Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MA4065000
PWS Name	COHASSET WATER DEPT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	Yes
Population Served	7555
County Served	Norfolk

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	89	Known	01-JUL-2026	30-SEP-2026	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	50	Known	01-APR-2026	30-JUN-2026	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	49	Known	01-JAN-2026	31-MAR-2026	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	48	Known	01-OCT-2025	31-DEC-2025	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	47	Known	01-JUL-2025	30-SEP-2025	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8	Returned to Compliance	01-JUL-2022	-	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	7	Known	01-JUN-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	23	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	58	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	16	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	59	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	17	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	80	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	38	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	51	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	9	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	10	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	52	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	53	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	11	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	34	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	76	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	29	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	71	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	36	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	78	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	28	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	70	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	37	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	79	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	35	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	77	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	69	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	27	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	32	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	74	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	31	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	73	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	72	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	30	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	26	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	68	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	61	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	19	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	63	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	21	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	64	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	22	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	56	Known	01-APR-2021	30-JUN-2021	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	14	Known	01-APR-2021	30-JUN-2021	No

1 - 50 of 82

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
27	50	SFL	State Administrative/Compliance Order without penalty issued	22-SEP-2025	State	TTHM LRAA 3 LOCATIONS 10202, 10204, 10205
27	49	SFL	State Administrative/Compliance Order without penalty issued	22-SEP-2025	State	TTHM LRAA 3 LOCATIONS 10202, 10204, 10205
27	48	SFL	State Administrative/Compliance Order without penalty issued	22-SEP-2025	State	TTHM LRAA 3 LOCATIONS 10202, 10204, 10205
27	47	SFL	State Administrative/Compliance Order without penalty issued	22-SEP-2025	State	TTHM LRAA 3 LOCATIONS 10202, 10204, 10205
27	89	SFL	State Administrative/Compliance Order without penalty issued	22-SEP-2025	State	TTHM LRAA 3 LOCATIONS 10202, 10204, 10205
26	8	SOX	State Compliance achieved	15-AUG-2022	State	RTC FROM LATE CCR SUBMITTAL
24	57	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	58	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	59	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	60	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	61	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	62	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	63	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	64	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	65	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	66	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	67	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	68	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	69	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	70	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	71	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	72	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	73	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	74	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	75	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	76	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	77	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	78	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	79	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	80	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	56	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	55	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	54	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	53	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	52	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	51	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
24	7	SFL	State Administrative/Compliance Order without penalty issued	17-NOV-2021	State	FTM SOC Q2 2021
23	6	SOX	State Compliance achieved	21-FEB-2013	State	TCR: MAJOR REPEAT & NOT VIOLATION DEC 2012
23	5	SOX	State Compliance achieved	21-FEB-2013	State	TCR: MAJOR REPEAT & NOT VIOLATION DEC 2012
19	4	SOX	State Compliance achieved	19-AUG-2010	State	-
16	3	SOX	State Compliance achieved	27-FEB-2009	State	ISSUED NON & RTC
14	1	SOX	State Compliance achieved	02-DEC-2008	State	-
9	00V0001	SIE	State Public Notification requested	10-JUL-2000	State	LAB CERTIFICATION REVOKED
4	96V0001	SIF	State Public Notification received	10-SEP-1996	State	-
3	95V0001	SFL	State Administrative/Compliance Order without penalty issued	25-NOV-1994	State	SEP, OCT REPORTS NOT SUBMITTED BY DEADLINE
9240002	92V0006	SOX	State Compliance achieved	30-AUG-1992	State	-
9240002	92V0004	SOX	State Compliance achieved	30-AUG-1992	State	-
9240002	92V0003	SOX	State Compliance achieved	30-AUG-1992	State	-
9240002	92V0002	SOX	State Compliance achieved	30-AUG-1992	State	-
9240002	92V0001	SOX	State Compliance achieved	30-AUG-1992	State	-

