Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CT0473011
PWS Name	CTWC - NORTHERN REG-WESTERN SYSTEM
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	101313
County Served	Hartford

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	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	97084	Returned to Compliance	14-DEC-2024	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	97038	Open	08-JUN-2018	-	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	96866	Returned to Compliance	16-JUL-2014	-	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	96867	Returned to Compliance	01-JUL-2014	31-JUL-2014	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	97031	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	97034	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	97029	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	97028	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	97026	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	97024	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	97023	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	97022	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	97021	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	97020	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	97019	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	97018	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	97016	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	97015	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	97014	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	97013	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	97009	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	96994	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	96993	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	96987	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	96986	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	97030	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	96985	Returned to Compliance	01-JAN-2014	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	96847	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	96848	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	96846	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	92909	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	92509	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	92209	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	92109	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	92009	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	91909	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	91709	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	91509	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	91409	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	91309	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	91209	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	91109	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	91009	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	90909	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	90709	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	90609	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	90509	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	90409	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	90009	Returned to Compliance	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	88509	Returned to Compliance	01-JUL-2008	30-SEP-2008	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
6430	97084	SOX	State Compliance achieved	14-DEC-2024	State	-
6427	97038	SIA	State Violation/Reminder Notice	26-AUG-2019	State	-
6424	96985	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97034	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	96987	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	96993	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	96994	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97009	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97013	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97014	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97015	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97016	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97018	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97019	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97020	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97021	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97022	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97023	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97024	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97026	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97028	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97029	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97030	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	97031	SIE	State Public Notification requested	07-JUN-2017	State	-
6424	96986	SIE	State Public Notification requested	07-JUN-2017	State	-
6422	96866	SOX	State Compliance achieved	03-DEC-2014	State	-
6417	96867	SOX	State Compliance achieved	18-NOV-2014	State	-
6413	96846	SIA	State Violation/Reminder Notice	22-JAN-2013	State	-
