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Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	ME0091510
PWS Name	STONINGTON WATER COMPANY
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	683
County Served	Hancock

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.

Violations

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	103051	Known	01-JUL-2023	30-SEP-2023	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	103047	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	103048	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	103040	Returned to Compliance	01-JUL-2021	30-SEP-2021	Yes
MCL	Maximum Contaminant Level Violation, E. coli (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	103033	Returned to Compliance	01-DEC-2020	31-DEC-2020	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	103030	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	103031	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	103027	Returned to Compliance	01-JAN-2019	31-MAR-2019	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	103024	Returned to Compliance	01-JAN-2019	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	103026	Returned to Compliance	01-JAN-2019	31-MAR-2019	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	103023	Returned to Compliance	01-OCT-2018	31-DEC-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	103011	Returned to Compliance	01-OCT-2012	31-DEC-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	103010	Returned to Compliance	01-JUL-2012	30-SEP-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	103009	Returned to Compliance	01-OCT-2008	31-DEC-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	103008	Returned to Compliance	01-JUL-2008	30-SEP-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	102908	Returned to Compliance	01-APR-2008	30-JUN-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	102208	Returned to Compliance	01-JAN-2008	31-MAR-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	102108	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	102708	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	102608	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	102808	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	102408	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	102308	Returned to Compliance	01-JAN-2007	31-DEC-2007	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	100599	Returned to Compliance	01-NOV-1998	30-NOV-1998	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	82996	Returned to Compliance	01-MAY-1996	31-MAY-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	82896	Returned to Compliance	01-APR-1996	30-APR-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	82796	Returned to Compliance	01-MAR-1996	31-MAR-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	82696	Returned to Compliance	01-FEB-1996	29-FEB-1996	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	82596	Returned to Compliance	01-OCT-1995	31-OCT-1995	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	3012194	Known	01-MAY-1994	31-MAY-1994	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	3012094	Known	01-APR-1994	30-APR-1994	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1026794	Known	01-DEC-1993	31-DEC-1993	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1026694	Known	01-NOV-1993	30-NOV-1993	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1026594	Known	01-OCT-1993	31-OCT-1993	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2007693	Returned to Compliance	01-MAR-1993	31-MAR-1993	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	3V94	Known	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	2V94	Known	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	1V94	Known	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	5V94	Known	01-JAN-1993	31-DEC-1993	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	4V94	Known	01-JAN-1993	31-DEC-1993	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5583	103047	SIF	State Public Notification received	10-JUN-2024	State	-
5584	103048	SIF	State Public Notification received	10-JUN-2024	State	-
5582	103051	SIF	State Public Notification received	10-JUN-2024	State	-
5571	103040	SOX	State Compliance achieved	15-DEC-2021	State	-
5563	103033	SIF	State Public Notification received	21-JAN-2021	State	-
5555	82696	SO6	State Intentional no-action	31-MAR-2020	State	PN Requirement SO6'd- the PN requirement for this violation should have been resolved during the EPA PN cleanup in 2011 but due to an error in how the violation was created, it was not pulled up in the original query;
5555	82896	SO6	State Intentional no-action	31-MAR-2020	State	PN Requirement SO6'd- the PN requirement for this violation should have been resolved during the EPA PN cleanup in 2011 but due to an error in how the violation was created, it was not pulled up in the original query;
5555	82996	SO6	State Intentional no-action	31-MAR-2020	State	PN Requirement SO6'd- the PN requirement for this violation should have been resolved during the EPA PN cleanup in 2011 but due to an error in how the violation was created, it was not pulled up in the original query;
