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PWS ID	CA5510007
PWS Name	DEL ORO WATER COMPANY - STRAWBERRY DIV.
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	1295
County Served	Tuolumne

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	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9711018	Returned to Compliance	01-FEB-2025	28-FEB-2025	Yes
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	9711012	Returned to Compliance	01-SEP-2018	30-SEP-2018	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9711011	Returned to Compliance	01-FEB-2018	28-FEB-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	911014	Returned to Compliance	01-JAN-2009	31-MAR-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	511013	Returned to Compliance	01-APR-2005	30-JUN-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	511010	Returned to Compliance	01-JAN-2005	31-MAR-2005	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	411011	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
TT	Treatment Technique Precursor Removal	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	411012	Returned to Compliance	01-JAN-2004	31-MAR-2004	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9711009	Returned to Compliance	01-MAY-1997	31-MAY-1997	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9711008	Returned to Compliance	01-APR-1997	30-APR-1997	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9711007	Returned to Compliance	01-DEC-1996	31-DEC-1996	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9611005	Returned to Compliance	01-JUL-1996	31-JUL-1996	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	9611006	Returned to Compliance	01-JUL-1996	31-JUL-1996	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9611003	Returned to Compliance	01-JUN-1996	30-JUN-1996	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	9611004	Returned to Compliance	01-JUN-1996	30-JUN-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	9611002	Returned to Compliance	01-OCT-1995	31-OCT-1995	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	9511001	Returned to Compliance	01-OCT-1994	31-OCT-1994	Yes
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	95V0001	Returned to Compliance	01-JUL-1993	31-DEC-2003	No
Other	Notification, Public	Miscellaneous Other Rules	-	8908016	Known	01-JUL-1989	31-JUL-1989	No
Other	Notification, Public	Miscellaneous Other Rules	-	8400604	Known	01-DEC-1983	31-DEC-1983	No
Other	Notification, Public	Miscellaneous Other Rules	-	8400608	Known	01-NOV-1983	30-NOV-1983	No
Other	Notification, Public	Miscellaneous Other Rules	-	8400606	Known	01-OCT-1983	31-OCT-1983	No
Other	Notification, Public	Miscellaneous Other Rules	-	8010242	Known	30-JUL-1980	29-OCT-1980	No
Other	Notification, Public	Miscellaneous Other Rules	-	8010238	Known	28-JUL-1980	27-OCT-1980	No
Other	Notification, Public	Miscellaneous Other Rules	-	8010240	Known	30-JAN-1980	29-MAY-1980	No
Other	Notification, Public	Miscellaneous Other Rules	-	8010236	Known	28-JAN-1980	27-MAY-1980	No
Other	Notification, Public	Miscellaneous Other Rules	-	8010244	Known	30-DEC-1979	29-JAN-1980	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
9711033	9711018	SOX	State Compliance achieved	08-SEP-2025	State	-
9711028	9711012	SOX	State Compliance achieved	02-OCT-2019	State	-
9711025	9711011	SOX	State Compliance achieved	06-JUN-2018	State	-
1011023	911014	SOX	State Compliance achieved	10-APR-2009	State	ENF_NO:03-11-09O-004; SENT SYSTEM RET TO COM LTR RETURNED TO COMPLIANCE
1011023	411012	SOX	State Compliance achieved	10-APR-2009	State	ENF_NO:03-11-09O-004; SENT SYSTEM RET TO COM LTR RETURNED TO COMPLIANCE
1011023	411011	SOX	State Compliance achieved	10-APR-2009	State	ENF_NO:03-11-09O-004; SENT SYSTEM RET TO COM LTR RETURNED TO COMPLIANCE
1011024	511013	SOX	State Compliance achieved	01-JUL-2005	State	RTC
1011024	511010	SOX	State Compliance achieved	01-JUL-2005	State	RTC
0399999	95V0001	EOX	Federal Compliance achieved	31-DEC-2003	ODSWeb	-
9711021	9711009	SOX	State Compliance achieved	01-JUN-1997	State	ENF_NO:03-11-97C-013; STANDARD NTU PN METHODS 2 AND 4
9711019	9711008	SOX	State Compliance achieved	27-MAY-1997	State	ENF_NO:03-11-97C-013; STANDARD NTU PN METHODS 2 AND 4
9711017	9711007	SOX	State Compliance achieved	03-FEB-1997	State	ENF_NO:03-11-97C-001; STANDARD NTU PN METHOD 2
9711015	9611006	SOX	State Compliance achieved	07-AUG-1996	State	ENF_NO:03-11-96C-022; STANDARD TCR/REPEAT MON PN METHOD 2
9711015	9611005	SOX	State Compliance achieved	07-AUG-1996	State	ENF_NO:03-11-96C-022; STANDARD TCR/REPEAT MON PN METHOD 2
9711013	9611004	SOX	State Compliance achieved	07-AUG-1996	State	ENF_NO:03-11-96C-022; STANDARD TCR/REPEAT MON PN METHOD 2
9711013	9611003	SOX	State Compliance achieved	07-AUG-1996	State	ENF_NO:03-11-96C-022; STANDARD TCR/REPEAT MON PN METHOD 2
9611011	9611002	SOX	State Compliance achieved	04-DEC-1995	State	ENF_NO:03-11-96C-029; M AND R VIOLATION TCR PN METHOD 2
9511009	9511001	SOX	State Compliance achieved	10-NOV-1994	State	-

1 - 18 of 18

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
SOUTH FORK - STANISLAUS RIVER - EMERGENC	57124	Yes	Intake	Surface water	Emergency	Inactive
HERRING CREEK - RAW	33966	Yes	Intake	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	33965	No	Distribution System/Zone	-	-	Active
DEL ORO STRAWBERRY WTP - TREATED	4117	No	Treatment Plant	-	-	Active

1 - 4 of 4

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
DEL ORO STRAWBERRY WTP - TREATED	4117	Hypochlorination, Pre	Disinfection
DEL ORO STRAWBERRY WTP - TREATED	4117	Hypochlorination, Post	Disinfection
DEL ORO STRAWBERRY WTP - TREATED	4117	pH Adjustment, Post	Corrosion control
DEL ORO STRAWBERRY WTP - TREATED	4117	Permanganate	Organics removal
DEL ORO STRAWBERRY WTP - TREATED	4117	Coagulation	Particulate removal
DEL ORO STRAWBERRY WTP - TREATED	4117	Filtration, Pressure Sand	Particulate removal
DEL ORO STRAWBERRY WTP - TREATED	4117	Sedimentation	Particulate removal
DEL ORO STRAWBERRY WTP - TREATED	4117	Flocculation	Particulate removal
DEL ORO STRAWBERRY WTP - TREATED	4117	Coagulation	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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