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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, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	5	Returned to Compliance	01-APR-2025	30-APR-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	6	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1	Returned to Compliance	01-SEP-2010	30-SEP-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	2	Returned to Compliance	01-JUL-2010	30-SEP-2010	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
13	5	SOX	State Compliance achieved	03-NOV-2025	State	System has returned to a routine RTCR and MRDL monitoring and reporting schedule and has returned to compliance with regard to these violations.
13	6	SOX	State Compliance achieved	03-NOV-2025	State	System has returned to a routine RTCR and MRDL monitoring and reporting schedule and has returned to compliance with regard to these violations.
6	1	SOX	State Compliance achieved	20-JUN-2011	State	System has resumed required sampling. RTC according to new RTC definitions.
6	2	SOX	State Compliance achieved	20-JUN-2011	State	System has resumed required sampling. RTC according to new RTC definitions.

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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
CC FROM MAYVILLE CITY OF	11875	Yes	Consecutive Connection	Ground water	Permanent	Active
WELL #19	2067	Yes	Well	Ground water	Permanent	Inactive
WELL #18	2065	Yes	Well	Ground water	Permanent	Inactive
WELL #17	2063	Yes	Well	Ground water	Permanent	Inactive
WELL #16	2061	Yes	Well	Ground water	Permanent	Inactive
WELL #15	2058	Yes	Well	Ground water	Permanent	Inactive
WELL #14	2055	Yes	Well	Ground water	Permanent	Inactive
WELL #13	2051	Yes	Well	Ground water	Permanent	Inactive
WELL #12	2047	Yes	Well	Ground water	Permanent	Inactive
WELL #11	2040	Yes	Well	Ground water	Permanent	Active
WELL #10	2032	Yes	Well	Ground water	Permanent	Active
WELL #9	2024	Yes	Well	Ground water	Permanent	Active
WELL #8	2015	Yes	Well	Ground water	Permanent	Active
WELL #6	1988	Yes	Well	Ground water	Permanent	Active
WELL #5	1961	Yes	Well	Ground water	Permanent	Active
WELL #4	1906	Yes	Well	Ground water	Permanent	Active
WELL #3	1804	Yes	Well	Ground water	Permanent	Active
WELL #2	1609	Yes	Well	Ground water	Permanent	Active
MOTTER WELL #4	12272	Yes	Well	Ground water	Permanent	Active
MOTTER WELL #3	12271	Yes	Well	Ground water	Permanent	Active
MOTTER WELL #2	12270	Yes	Well	Ground water	Permanent	Active
MOTTER WELL #1	12269	Yes	Well	Ground water	Permanent	Active
VOLLA #4	11870	Yes	Well	Ground water	Permanent	Active
VOLLA #3	11869	Yes	Well	Ground water	Permanent	Active
VOLLA #2	11868	Yes	Well	Ground water	Permanent	Active
VOLLA #1	11867	Yes	Well	Ground water	Permanent	Active
WELL #1	1055	Yes	Well	Ground water	Permanent	Active
CC FROM HILLSBORO CITY OF	12502	Yes	Consecutive Connection	Ground water	Permanent	Active
COMMON HEADER	11787	No	Common Headers	-	-	Active
COMMON HEADER 2	11871	No	Common Headers	-	-	Inactive
EAST CENTRAL REGIONAL WD-TRAILL	4072	No	Distribution System/Zone	-	-	Active
IDSE FACILITY	11467	No	Distribution System/Zone	-	-	Inactive
DIST TO MAYVILLE	11872	No	Distribution System/Zone	-	-	Inactive
SAMPLE STATION	2625	No	Sampling Station	-	-	Inactive
TRAILL RESERVOIR (RAW WATER)	12503	No	Storage	-	-	Active
TREATMENT PLANT	3083	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	3083	Fluoridation	Other
TREATMENT PLANT	3083	Gaseous Chlorination, Post	Disinfection
TREATMENT PLANT	3083	Inhibitor, Polyphosphate	Corrosion control
TREATMENT PLANT	3083	Filtration, Greensand	Iron removal
TREATMENT PLANT	3083	Gaseous Chlorination, Pre	Iron removal
TREATMENT PLANT	3083	Permanganate	Iron removal
TREATMENT PLANT	3083	Filtration, Greensand	Manganese removal
TREATMENT PLANT	3083	Gaseous Chlorination, Pre	Manganese removal
TREATMENT PLANT	3083	Permanganate	Manganese removal
TREATMENT PLANT	3083	Gaseous Chlorination, Pre	Disinfection

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