Other	Inactive
WELL 22 - DESTROYED	18310	Yes	Well	Ground water	Other	Inactive
WELL 232-03 - INACTIVE	11577	Yes	Well	Ground water	Other	Inactive
WELL 231-01 INACTIVE	20794	Yes	Well	Ground water	Interim	Inactive
WELL 72-01 - INACTIVE	20793	Yes	Well	Ground water	Interim	Inactive
WELL 75-01 - INACTIVE	20779	Yes	Well	Ground water	Interim	Inactive
MWD CONN. WB-14 - MIDDLE FEEDER/TREATED	28130	Yes	Consecutive Connection	Surface water	Permanent	Active
MWD CONN. WB-19 - TREATED	28131	Yes	Consecutive Connection	Surface water	Permanent	Active
MWD CONN. WB-21-PALOS VERDES FDR/TREATED	28132	Yes	Consecutive Connection	Surface water	Permanent	Active
MWD CONN. WB-35 - VICTORIA ST.LATERAL	28133	Yes	Consecutive Connection	Surface water	Permanent	Active
MWD CONN. WB-36-PALOS VERDES FDR/TREATED	28134	Yes	Consecutive Connection	Surface water	Permanent	Active
MWD CONN. WB-39 TORRANCE LATERAL-TREATED	28135	Yes	Consecutive Connection	Surface water	Permanent	Active
MWD CONN. WB-9 - LONG BEACH LATERAL-TRTD	28136	Yes	Consecutive Connection	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	28128	No	Distribution System/Zone	-	-	Active
STATION 203 TANK 1	70762	No	Storage	-	-	Active
STATION 203 TANK 2	70763	No	Storage	-	-	Active
STATION 203 TANK 3	70764	No	Storage	-	-	Active
STATION 203 TANK 4	70765	No	Storage	-	-	Active
STATION 215 TANK 1	70766	No	Storage	-	-	Active
STATION 232 TANK 1	70767	No	Storage	-	-	Active
STATION 275 TANK 1	70768	No	Storage	-	-	Active
STATION 277 TANK 1	70769	No	Storage	-	-	Active
STATION 279 TANK 1	70770	No	Storage	-	-	Active

1 - 50 of 82

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL 215-02 - CL2 AND NH3 TREATMENT	5214	Chloramines	Disinfection
WELL 219-02 - CL2 AND NH3 TREATMENT XCLD	5227	Chloramines	Disinfection
WELL 272-01 - CL2 AND NH3 TREATMENT	5251	Chloramines	Disinfection
WELL 275-01 - CL2 AND NH3 TREATMENT-INAC	5252	Chloramines	Disinfection
WELL 277-01 - CL2 AND NH3 TREATMENT XCLD	5253	Chloramines	Disinfection
WELL 279-01 - CL2 AND NH3 TREATMENT	5254	Chloramines	Disinfection
WELL 294-01 - CL2 AND NH3 TREATMENT XCLD	5255	Hypochlorination, Post	Disinfection
WELL 290-01 - CL2 AND NH3 TREATMENT	5256	Chloramines	Disinfection
WELL 297-01 - STATION 297 PLANT EFFLUENT	5257	Chloramines	Disinfection
OXIDATION EFF W298-01	5258	Chloramines	Disinfection
AERATION EFF W298-01	5259	Aeration, Diffused	Taste / odor control
OXIDATION EFF W279-01	5273	Hypochlorination, Pre	Taste / odor control
OXIDATION EFF W275-01 - INACTIVE	53289	Hypochlorination, Pre	Taste / odor control
CLEARWELL TANK	53290	Hypochlorination, Pre	Taste / odor control
OXIDATION EFF W277-01	53297	Hypochlorination, Pre	Taste / odor control
WELL 298-01 - CL2 AND NH3 TREATMENT XCLD	57877	Chloramines	Disinfection
WELL 294-01 WTP AERATION EFF	58334	Aeration, Diffused	Organics removal
WELL 294-01 WTP EFF BEFORE CL2 AND NH3	58335	Ion Exchange	Inorganics removal
WELL 275-01 - COMBINED AERATION EFFL	58336	Aeration, Spray	Organics removal
WELL 275-01 - COMBINED IX PLANT EFFL	58724	Ion Exchange	Organics removal
RO PLANT EFF (W232-03TDS REDU/BE4 BLEND)	5883	Reverse Osmosis	Softening (hardness removal)
RO PLANT EFF (W232-03TDS REDU/BE4 BLEND)	5883	Reverse Osmosis	Manganese removal
RO PLANT EFF (W232-03TDS REDU/BE4 BLEND)	5883	Reverse Osmosis	Iron removal
RO EFF W232-03 (POST BLEND & CL2)	5915	Chloramines	Disinfection
WELL 294-01 WTP EFF POST CL2 AND NH3	63209	Chloramines	Disinfection
WELL 300-01 - FILTER EFFLUENT	75072	Filtration, Greensand	Inorganics removal
W275-01 - CHLORAMINATION	75173	Chloramines	Disinfection
STATION 275 PLANT EFFLUENT	75174	Aeration, Spray	Organics removal
STATION 275 PLANT EFFLUENT	75174	Aeration, Spray	Taste / odor control

1 - 29 of 29

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Nav Menu

Your Drinking Water Query results from SDWIS Fed Reporting Services

Note

PWS Violation

Violations

Column Actions

Enforcement Actions

Enforcement Actions

Column Actions

PWS Facilities

All Facilities

Column Actions

PWS Treatment Processes

Treatment Processes

Column Actions