Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA1910070
PWS Name	LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	208129
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, Regular	Arsenic Rule	Arsenic	716004	Returned to Compliance	01-SEP-2007	30-SEP-2007	No
MR	Monitoring, Check/Repeat/Confirmation	Nitrate Rule	Nitrite	316003	Returned to Compliance	01-FEB-2003	28-FEB-2003	No
MR	Monitoring, Check/Repeat/Confirmation	Nitrate Rule	Nitrate	316002	Returned to Compliance	01-FEB-2003	28-FEB-2003	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9315001	Returned to Compliance	01-DEC-1992	31-DEC-1992	Yes

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
816045	716004	SOX	State Compliance achieved	15-OCT-2007	State	ENF_NO:NOV AS 10152007; NOV OF ARSENIC MCL EXCEEDENCE
816043	316002	SOX	State Compliance achieved	03-APR-2003	State	ENF_NO:NOV 4/3/2003; REC'D 4/24/03 LETTER FROM WS TO COMPLY W/NOV DIRECTIVES
816043	316003	SOX	State Compliance achieved	03-APR-2003	State	ENF_NO:NOV 4/3/2003; REC'D 4/24/03 LETTER FROM WS TO COMPLY W/NOV DIRECTIVES
9816008	9315001	SOX	State Compliance achieved	15-APR-1993	State	#04-101 BACTI MCL-DEC. 1992

1 - 4 of 4

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
SNIP - AVEK CC	72595	Yes	Consecutive Connection	Surface water	Emergency	Active
WELL 04-26	24236	Yes	Well	Ground water	Permanent	Inactive
WELL 04-41	8885	Yes	Well	Ground water	Permanent	Active
WELL 04-38	8883	Yes	Well	Ground water	Permanent	Active
WELL 04-36	8881	Yes	Well	Ground water	Permanent	Active
WELL 04-43	8880	Yes	Well	Ground water	Permanent	Active
WELL 04-32	8877	Yes	Well	Ground water	Permanent	Active
WELL 04-30	8876	Yes	Well	Ground water	Permanent	Active
WELL 04-44	8872	Yes	Well	Ground water	Permanent	Active
WELL 04-51	8869	Yes	Well	Ground water	Permanent	Active
WELL 04-55	8867	Yes	Well	Ground water	Permanent	Active
WELL 04-59	8865	Yes	Well	Ground water	Permanent	Active
WELL 04-27	8812	Yes	Well	Ground water	Permanent	Active
WELL 04-29	8778	Yes	Well	Ground water	Permanent	Active
WELL 34-7	8719	Yes	Well	Ground water	Permanent	Active
WELL 04-15 - ACTIVE	8712	Yes	Well	Ground water	Permanent	Active
WELL 04-25	8704	Yes	Well	Ground water	Permanent	Active
WELL 04-65	8699	Yes	Well	Ground water	Permanent	Active
WELL 04-68	8698	Yes	Well	Ground water	Permanent	Active
WELL 04-67	8697	Yes	Well	Ground water	Permanent	Active
WELL 04-62	8696	Yes	Well	Ground water	Permanent	Active
WELL 04-61	8694	Yes	Well	Ground water	Permanent	Active
WELL 04-60	8686	Yes	Well	Ground water	Permanent	Active
WELL 04-64	8684	Yes	Well	Ground water	Permanent	Active
WELL 04-72	8680	Yes	Well	Ground water	Permanent	Active
WELL 04-82	8679	Yes	Well	Ground water	Permanent	Active
WELL 04-83	8678	Yes	Well	Ground water	Permanent	Active
WELL 04-87	8674	Yes	Well	Ground water	Permanent	Active
WELL 04-66	8671	Yes	Well	Ground water	Permanent	Active
WELL 04-70	23888	Yes	Well	Ground water	Permanent	Active
WELL 04-71	23887	Yes	Well	Ground water	Permanent	Active
WELL 04-84	23884	Yes	Well	Ground water	Permanent	Active
WELL 04-74	23882	Yes	Well	Ground water	Permanent	Active
WELL 04-76	23880	Yes	Well	Ground water	Permanent	Active
WELL 04-77	23874	Yes	Well	Ground water	Permanent	Active
WELL 04-80	23853	Yes	Well	Ground water	Permanent	Active
WELL 04-73	23831	Yes	Well	Ground water	Permanent	Active
WELL 04-90	23829	Yes	Well	Ground water	Permanent	Active
WELL 04-90 - PENDING	CA1910070100	Yes	Well	Ground water	Other	Inactive
WELL 04-89 - PENDING	CA1910070099	Yes	Well	Ground water	Other	Inactive
WELL 04-88 - PENDING	CA1910070098	Yes	Well	Ground water	Other	Inactive
WELL 04-79 - PENDING	CA1910070097	Yes	Well	Ground water	Other	Inactive
WELL 04-78 - PENDING	CA1910070096	Yes	Well	Ground water	Other	Inactive
WELL 04-81 - PENDING	CA1910070092	Yes	Well	Ground water	Other	Inactive
WELL 04-80 - PENDING	CA1910070091	Yes	Well	Ground water	Other	Inactive
WELL 04-74 - PENDING	CA1910070090	Yes	Well	Ground water	Other	Inactive
WELL 04-73 - PENDING	CA1910070089	Yes	Well	Ground water	Other	Inactive
WELL XXX - PENDING	CA1910070059	Yes	Well	Ground water	Other	Inactive
WELL 04-86 - PENDING	CA1910070057	Yes	Well	Ground water	Other	Inactive
WELL 04-85 - PENDING	CA1910070056	Yes	Well	Ground water	Other	Inactive