1 - 50 of 51

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
AARON RIVER RESERVOIR	2	Yes	Intake	Surface water	Permanent	Active
ELLMS MEADOW WELLS	3	Yes	Well	Ground water	Permanent	Active
SOHIER G.P. WELL #2	5	Yes	Well	Ground water	Emergency	Active
SOHIER G.P. WELL #1	1	Yes	Well	Ground water	Emergency	Active
LILY POND	4	Yes	Intake	Surface water	Permanent	Active
STATION C	10	No	Pump Facility	-	-	Active
WHITNEY XING INTERCONNECT PUMP STATION	15	No	Pump Facility	-	-	Active
ELLMS MEADOW PUMPING STATION	16	No	Pump Facility	-	-	Active
WASTEWATER BACKWASH PUMP STATION	19	No	Pump Facility	-	-	Active
HIGH SERVICE FINISHED WATER PUMPING STAT	20	No	Pump Facility	-	-	Active
LILY POND STATION A	8	No	Pump Facility	-	-	Active
LILY POND STATION B FINISHED WATER	9	No	Pump Facility	-	-	Active
SCITUATE HILL TANK	17	No	Storage	-	-	Active
LILY POND CLEAR WELL	6	No	Storage	-	-	Active
BEAR HILL STP.	7	No	Storage	-	-	Active
LILY POND WATER TREATMENT PLANT	11	No	Treatment Plant	-	-	Active
SOHIER G.P. WELL # 1 TREATMENT PLANT	12	No	Treatment Plant	-	-	Active
ELLMS MEADOW PUMPING STATION	13	No	Treatment Plant	-	-	Active
SOHIER G.P. WELL #2 TREATMENT PLANT	14	No	Treatment Plant	-	-	Active
WHITNEY CROSSING BOOSTER CHLORINE STATIN	18	No	Treatment Plant	-	-	Active

1 - 20 of 20

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
LILY POND WATER TREATMENT PLANT	11	Gaseous Chlorination, Post	Disinfection
LILY POND WATER TREATMENT PLANT	11	Gaseous Chlorination, Pre	Disinfection
LILY POND WATER TREATMENT PLANT	11	Flocculation	Organics removal
LILY POND WATER TREATMENT PLANT	11	Sedimentation	Organics removal
LILY POND WATER TREATMENT PLANT	11	Fluoridation	Other
LILY POND WATER TREATMENT PLANT	11	Filtered	Particulate removal
LILY POND WATER TREATMENT PLANT	11	Permanganate	Iron removal
LILY POND WATER TREATMENT PLANT	11	Coagulation	Particulate removal
LILY POND WATER TREATMENT PLANT	11	Coagulation	Organics removal
LILY POND WATER TREATMENT PLANT	11	Inhibitor, Polyphosphate	Corrosion control
LILY POND WATER TREATMENT PLANT	11	pH Adjustment	Corrosion control
LILY POND WATER TREATMENT PLANT	11	pH Adjustment, Post	Corrosion control
SOHIER G.P. WELL # 1 TREATMENT PLANT	12	Gaseous Chlorination, Post	Disinfection
ELLMS MEADOW PUMPING STATION	13	Hypochlorination, Post	Disinfection
ELLMS MEADOW PUMPING STATION	13	Fluoridation	Other
ELLMS MEADOW PUMPING STATION	13	4-Log Treatment of Viruses	Disinfection
ELLMS MEADOW PUMPING STATION	13	pH Adjustment	Corrosion control
ELLMS MEADOW PUMPING STATION	13	Inhibitor, Polyphosphate	Corrosion control
SOHIER G.P. WELL #2 TREATMENT PLANT	14	Hypochlorination, Post	Disinfection
SOHIER G.P. WELL #2 TREATMENT PLANT	14	Gaseous Chlorination, Post	Disinfection
WHITNEY CROSSING BOOSTER CHLORINE STATIN	18	Hypochlorination, Post	Disinfection

1 - 21 of 21

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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