Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA2410002
PWS Name	CITY OF DOS PALOS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	7452
County Served	Merced

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
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811054	Known	01-JUL-2025	30-SEP-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811053	Known	01-APR-2025	30-JUN-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811052	Known	01-JAN-2025	31-MAR-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811051	Known	01-OCT-2024	31-DEC-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811049	Known	01-APR-2024	30-JUN-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811048	Known	01-APR-2023	30-JUN-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811047	Known	01-JAN-2023	31-MAR-2023	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	811044	Open	01-OCT-2022	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811045	Known	01-OCT-2022	31-DEC-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811039	Known	01-JUL-2021	30-SEP-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811038	Known	01-APR-2021	30-JUN-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811036	Known	01-JAN-2021	31-MAR-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	811037	Known	01-JAN-2021	31-MAR-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811032	Known	01-OCT-2020	31-DEC-2020	Yes
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	811035	Known	01-OCT-2020	31-DEC-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811030	Known	01-JUL-2020	30-SEP-2020	Yes
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	811034	Known	01-JUL-2020	30-SEP-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811028	Known	01-APR-2020	30-JUN-2020	Yes
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	811033	Known	01-APR-2020	30-JUN-2020	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811027	Known	01-OCT-2019	31-DEC-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811026	Known	01-APR-2019	30-JUN-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811025	Known	01-JAN-2019	31-MAR-2019	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811024	Known	01-OCT-2018	31-DEC-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811023	Known	01-JUL-2018	30-SEP-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811021	Known	01-APR-2017	30-JUN-2017	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	811022	Returned to Compliance	01-JAN-2017	31-JAN-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811020	Known	01-JAN-2017	31-MAR-2017	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811019	Known	01-OCT-2016	31-DEC-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811018	Known	01-JUL-2016	30-SEP-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811017	Known	01-APR-2016	30-JUN-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811016	Known	01-JAN-2016	31-MAR-2016	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811015	Known	01-OCT-2015	31-DEC-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811014	Known	01-JUL-2015	30-SEP-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811013	Known	01-APR-2015	30-JUN-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811012	Known	01-JAN-2015	31-MAR-2015	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811011	Known	01-OCT-2014	31-DEC-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811009	Known	01-JUL-2014	30-SEP-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811008	Known	01-APR-2014	30-JUN-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811007	Known	01-JUL-2013	30-SEP-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811006	Known	01-APR-2013	30-JUN-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	811005	Known	01-JAN-2013	31-MAR-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	811004	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	711003	Returned to Compliance	01-JUL-2007	30-SEP-2007	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	411001	Returned to Compliance	01-APR-2004	30-APR-2004	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	511002	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
Other	Notification, Public	Miscellaneous Other Rules	-	8400188	Known	01-NOV-1983	30-NOV-1983	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
9911014	811044	SFL	State Administrative/Compliance Order without penalty issued	02-FEB-2023	State	incomplete # of L & C samples
9911013	811033	SFL	State Administrative/Compliance Order without penalty issued	19-MAR-2021	State	-
9911013	811034	SFL	State Administrative/Compliance Order without penalty issued	19-MAR-2021	State	-
9911013	811035	SFL	State Administrative/Compliance Order without penalty issued	19-MAR-2021	State	-
9911012	811049	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811048	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811047	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811032	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811039	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811038	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811037	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811036	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811051	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811052	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811053	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811054	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811045	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811027	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811028	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911012	811030	SFL	State Administrative/Compliance Order without penalty issued	12-NOV-2020	State	-
9911009	811022	SOX	State Compliance achieved	27-NOV-2017	State	-
9911004	811026	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811025	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811024	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811023	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811021	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811020	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811019	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811018	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811017	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811016	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811015	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811014	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811013	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811012	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811011	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911004	811009	SFL	State Administrative/Compliance Order without penalty issued	30-DEC-2014	State	Stage 2 TTHM MCL
9911005	811008	SO6	State Intentional no-action	30-DEC-2014	State	-
9911005	811007	SO6	State Intentional no-action	30-DEC-2014	State	-
9911005	811006	SO6	State Intentional no-action	30-DEC-2014	State	-
9911005	811005	SO6	State Intentional no-action	30-DEC-2014	State	-
811005	711003	SOX	State Compliance achieved	01-JAN-2008	State	ENF_NO:03-11-07O-005; RETURNED TO COMPLIANCE
811005	811004	SOX	State Compliance achieved	01-JAN-2008	State	ENF_NO:03-11-07O-005; RETURNED TO COMPLIANCE
511003	411001	SFL	State Administrative/Compliance Order without penalty issued	22-SEP-2004	State	ENF_NO:03-11-04C-010; DISINFECTION PROCESS FAILURE PROVIDE INCIDENT RPT,PN,PERFORM TRACER STUDY
1011006	511002	SOX	State Compliance achieved	01-APR-2004	State	RTC

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
RAW CROSS COLONY CANAL - INACTIVE	29186	Yes	Intake	Surface water	Emergency	Inactive
WELL 07 - AGRICULTURAL - INACTIVE	21996	Yes	Well	Ground water	Other	Inactive
WELL 25 - AGRICULTURAL - INACTIVE	21993	Yes	Well	Ground water	Other	Inactive
CALIFORNIA AQUEDUCT INTAKE - RAW	29184	Yes	Intake	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	29185	No	Distribution System/Zone	-	-	Active
DOS PALOS WTP - TREATED	3962	No	Treatment Plant	-	-	Active
TREATED CROSS CANAL - INACTIVE	6798	No	Treatment Plant	-	-	Inactive

1 - 7 of 7

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
DOS PALOS WTP - TREATED	3962	Filtration, Rapid Sand	Particulate removal
DOS PALOS WTP - TREATED	3962	Sedimentation	Particulate removal
DOS PALOS WTP - TREATED	3962	Chloramines	Disinfection
DOS PALOS WTP - TREATED	3962	Activated Carbon, Granular	Organics removal
DOS PALOS WTP - TREATED	3962	Coagulation	Particulate removal
DOS PALOS WTP - TREATED	3962	Flocculation	Particulate 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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