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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	811007	Returned to Compliance	01-APR-2025	30-APR-2025	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	811006	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	811004	Returned to Compliance	01-APR-2008	30-JUN-2008	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	711003	Returned to Compliance	01-MAY-2007	31-MAY-2007	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	611002	Returned to Compliance	01-JAN-2006	31-DEC-2006	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	511001	Returned to Compliance	01-JAN-2005	31-JAN-2005	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
9711008	811007	SOX	State Compliance achieved	15-SEP-2025	State	-
9711006	811006	SOX	State Compliance achieved	15-JUN-2023	State	-
911009	811004	SOX	State Compliance achieved	21-JUL-2008	State	ENF_NO:03-11-08O-001;
711004	711003	SIA	State Violation/Reminder Notice	25-JUL-2007	State	ENF_NO:03-11-07E-053; MR3 MAY 2007 INCORRECT #OF ROU'S
711007	611002	SOX	State Compliance achieved	19-MAR-2007	State	ENF_NO:03-11-07E-013; COLLECTED NITRATE SAMPLES
1011010	511001	SOX	State Compliance achieved	01-FEB-2005	State	RTC

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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
SIERRA VILLAGE MWC - EMERGENCY INTERTIE	57444	Yes	Consecutive Connection	Ground water	Emergency	Active
WELL 01	14776	Yes	Well	Ground water	Permanent	Active
WELL 02	14775	Yes	Well	Ground water	Permanent	Active
WELL 03	14774	Yes	Well	Ground water	Permanent	Active
MAIN TUOLUMNE DITCH INTAKE - RAW	33964	Yes	Intake	Surface water	Permanent	Active
LITTLE SUGAR PINE CREEK INTAKE-INACTIVE	33963	Yes	Intake	Surface water	Other	Inactive
MI WUK HEIGHTS - EMERGENCY INTERTIE	57445	Yes	Consecutive Connection	Ground water	Emergency	Active
TUD - UPPER BASIN - EMERGENCY INTERTIE	57446	Yes	Consecutive Connection	Surface water	Emergency	Active
DISTRIBUTION SYSTEM	33962	No	Distribution System/Zone	-	-	Active
MI WUK WTP - TREATED	4118	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
MI WUK WTP - TREATED	4118	Gaseous Chlorination, Pre	Disinfection
MI WUK WTP - TREATED	4118	pH Adjustment, Post	Corrosion control
MI WUK WTP - TREATED	4118	Filtration, Pressure Sand	Particulate removal
MI WUK WTP - TREATED	4118	Sedimentation	Particulate removal
MI WUK WTP - TREATED	4118	Flocculation	Particulate removal
MI WUK WTP - TREATED	4118	Rapid Mix	Particulate removal
MI WUK WTP - TREATED	4118	Coagulation	Particulate removal
MI WUK WTP - TREATED	4118	Gaseous Chlorination, Post	Disinfection

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