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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.

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Violations

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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
MON	Monitoring, Lab Certification/Method Error (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	511007	Returned to Compliance	01-APR-2025	31-MAY-2025	No
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	511006	Open	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	511005	Open	17-OCT-2024	-	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	511003	Returned to Compliance	01-JAN-2005	31-DEC-2005	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	411002	Returned to Compliance	01-APR-2004	30-JUN-2004	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	511001	Returned to Compliance	01-JAN-2004	31-MAR-2004	Yes
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

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9911007	511007	SOX	State Compliance achieved	15-SEP-2025	State	-
711007	511003	SOX	State Compliance achieved	11-MAY-2006	State	ENF_NO:03-11-06E-030; COLLECTED 2006 NO3 SAMPLE
1011008	411002	SOX	State Compliance achieved	01-JUL-2004	State	RTC
1011008	511001	SOX	State Compliance achieved	01-JUL-2004	State	RTC
00E0001	95V0001	EOX	Federal Compliance achieved	01-MAR-2000	ODSWeb	-

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
NORTH FORK TUOLUMNE - RAW	33957	Yes	Intake	Surface water	Permanent	Active
CHINQUAPIN WELL	17614	Yes	Well	Ground water	Permanent	Active
MEADOWVIEW WELL	17613	Yes	Well	Ground water	Permanent	Active
SHEERING CREEK - RAW	33959	Yes	Intake	Surface water	Permanent	Active
PINECREST LAKE - RAW	33958	Yes	Intake	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	33956	No	Distribution System/Zone	-	-	Active
INTERTIE WITH USFS PINECREST REC AREA	63727	No	Transmission Main (Manifold)	-	-	Inactive
PINECREST LAKE WTP - TREATED	4120	No	Treatment Plant	-	-	Active
N FK TUOL/SHEER CK WTP - TREATED	4121	No	Treatment Plant	-	-	Active
MEADOW WELL - TRT CL & CCT	66818	No	Treatment Plant	-	-	Active
CHINQUAPIN WELL TRT-CL	74294	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
PINECREST LAKE WTP - TREATED	4120	Hypochlorination, Post	Disinfection
PINECREST LAKE WTP - TREATED	4120	Filtration, Pressure Sand	Particulate removal
PINECREST LAKE WTP - TREATED	4120	Coagulation	Particulate removal
N FK TUOL/SHEER CK WTP - TREATED	4121	Filtration, Pressure Sand	Particulate removal
N FK TUOL/SHEER CK WTP - TREATED	4121	Coagulation	Particulate removal
N FK TUOL/SHEER CK WTP - TREATED	4121	Gaseous Chlorination, Post	Disinfection
MEADOW WELL - TRT CL & CCT	66818	Hypochlorination, Pre	Disinfection
MEADOW WELL - TRT CL & CCT	66818	Inhibitor, Orthophosphate	Corrosion control
CHINQUAPIN WELL TRT-CL	74294	Hypochlorination, Post	Disinfection

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