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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
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	411	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	406	Returned to Compliance	01-JAN-2005	31-OCT-2010	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	304	Returned to Compliance	01-SEP-2003	30-SEP-2003	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	404	Returned to Compliance	01-SEP-2003	30-SEP-2003	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	102	Returned to Compliance	01-MAR-2002	31-MAR-2002	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
2110113	411	SOX	State Compliance achieved	04-APR-2025	State	-
2110108	406	SOX	State Compliance achieved	31-OCT-2011	State	Administrative RTC
2110104	304	SIF	State Public Notification received	06-NOV-2003	State	-
2110104	404	SIF	State Public Notification received	06-NOV-2003	State	-
2109302	102	SIF	State Public Notification received	08-MAY-2002	State	-

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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
CHADRON CREEK INFILTRATION GALLERY	9791	Yes	Infiltration Gallery	Ground water under the influence of surface water	Permanent	Active
WELL 681	6147	Yes	Well	Ground water	Permanent	Active
WELL 684	6146	Yes	Well	Ground water	Permanent	Active
WELL 685	6145	Yes	Well	Ground water	Permanent	Active
WELL 683	3058	Yes	Well	Ground water	Permanent	Active
WELL 682	3056	Yes	Well	Ground water	Permanent	Active
SOUTH DAM INTAKE	8656	Yes	Intake	Surface water	Permanent	Active
NORTH DAM INTAKE	8511	Yes	Intake	Surface water	Permanent	Active
TREATMENT PLANT CLEARWELL	6566	No	Clear Well	-	-	Active
DISTRIBUTION SYSTEM	6452	No	Distribution System/Zone	-	-	Active
PRESSURE REDUCTION STATION	9795	No	Pressure Control	-	-	Active
WELLFIELD PUMPHOUSE	9792	No	Pump Facility	-	-	Active
EAST RESERVOIR PUMP	9793	No	Pump Facility	-	-	Active
HIDDEN VALLEY TRANSFER PUMP	9794	No	Pump Facility	-	-	Active
WEST RESERVOIR AT TP	6564	No	Storage	-	-	Active
EAST RESERVOIR CSC	6565	No	Storage	-	-	Active
HIDDEN VALLEY RESERVOIR	6567	No	Storage	-	-	Active
WELLFIELD RESERVOIR	6568	No	Storage	-	-	Active
HILLTOP RESERVOIR	6569	No	Storage	-	-	Active
TREATMENT PLANT 001	5096	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT 001	5096	Permanganate	Organics removal
TREATMENT PLANT 001	5096	Permanganate	Taste / odor control
TREATMENT PLANT 001	5096	Gaseous Chlorination, Post	Disinfection
TREATMENT PLANT 001	5096	Gaseous Chlorination, Pre	Disinfection
TREATMENT PLANT 001	5096	Gaseous Chlorination, Pre	Organics removal
TREATMENT PLANT 001	5096	Coagulation	Inorganics removal
TREATMENT PLANT 001	5096	Coagulation	Organics removal
TREATMENT PLANT 001	5096	Coagulation	Particulate removal
TREATMENT PLANT 001	5096	Flocculation	Inorganics removal
TREATMENT PLANT 001	5096	Flocculation	Organics removal
TREATMENT PLANT 001	5096	Flocculation	Particulate removal
TREATMENT PLANT 001	5096	Sedimentation	Inorganics removal
TREATMENT PLANT 001	5096	Sedimentation	Organics removal
TREATMENT PLANT 001	5096	Sedimentation	Particulate removal
TREATMENT PLANT 001	5096	Filtration, Rapid Sand	Particulate removal

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