Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MA4020004
PWS Name	HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	35000
County Served	Barnstable

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
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	55	Known	01-APR-2025	30-JUN-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	56	Known	01-APR-2025	30-JUN-2025	No
Other	Failure to Notify Other PWS	Ground Water Rule	Groundwater Rule	49	Returned to Compliance	11-JUL-2017	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	11	Returned to Compliance	01-OCT-2009	-	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	41	Returned to Compliance	01-SEP-2009	30-SEP-2009	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	46	Returned to Compliance	01-AUG-2009	31-AUG-2009	No
Other	Notification, State	Total Coliform Rule	Coliform (TCR)	47	Returned to Compliance	01-AUG-2009	31-AUG-2009	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	39	Returned to Compliance	01-AUG-2009	31-AUG-2009	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	40	Returned to Compliance	01-AUG-2009	31-AUG-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	21	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	31	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	32	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	22	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	30	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	20	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	16	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	23	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	17	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	19	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	15	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	9	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	24	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	36	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	12	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	10	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	27	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	26	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	29	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	14	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	28	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	34	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	18	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	25	Returned to Compliance	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	8	Returned to Compliance	01-FEB-2009	28-FEB-2009	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	4	Returned to Compliance	01-NOV-2007	30-NOV-2007	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	2	Returned to Compliance	01-OCT-2007	31-OCT-2007	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	3	Returned to Compliance	01-OCT-2007	-	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	1	Returned to Compliance	01-DEC-2006	31-DEC-2006	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	03V0002	Known	01-DEC-2002	31-DEC-2002	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	03V0001	Known	01-DEC-2002	31-DEC-2002	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	99V0001	Known	01-OCT-1998	31-DEC-1998	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	99V0002	Returned to Compliance	01-JUL-1998	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	98V0001	Returned to Compliance	01-MAY-1997	31-MAY-1997	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	96V0001	Known	01-AUG-1996	31-AUG-1996	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
40	55	SFL	State Administrative/Compliance Order without penalty issued	09-JUN-2025	State	FTM HAA5 MAY 2025- LAB ERROR
40	56	SFL	State Administrative/Compliance Order without penalty issued	09-JUN-2025	State	FTM HAA5 MAY 2025- LAB ERROR
37	49	SOX	State Compliance achieved	20-OCT-2017	State	-
29	11	SOX	State Compliance achieved	10-OCT-2010	State	-
33	47	SOX	State Compliance achieved	30-APR-2010	State	EPA RTC
33	46	SOX	State Compliance achieved	30-APR-2010	State	EPA RTC
33	41	SOX	State Compliance achieved	30-APR-2010	State	EPA RTC
33	40	SOX	State Compliance achieved	30-APR-2010	State	EPA RTC
27	39	SFL	State Administrative/Compliance Order without penalty issued	30-MAR-2010	State	TCR: MONMCL AUG'2009
32	18	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	36	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	34	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	32	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	31	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	30	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	29	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	28	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	27	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	26	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	25	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	24	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	23	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	12	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	14	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	15	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	16	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	17	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	19	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	20	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	21	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
32	22	SOX	State Compliance achieved	23-DEC-2009	State	EPA RTC
35	10	SOX	State Compliance achieved	24-NOV-2009	State	EPA RTC
35	9	SOX	State Compliance achieved	24-NOV-2009	State	EPA RTC
20	8	SOX	State Compliance achieved	09-SEP-2009	State	NON & RTC ISSUED
30	2	SOX	State Compliance achieved	21-NOV-2007	State	RTC RECORD
30	3	SOX	State Compliance achieved	21-NOV-2007	State	RTC RECORD
30	4	SOX	State Compliance achieved	21-NOV-2007	State	RTC RECORD
16	1	SOX	State Compliance achieved	16-MAY-2007	State	TCR: MIMREP DEC'06
12	03V0001	SFL	State Administrative/Compliance Order without penalty issued	19-FEB-2003	State	PN AS REQUIRED, SYSTEM INCREASED CHLORINATION WITHIN SYSTEM, INCREASED SAMPLING OF SYSTEM.
12	03V0002	SFL	State Administrative/Compliance Order without penalty issued	19-FEB-2003	State	PN AS REQUIRED, SYSTEM INCREASED CHLORINATION WITHIN SYSTEM, INCREASED SAMPLING OF SYSTEM.
10	99V0002	SOX	State Compliance achieved	05-OCT-2000	State	COMPLIED WITH NON
7	99V0001	SFL	State Administrative/Compliance Order without penalty issued	01-MAR-1999	State	MUST SAMPLE AND POST PN
6	98V0001	SOX	State Compliance achieved	08-OCT-1997	State	PUBLISHED P.N.
