Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MA4197001
PWS Name	SIASCONSET WATER DEPARTMENT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	3000
County Served	Nantucket

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
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	85	Open	02-JUL-2025	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	84	Known	01-APR-2025	30-JUN-2025	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	45	Returned to Compliance	01-JUL-2022	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	44	Returned to Compliance	01-JUN-2013	30-JUN-2013	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	43	Returned to Compliance	01-MAY-2013	31-MAY-2013	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	42	Returned to Compliance	01-AUG-2010	31-AUG-2010	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	41	Returned to Compliance	01-AUG-2009	31-AUG-2009	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	39	Returned to Compliance	01-JUN-2007	30-JUN-2007	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	40	Known	01-APR-2007	30-JUN-2007	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	1	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	2	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	3	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	26	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	21	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	28	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	20	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	29	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	27	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	19	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	24	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	23	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	22	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	18	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	11	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	13	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	14	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	6	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	7	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	16	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	4	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	10	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	17	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	25	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	12	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	5	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	30	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	9	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	8	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	15	Known	01-APR-2006	30-JUN-2006	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	92V0008	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	92V0006	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	92V0004	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	92V0003	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	92V0002	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	92V0007	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	92V0010	Known	01-OCT-1990	31-DEC-1990	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	92V0009	Known	01-OCT-1990	31-DEC-1990	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
24	84	SFL	State Administrative/Compliance Order without penalty issued	04-AUG-2025	State	FTM NITRATES AT 10002 & 10004
21	45	SFL	State Administrative/Compliance Order without penalty issued	16-AUG-2022	State	FAILURE TO SUBMIT
20	43	SOX	State Compliance achieved	30-AUG-2013	State	TCR: MONMCL MAY; MINOR REPEATJUNE 2013
20	44	SOX	State Compliance achieved	30-AUG-2013	State	TCR: MONMCL MAY; MINOR REPEATJUNE 2013
18	42	SOX	State Compliance achieved	08-NOV-2010	State	TCR: MONMCL AUG'2010
16	41	SOX	State Compliance achieved	30-NOV-2009	State	TCR: MONMCL AUG'09
14	40	SFL	State Administrative/Compliance Order without penalty issued	16-JAN-2008	State	SAMPLE AND NOTICE
13	39	SOX	State Compliance achieved	06-DEC-2007	State	TCR: MONMCL JUN'07
11	9	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	10	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	11	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	12	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	13	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	14	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	8	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	7	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	6	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	5	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	4	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	3	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	2	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	1	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	15	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	30	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	29	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	28	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	27	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	26	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	25	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	24	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	16	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	17	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	18	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	19	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	20	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	21	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	22	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
11	23	SFL	State Administrative/Compliance Order without penalty issued	15-NOV-2006	State	SAMPLE AND NOTICE
92E0001	92V0003	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0004	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0006	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0007	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0008	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0009	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0002	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED
92E0001	92V0010	SFJ	State Formal Notice of Violation issued	30-APR-1992	State	COMPLIED

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
DUG WELL # 1	1	Yes	Well	Ground water	Emergency	Inactive
WELL NO. 6	4	Yes	Well	Ground water	Permanent	Active
WELL NO. 7	12	Yes	Well	Ground water	Permanent	Active
DUG WELLS # 3 & # 4	3	Yes	Well	Ground water	Other	Active
DUG WELL # 2	2	Yes	Well	Ground water	Other	Active
GP WELL #7 PUMP	13	No	Pump Facility	-	-	Active
DUG WELL # 1 PUMP	5	No	Pump Facility	-	-	Active
DUG WELL # 2 PUMP	6	No	Pump Facility	-	-	Active
DUG WELLS # 3 & # 4 PUMP	7	No	Pump Facility	-	-	Active
WELL NO. 6 PUMP	8	No	Pump Facility	-	-	Active
TANK #2	14	No	Storage	-	-	Active
TANK # 1	9	No	Storage	-	-	Active
SIASCONSET PUMP STATION	11	No	Treatment Plant	-	-	Active
DUG WELL PLANT	10	No	Treatment Plant	-	-	Inactive

1 - 14 of 14

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
SIASCONSET PUMP STATION	11	Inhibitor, Orthophosphate	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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