5555	100599	SO6	State Intentional no-action	31-MAR-2020	State	PN Requirement SO6'd- the PN requirement for this violation should have been resolved during the EPA PN cleanup in 2011 but due to an error in how the violation was created, it was not pulled up in the original query;
5555	82796	SO6	State Intentional no-action	31-MAR-2020	State	PN Requirement SO6'd- the PN requirement for this violation should have been resolved during the EPA PN cleanup in 2011 but due to an error in how the violation was created, it was not pulled up in the original query;
5554	103031	SOX	State Compliance achieved	10-FEB-2020	State	TTHM (2002145-01) and HAA5 (2002140-01) taken 2/10/20
5554	103030	SOX	State Compliance achieved	10-FEB-2020	State	TTHM (2002145-01) and HAA5 (2002140-01) taken 2/10/20
5543	103027	SIF	State Public Notification received	17-SEP-2019	State	-
5539	103024	SIF	State Public Notification received	04-JUN-2019	State	-
5539	103026	SIF	State Public Notification received	04-JUN-2019	State	-
5557	103023	SOX	State Compliance achieved	29-APR-2019	State	SOX per Rules
5519	103011	SOX	State Compliance achieved	04-JUN-2013	State	-
5519	103010	SOX	State Compliance achieved	04-JUN-2013	State	-
5512	102308	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	103009	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	103008	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102908	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102808	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102708	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102608	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102408	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102208	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	82596	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
5512	102108	SOX	State Compliance achieved	07-JAN-2010	State	Although on EPA SNC Tool, all violations are resolved. ???
6E94	1026694	EFL	Federal Final Administrative Order issued	13-MAY-1994	ODSWeb	-
6E94	1026594	EFL	Federal Final Administrative Order issued	13-MAY-1994	ODSWeb	-
6E94	1026794	EFL	Federal Final Administrative Order issued	13-MAY-1994	ODSWeb	-
4E94	2V94	SIF	State Public Notification received	05-MAY-1994	State	-
4E94	4V94	SIF	State Public Notification received	05-MAY-1994	State	-
4E94	1V94	SIF	State Public Notification received	05-MAY-1994	State	-
4E94	5V94	SIF	State Public Notification received	05-MAY-1994	State	-
4E94	3V94	SIF	State Public Notification received	05-MAY-1994	State	-
2010193	2007693	SIE	State Public Notification requested	27-APR-1993	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
BURNTLAND POND	10537	Yes	Intake	Surface water	Permanent	Inactive
370' BR WELL 8 2002 @ 8GPM	4441	Yes	Well	Ground water	Seasonal	Inactive
300' BR WELL 9 2-1-1999 @ 8GPM	4572	Yes	Well	Ground water	Seasonal	Active
378' BR WELL 7 2002 @ 10GPM	4440	Yes	Well	Ground water	Seasonal	Active
415' BR WELL 6 2002 @ 7GPM	4439	Yes	Well	Ground water	Seasonal	Active
420' BR WELL 4 2002 @ 8GPM	4270	Yes	Well	Ground water	Seasonal	Active
465' DR WELL 10 1-1-1992 @14GPM	17247	Yes	Well	Ground water	Seasonal	Active
345' BR WELL 5 @ 20GPM	4271	Yes	Well	Ground water	Permanent	Inactive
305' BR WELL 3 1-1-1995 @ 8GPM	4093	Yes	Well	Ground water	Permanent	Active
312' BR WELL 2 2002 @ 10.5GPM	4092	Yes	Well	Ground water	Permanent	Active
STAGE 2 IDSE	14199	No	Distribution System/Zone	-	-	Active
DISTRIBUTION SYSTEM	8553	No	Distribution System/Zone	-	-	Active
EP (102, 103, 501A, 513A, 606A)	13725	No	Other	-	-	Active
EP (MANIFOLD 1, MANIFOLD 2 - ALL WELLS)	13726	No	Other	-	-	Inactive
EP (FILTER PLANT AND ALL WELLS)	13727	No	Other	-	-	Inactive
HISTORICAL DATA	6219	No	Sampling Station	-	-	Active
EP (TW-205 AND TW-110)	8554	No	Sampling Station	-	-	Inactive
CLEARWELL	13728	No	Storage	-	-	Active
STEEL STANDPIPE	247	No	Storage	-	-	Active
OLD STANDPIPE	129	No	Storage	-	-	Inactive
GROUNDWATER TREATMENT	1814	No	Treatment Plant	-	-	Active
SURFACE WATER TREATMENT	1813	No	Treatment Plant	-	-	Inactive
TREAT FACILITY NO. 4	1815	No	Treatment Plant	-	-	Inactive
TREAT FACILITY NO. 5	1816	No	Treatment Plant	-	-	Inactive

1 - 24 of 24

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
SURFACE WATER TREATMENT	1813	Filtration, Ultrafiltration	Particulate removal
SURFACE WATER TREATMENT	1813	Reverse Osmosis	Inorganics removal
SURFACE WATER TREATMENT	1813	Coagulation	Inorganics removal
SURFACE WATER TREATMENT	1813	Hypochlorination, Post	Disinfection
GROUNDWATER TREATMENT	1814	Ion Exchange	Inorganics removal
GROUNDWATER TREATMENT	1814	Ion Exchange	Inorganics removal
GROUNDWATER TREATMENT	1814	Hypochlorination, Pre	Disinfection
GROUNDWATER TREATMENT	1814	Aeration, Diffused	Radionuclides removal
GROUNDWATER TREATMENT	1814	Filtration, Cartridge	Particulate removal
GROUNDWATER TREATMENT	1814	Filtration, Cartridge	Particulate removal
GROUNDWATER TREATMENT	1814	Filtration, Cartridge	Particulate removal
TREAT FACILITY NO. 4	1815	Hypochlorination, Pre	Disinfection
TREAT FACILITY NO. 4	1815	Aeration, Diffused	Corrosion control

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For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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