Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA1910053
PWS Name	HEMLOCK MUTUAL WATER CO.
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	686
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
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	9707009	Open	17-OCT-2024	-	Yes
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	9707010	Open	17-OCT-2024	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	9707008	Returned to Compliance	01-JUL-2024	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	9707007	Returned to Compliance	01-JAN-2024	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	9707006	Returned to Compliance	01-OCT-2023	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	9707005	Returned to Compliance	01-JUL-2023	-	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9707003	Returned to Compliance	01-NOV-2012	30-NOV-2012	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	9707004	Returned to Compliance	01-OCT-2012	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1322032	Returned to Compliance	01-OCT-2012	31-OCT-2012	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1022031	Returned to Compliance	01-JUN-2010	30-JUN-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1022030	Returned to Compliance	01-OCT-2009	31-DEC-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	922029	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	922028	Returned to Compliance	01-APR-2009	30-JUN-2009	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	922006	Returned to Compliance	30-JAN-2009	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	922027	Returned to Compliance	01-JAN-2009	31-MAR-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	922026	Returned to Compliance	01-OCT-2008	31-DEC-2008	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	922005	Returned to Compliance	01-OCT-2008	31-OCT-2008	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	822025	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	822024	Returned to Compliance	01-APR-2008	30-JUN-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	822023	Returned to Compliance	01-JAN-2008	31-MAR-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	822022	Returned to Compliance	01-OCT-2007	31-DEC-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	722021	Returned to Compliance	01-JUL-2007	30-SEP-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	722020	Returned to Compliance	01-APR-2007	30-JUN-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	722019	Returned to Compliance	01-JAN-2007	31-MAR-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	722018	Returned to Compliance	01-OCT-2006	31-DEC-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	622017	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	622016	Returned to Compliance	01-APR-2006	30-JUN-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	622015	Returned to Compliance	01-JAN-2006	31-MAR-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	622014	Returned to Compliance	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	522013	Returned to Compliance	01-JUL-2005	30-SEP-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	522012	Returned to Compliance	01-APR-2005	30-JUN-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	522011	Returned to Compliance	01-JAN-2005	31-MAR-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	522010	Returned to Compliance	01-OCT-2004	31-DEC-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	422009	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	422008	Returned to Compliance	01-APR-2004	30-JUN-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	422007	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9707002	Returned to Compliance	01-OCT-1996	31-OCT-1996	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	9407003	Returned to Compliance	01-JUN-1994	-	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	95V0001	Returned to Compliance	01-JUL-1993	01-MAR-2000	No

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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
9707025	9707007	SOX	State Compliance achieved	08-AUG-2025	State	-
9707025	9707008	SOX	State Compliance achieved	08-AUG-2025	State	-
9707025	9707006	SOX	State Compliance achieved	08-AUG-2025	State	-
9707025	9707005	SOX	State Compliance achieved	08-AUG-2025	State	-
9707019	9707003	SFO	State Administrative/Compliance Order with penalty issued	15-JAN-2013	State	-
9707020	9707004	SOX	State Compliance achieved	10-DEC-2012	State	-
9707022	1322032	SOX	State Compliance achieved	30-NOV-2012	State	This TCR violation has been closed with this SOX enforcement record due to rTCR implementation on 4/1/2016.
1122047	1022031	SOX	State Compliance achieved	30-JUL-2010	State	ENF_NO:04-22-10C-016; RETURN TO COMPLIANCE, PN ISSUE D
1122052	922005	SOX	State Compliance achieved	30-JUL-2010	State	ENF_NO:CIT04-22-08C038; FAIL MEET PRIMARY DRINKING WAT ER FOR BACTI MCL VIOLATION
1122050	522011	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	522012	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	522013	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	622014	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	622015	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	622016	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	622017	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	722018	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	722019	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	722020	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	722021	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	822022	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	822023	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	822024	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	822025	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	922026	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	922027	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	922028	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	922029	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	1022030	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122051	922006	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:01302009; PB AND CU MONITORING VIOLATION PN ISSUED IN CCR JULY 2010
1122050	522010	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	422009	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122051	9407003	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:01302009; PB AND CU MONITORING VIOLATION PN ISSUED IN CCR JULY 2010
1122050	422007	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
1122050	422008	SOX	State Compliance achieved	01-JUL-2010	State	ENF_NO:11022009; FAIL TO SUBMIT QUARTERLY CHLOR INE REPORT FOR STAGE 1 DDBP
00E0001	95V0001	EOX	Federal Compliance achieved	01-MAR-2000	ODSWeb	-
9707017	9707002	SOX	State Compliance achieved	11-FEB-1997	State	ENF_NO:04-07-97C-008; COMPANY COMPLIED WITH PROVISIO TCR MCL FAILURE IN OCTOBER 1996

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
NORTH WELL	11623	Yes	Well	Ground water	Permanent	Active
SOUTH WELL	11624	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	28202	No	Distribution System/Zone	-	-	Active
NORTH WELL - CHLORINATION	58675	No	Treatment Plant	-	-	Active
SOUTH WELL - CHLORINATION	58676	No	Treatment Plant	-	-	Active
TREATMENT PLANT-SOUTH FILTER - INACTIVE	4954	No	Treatment Plant	-	-	Inactive
COMB. SOUTH & NORTH WELLS - CHLORINATION	6033	No	Treatment Plant	-	-	Inactive
TREATMENT PLANT-SOUTH FILTER-INACTIVE	CA1910053005	No	Treatment Plant	-	-	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
NORTH WELL - CHLORINATION	58675	Hypochlorination, Post	Disinfection
SOUTH WELL - CHLORINATION	58676	Hypochlorination, Post	Disinfection
COMB. SOUTH & NORTH WELLS - CHLORINATION	6033	Hypochlorination, Post	Disinfection

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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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