1 - 50 of 131

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL 04-60 - CL2	3164	Gaseous Chlorination, Post	Disinfection
WELL 04-36 - CL2	3165	Hypochlorination, Post	Disinfection
WELL 04-41 - CL2	3166	Hypochlorination, Post	Disinfection
WELL 34-6 - CL2	3167	Gaseous Chlorination, Post	Disinfection
WELL 04-22, 04-27 CL2	40931	Hypochlorination, Pre	Disinfection
WELL 04-37 CL2	40932	Hypochlorination, Pre	Disinfection
WELLS 4-29, 4-30, 4-66 & 4-69 BLENDING 1	57027	Rapid Mix	Inorganics removal
WELLS 4-63, 4-64, 4-82, 4-83 & AVEK	57028	Rapid Mix	Inorganics removal
WELLS 4-29, 4-30, 4-66 & 4-69 BLENDING 2	57031	Rapid Mix	Inorganics removal
WELLS 4-29, 4-30, 4-66 & 4-69 BLENDING 3	57032	Rapid Mix	Inorganics removal
AVE. J ARSENIC BLENDING TANK	57036	Rapid Mix	Inorganics removal
RESERVOIR-LANDMARK EFF (ARSENIC BLEND)	6086	Rapid Mix	Inorganics removal
WELLS 04-50 & 04-51 - CL2	6108	Gaseous Chlorination, Post	Disinfection
WELLS 04-26 & 04-62 - CL2 XCLD	6111	Gaseous Chlorination, Post	Disinfection
WELLS 04-12, 25, 38, & 61 - CL2 XCLD	6114	Gaseous Chlorination, Post	Disinfection
WELLS 04-13, 04-33 - CL2 XCLD	6115	Gaseous Chlorination, Post	Disinfection
WELLS 04-15, 52, & 67 - CL2 XCLD	6116	Gaseous Chlorination, Post	Disinfection
WELLS 04-29, 30, 66 & 69 - CL2 XCLD	6117	Gaseous Chlorination, Post	Disinfection
WELLS 04-54 & 04-55 - CL2	6122	Gaseous Chlorination, Post	Disinfection
WELLS 04-58 & 04-59 - CL2	6123	Gaseous Chlorination, Post	Disinfection
FOREBAY H8-DIV ENF (ARSENIC BLENDING)	6125	Rapid Mix	Inorganics removal
WELL 04-39, 4-FOX, 4-65 - CL2 XCLD	6127	Hypochlorination, Post	Disinfection
FOREBAY-K8-5W EFF (ARSENIC BLEND)	6130	Rapid Mix	Inorganics removal
WELLS 04-32, 34, 43, 44, 72 - CL2 XCLD	6131	Gaseous Chlorination, Post	Disinfection
FOREBY J-TREVOR ENF (ARSENIC BLENDING)	6153	Rapid Mix	Inorganics removal
ARSENIC BLENDING	61760	Rapid Mix	Inorganics removal
WELL 04-76 & 04-77 - CL2	68229	Gaseous Chlorination, Pre	Disinfection
WELLS 4-73, 4-74, 4-80 & 4-81 - ARS BLND	68267	Rapid Mix	Inorganics removal

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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.

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