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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
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	7152185	Open	01-JUL-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	7152182	Returned to Compliance	01-OCT-2017	30-SEP-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	7152181	Returned to Compliance	01-OCT-2017	30-SEP-2018	No
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	3019195	Returned to Compliance	01-JAN-1995	31-MAR-1995	Yes
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	2804495	Returned to Compliance	01-OCT-1994	31-DEC-1994	Yes
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	1985793	Known	01-SEP-1993	31-AUG-1996	Yes
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	1237690	Known	01-SEP-1990	30-SEP-1994	Yes
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	370487	Known	01-SEP-1987	31-AUG-1990	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	486	Known	01-JAN-1986	31-DEC-1988	No
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	268084	Known	10-SEP-1984	09-SEP-1987	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7152180	Known	30-JUN-1977	29-JUN-1981	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
4531606	7152185	SIA	State Violation/Reminder Notice	29-JUL-2025	State	-
4531599	7152181	SOX	State Compliance achieved	27-SEP-2019	State	-
4531599	7152182	SOX	State Compliance achieved	27-SEP-2019	State	-
4531595	3019195	SOX	State Compliance achieved	01-MAY-1995	State	-
4531295	2804495	SOX	State Compliance achieved	27-APR-1995	State	-
2161294	1237690	SIF	State Public Notification received	23-AUG-1994	State	-
2161194	370487	SIF	State Public Notification received	23-AUG-1994	State	-
2161394	268084	SIF	State Public Notification received	23-AUG-1994	State	-
2161594	1985793	SIF	State Public Notification received	23-AUG-1994	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
WELL SEALED (ABANDONED)	20984	Yes	Well	Ground water	Other	Inactive
WELL 4 (00859)	18665	Yes	Well	Ground water	Permanent	Active
WELL 3 (00858)	18664	Yes	Well	Ground water	Permanent	Active
WELL 2-SEALED (ABANDONED)	20985	Yes	Well	Ground water	Other	Inactive
NEW BOSTON	24642	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	46785	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	28301	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	30723	No	Sampling Station	-	-	Active
ELEVATED TANK - 50000-GAL	11591	No	Storage	-	-	Active
TAP 02 GROUND STORAGE	12992	No	Storage	-	-	Active
TP 02-GREENSAND FILTER PLANT	16771	No	Treatment Plant	-	-	Active
TP 01-ABANDONED	32949	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 02-GREENSAND FILTER PLANT	16771	Fluoridation	Other
TP 02-GREENSAND FILTER PLANT	16771	Hypochlorination, Post	Disinfection
TP 02-GREENSAND FILTER PLANT	16771	Filtration, Greensand	Iron removal
TP 02-GREENSAND FILTER PLANT	16771	Aeration, Slat Tray	Iron removal
TP 02-GREENSAND FILTER PLANT	16771	Permanganate	Iron removal
TP 02-GREENSAND FILTER PLANT	16771	Filtration, Greensand	Manganese removal

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