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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
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	414	Returned to Compliance	01-JAN-2025	31-MAR-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	413	Returned to Compliance	01-OCT-2024	31-DEC-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	412	Returned to Compliance	01-JUL-2024	30-SEP-2024	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	294	Known	01-AUG-1993	31-AUG-1993	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	293	Known	01-AUG-1993	31-AUG-1993	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	193	Known	01-DEC-1992	31-DEC-1992	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	1617780	Known	01-JUL-1976	30-JUN-1980	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	1617880	Known	01-JUL-1976	30-JUN-1980	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
11	412	SOX	State Compliance achieved	28-MAY-2025	Region	RTC with LRAA under MCL from sample collected 5/21/2025 -BCS 5/28/2025
13	414	SOX	State Compliance achieved	28-MAY-2025	Region	RTC with LRAA under MCL from sample collected 5/21/2025 -BCS 5/28/2025
12	413	SOX	State Compliance achieved	28-MAY-2025	Region	RTC with LRAA under MCL from sample collected 5/21/2025 -BCS 5/28/2025

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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
CENTRAL WY REG WS JPB (WY5600009)	20764	Yes	Consecutive Connection	Surface water	Emergency	Active
WELL #6	17181	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #1	11978	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #3	11977	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #5	11976	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #2	11975	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #8 (WARDWELL)	11974	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #9	11972	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NORTH PLATTE RIVER	11971	Yes	Intake	Surface water	Permanent	Inactive
PLATTE INFILTRATION GALLERY	19953	Yes	Infiltration Gallery	Ground water under the influence of surface water	Permanent	Active
TOWN OF MILLS	11973	No	Distribution System/Zone	-	-	Active
MILLS, TOWN OF	14526	No	Other	-	-	Inactive
PRESSURE PUMP	18305	No	Pump Facility	-	-	Active
MILLS STORAGE TANK #1 (0.6 MG)	16798	No	Storage	-	-	Active
MILLS STORAGE TANK #2 (2.5 MG)	16799	No	Storage	-	-	Active
MILLS STORAGE TANK #3 (1.5 MG)	16800	No	Storage	-	-	Active
WTP STORAGE TANK (200K-GAL)	16801	No	Storage	-	-	Active
TREATMENT PLANT	14974	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	14974	Permanganate	Manganese removal
TREATMENT PLANT	14974	Inhibitor, Polyphosphate	Corrosion control
TREATMENT PLANT	14974	Lime - Soda Ash Addition	Particulate removal
TREATMENT PLANT	14974	Filtered	Particulate removal
TREATMENT PLANT	14974	Coagulation	Particulate removal
TREATMENT PLANT	14974	Inhibitor, Polyphosphate	Corrosion control
TREATMENT PLANT	14974	Gaseous Chlorination, Post	Disinfection

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