5	96V0001	SFL	State Administrative/Compliance Order without penalty issued	30-SEP-1996	State	P. NOTICE

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
YARMOUTH PURCHASED WATER	39	Yes	Consecutive Connection	Ground water	Emergency	Inactive
MARY DUNN WELL 3	8	Yes	Well	Ground water	Permanent	Active
MAHER WELL 1	7	Yes	Well	Ground water	Permanent	Active
SIMMONS POND	6	Yes	Well	Ground water	Permanent	Active
MARY DUNN WELL 4A	53	Yes	Well	Ground water	Permanent	Active
MARY DUNN WELL 2	5	Yes	Well	Ground water	Permanent	Active
MARY DUNN WELL 1	4	Yes	Well	Ground water	Permanent	Active
HYANNISPORT	3	Yes	Well	Ground water	Permanent	Active
STRAIGHTWAY WELL 2	22	Yes	Well	Ground water	Permanent	Active
MAHER WELL 2	2	Yes	Well	Ground water	Permanent	Active
MAHER WELL 3	11	Yes	Well	Ground water	Permanent	Active
AIRPORT 1	10	Yes	Well	Ground water	Permanent	Active
STRAIGHTWAY WELL 1	1	Yes	Well	Ground water	Permanent	Active
MARY DUNN WELL 4	9	Yes	Well	Ground water under the influence of surface water	Emergency	Active
COMM PURCHASED WATER	47	Yes	Consecutive Connection	Ground water	Permanent	Active
STRAIGHTWAY WELL 1 PUMP	14	No	Pump Facility	-	-	Active
MAHER WELL 2 PUMP	15	No	Pump Facility	-	-	Active
MARY DUNN WELL 1 PUMP	16	No	Pump Facility	-	-	Active
MARY DUNN WELL 2 PUMP	17	No	Pump Facility	-	-	Active
SIMMONS POND PUMP	18	No	Pump Facility	-	-	Active
MARY DUNN WELL # 3 PUMP	19	No	Pump Facility	-	-	Active
AIRPORT 1 PUMP	21	No	Pump Facility	-	-	Active
STRAIGHTWAY WELL 2 PUMP	23	No	Pump Facility	-	-	Active
MAHER WELL 1 PUMP	34	No	Pump Facility	-	-	Active
MAHER WELL 3 PUMP	35	No	Pump Facility	-	-	Active
HYANNISPORT PUMP	36	No	Pump Facility	-	-	Active
STRAIGHTWAY BOOSTER	37	No	Pump Facility	-	-	Active
MAHER BOOSTER	38	No	Pump Facility	-	-	Active
COMM INTERCONNECTION	49	No	Pump Facility	-	-	Active
MARY DUNN WELL 4A PUMP	55	No	Pump Facility	-	-	Active
MARY DUNN WELL # 4 PUMP	20	No	Pump Facility	-	-	Inactive
MAHER BOOSTER WITH YARMOUTH	45	No	Pump Facility	-	-	Inactive
MARY DUNN TANK #1	12	No	Storage	-	-	Active
MARY DUNN TANK #2	13	No	Storage	-	-	Active
MAHER CT TANK	42	No	Storage	-	-	Active
STRAIGHTWAY CT TANK	43	No	Storage	-	-	Active
AIRPORT WELL 1 PUMPING STATION	30	No	Treatment Plant	-	-	Active
HYANNISPORT TREATMENT PLANT	32	No	Treatment Plant	-	-	Active
STRAIGHTWAY TREATMENT PLANT	33	No	Treatment Plant	-	-	Active
MARY DUNN 1 CARBON FILTERS	40	No	Treatment Plant	-	-	Active
MARY DUNN 2 CARBON FILTERS	41	No	Treatment Plant	-	-	Active
MARY DUNN AIRPORT TREATMENT PLANT	46	No	Treatment Plant	-	-	Active
COMM INTERCONNECTION	48	No	Treatment Plant	-	-	Active
SIMMONS POND WELL	50	No	Treatment Plant	-	-	Active
MARY DUNN 3 CARBON FILTERS	51	No	Treatment Plant	-	-	Active
MAHER FILTRATION PLANT	52	No	Treatment Plant	-	-	Active
MARY DUNN 4A WELL STATION	54	No	Treatment Plant	-	-	Active
MAHER TREATMENT PLANT	25	No	Treatment Plant	-	-	Inactive
MARY DUNN TREATMENT PLANT	26	No	Treatment Plant	-	-	Inactive
MAHER 1,3 AND YARMOUTH WATER	44	No	Treatment Plant	-	-	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
MAHER TREATMENT PLANT	25	Sequestration	Iron removal
MAHER TREATMENT PLANT	25	Aeration, Packed Tower	Organics removal
MAHER TREATMENT PLANT	25	pH Adjustment	Corrosion control
MAHER TREATMENT PLANT	25	Inhibitor, Orthophosphate	Corrosion control
MAHER TREATMENT PLANT	25	Hypochlorination, Post	Disinfection
MARY DUNN TREATMENT PLANT	26	Sequestration	Iron removal
MARY DUNN TREATMENT PLANT	26	pH Adjustment	Corrosion control
MARY DUNN TREATMENT PLANT	26	Inhibitor, Orthophosphate	Corrosion control
MARY DUNN TREATMENT PLANT	26	Hypochlorination, Post	Disinfection
AIRPORT WELL 1 PUMPING STATION	30	Sequestration	Iron removal
HYANNISPORT TREATMENT PLANT	32	Sequestration	Iron removal
HYANNISPORT TREATMENT PLANT	32	pH Adjustment	Corrosion control
HYANNISPORT TREATMENT PLANT	32	Inhibitor, Orthophosphate	Corrosion control
HYANNISPORT TREATMENT PLANT	32	Hypochlorination, Post	Disinfection
HYANNISPORT TREATMENT PLANT	32	Activated Carbon, Granular	Organics removal
STRAIGHTWAY TREATMENT PLANT	33	Sequestration	Iron removal
STRAIGHTWAY TREATMENT PLANT	33	pH Adjustment	Corrosion control
STRAIGHTWAY TREATMENT PLANT	33	Inhibitor, Orthophosphate	Corrosion control
STRAIGHTWAY TREATMENT PLANT	33	Hypochlorination, Post	Disinfection
STRAIGHTWAY TREATMENT PLANT	33	Activated Carbon, Granular	Organics removal
STRAIGHTWAY TREATMENT PLANT	33	4-Log Treatment of Viruses	Disinfection
MARY DUNN 1 CARBON FILTERS	40	Activated Carbon, Granular	Organics removal
MARY DUNN 2 CARBON FILTERS	41	Activated Carbon, Granular	Organics removal
MAHER 1,3 AND YARMOUTH WATER	44	Sequestration	Iron removal
MAHER 1,3 AND YARMOUTH WATER	44	Aeration, Packed Tower	Organics removal
MAHER 1,3 AND YARMOUTH WATER	44	pH Adjustment	Corrosion control
MAHER 1,3 AND YARMOUTH WATER	44	Inhibitor, Orthophosphate	Corrosion control
MAHER 1,3 AND YARMOUTH WATER	44	Hypochlorination, Post	Disinfection
MARY DUNN AIRPORT TREATMENT PLANT	46	Sequestration	Iron removal
MARY DUNN AIRPORT TREATMENT PLANT	46	pH Adjustment	Corrosion control
MARY DUNN AIRPORT TREATMENT PLANT	46	Inhibitor, Orthophosphate	Corrosion control
MARY DUNN AIRPORT TREATMENT PLANT	46	Hypochlorination, Post	Disinfection
MARY DUNN AIRPORT TREATMENT PLANT	46	Activated Carbon, Granular	Organics removal
COMM INTERCONNECTION	48	Hypochlorination, Post	Disinfection
COMM INTERCONNECTION	48	Inhibitor, Polyphosphate	Corrosion control
COMM INTERCONNECTION	48	4-Log Treatment of Viruses	Disinfection
SIMMONS POND WELL	50	Sequestration	Iron removal
MARY DUNN 3 CARBON FILTERS	51	Activated Carbon, Granular	Organics removal
MAHER FILTRATION PLANT	52	pH Adjustment	Corrosion control
MAHER FILTRATION PLANT	52	Hypochlorination, Pre	Disinfection
MAHER FILTRATION PLANT	52	Filtration, Greensand	Manganese removal
MAHER FILTRATION PLANT	52	Aeration, Packed Tower	Organics removal
MAHER FILTRATION PLANT	52	Peroxide	Organics removal
MAHER FILTRATION PLANT	52	Ultraviolet Radiation	Organics removal
MAHER FILTRATION PLANT	52	Activated Carbon, Granular	Organics removal
MAHER FILTRATION PLANT	52	Hypochlorination, Post	Disinfection
MAHER FILTRATION PLANT	52	pH Adjustment, Post	Corrosion control
MAHER FILTRATION PLANT	52	Inhibitor, Orthophosphate	Corrosion control
MAHER FILTRATION PLANT	52	4-Log Treatment of Viruses	Disinfection
MARY DUNN 4A WELL STATION	54	Sequestration	Iron removal

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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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