6413	96848	SIA	State Violation/Reminder Notice	22-JAN-2013	State	-
6413	96847	SIA	State Violation/Reminder Notice	22-JAN-2013	State	-
6409	96609	SIA	State Violation/Reminder Notice	12-MAR-2009	State	-
6109	93609	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	93809	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	93909	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94009	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94109	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94209	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94609	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94709	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94809	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	94909	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95009	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95109	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95209	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95409	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95509	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95609	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95709	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	95809	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-
6109	96209	SIA	State Violation/Reminder Notice	09-MAR-2009	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTERCONNECTION - CT0770021 - PINE TREE	54660	Yes	Consecutive Connection	Surface water	Emergency	Active
VERNON WELL 6	27753	Yes	Well	Ground water	Seasonal	Inactive
VERNON WELL 4	27751	Yes	Well	Ground water	Seasonal	Inactive
VERNON WELL 2	27750	Yes	Well	Ground water	Seasonal	Inactive
VERNON WELL 1	27749	Yes	Well	Ground water	Seasonal	Inactive
WINDSOR LOCKS CAISSON WELL 4	27703	Yes	Well	Ground water	Seasonal	Inactive
WINDSOR LOCKS CAISSON WELL 3	27702	Yes	Well	Ground water	Seasonal	Inactive
WINDSOR LOCKS CAISSON WELL 2	27701	Yes	Well	Ground water	Seasonal	Inactive
WINDSOR LOCKS CAISSON WELL 1	27700	Yes	Well	Ground water	Seasonal	Inactive
TORRY ROAD WELL 3	26655	Yes	Well	Ground water	Seasonal	Inactive
ELLSWORTH WELL 3	26531	Yes	Well	Ground water	Seasonal	Inactive
MAPLETON AVE WELL 1	26474	Yes	Well	Ground water	Seasonal	Inactive
MAPLETON AVE WELL 2	26473	Yes	Well	Ground water	Seasonal	Inactive
O'BREADY WELL	27704	Yes	Well	Ground water	Seasonal	Active
WOODLAND PARK WELL	26632	Yes	Well	Ground water	Seasonal	Active
WEST SUFFIELD WELL	26507	Yes	Well	Ground water	Seasonal	Active
ROLLING HILLS WELL 3	60376	Yes	Well	Ground water	Permanent	Inactive
ROLLING HILLS WELL 5	60375	Yes	Well	Ground water	Permanent	Inactive
PRESTON WELL 2	57443	Yes	Well	Ground water	Permanent	Inactive
PRESTON WELL 1	57442	Yes	Well	Ground water	Permanent	Inactive
PRESTON WELL #1	56752	Yes	Well	Ground water	Permanent	Inactive
ELLINGTON ACRES WELL #4	56750	Yes	Well	Ground water	Permanent	Inactive
ELLINGTON ACRES WELL #3	56749	Yes	Well	Ground water	Permanent	Inactive
ELLINGTON ACRES WELL #2	56748	Yes	Well	Ground water	Permanent	Inactive
ELLINGTON ACRES WELL #1	56635	Yes	Well	Ground water	Permanent	Inactive
TORRY ROAD WELL 4	36840	Yes	Well	Ground water	Permanent	Inactive
POWDER HOLLOW WELL 2	27706	Yes	Well	Ground water	Permanent	Inactive
POWDER HOLLOW WELL 5	59714	Yes	Well	Ground water	Permanent	Active
SPRING LOTS WELL 9	54962	Yes	Well	Ground water	Permanent	Active
SPRING LOTS WELL 8	52906	Yes	Well	Ground water	Permanent	Active
SPRING LOTS WELL 7	47836	Yes	Well	Ground water	Permanent	Active
SPRING LOTS WELL 3	46345	Yes	Well	Ground water	Permanent	Active
HUNT WELL 10	45686	Yes	Well	Ground water	Permanent	Active
POWDER HOLLOW WELL 4	45685	Yes	Well	Ground water	Permanent	Active
HUNT WELL 9	27717	Yes	Well	Ground water	Permanent	Active
HUNT WELL 8	27716	Yes	Well	Ground water	Permanent	Active
HUNT WELL 6	27714	Yes	Well	Ground water	Permanent	Active
HUNT WELL 5	27713	Yes	Well	Ground water	Permanent	Active
POWDER HOLLOW WELL 1	27705	Yes	Well	Ground water	Permanent	Active
SPRING LOTS WELL 5	27684	Yes	Well	Ground water	Permanent	Active
VERNON WELL 5	26640	Yes	Well	Ground water	Permanent	Active
PINE KNOB WELL	26631	Yes	Well	Ground water	Permanent	Active
POWDER HILL WELL #3	46529	Yes	Well	Ground water	Other	Inactive
TALCOTTVILLE WELL 1	27744	Yes	Well	Ground water	Other	Inactive
KUPCHUNOS WELL FIELD	27743	Yes	Well	Ground water	Other	Inactive
HUNT WELL 4	27712	Yes	Well	Ground water	Other	Inactive
SPRING LOTS WELL 1	27686	Yes	Well	Ground water	Other	Inactive
SPRING LOTS WELL 6	27685	Yes	Well	Ground water	Other	Inactive
SPRING LOTS WELL 4	27683	Yes	Well	Ground water	Other	Inactive
FARNHAM ESTATES WELL	26629	Yes	Well	Ground water	Other	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
HUNT WATER TREATMENT PLANT	36290	Fluoridation	Other
HUNT WATER TREATMENT PLANT	36290	Filtration, Pressure Sand	Iron removal
HUNT WATER TREATMENT PLANT	36290	Filtration, Pressure Sand	Manganese removal
HUNT WATER TREATMENT PLANT	36290	Inhibitor, Hexametaphosphate	Corrosion control
HUNT WATER TREATMENT PLANT	36290	Hypochlorination, Post	Disinfection
HUNT WATER TREATMENT PLANT	36290	Filtration, Greensand	Iron removal
HUNT WATER TREATMENT PLANT	36290	Filtration, Greensand	Manganese removal
VERNON WELL 1	36291	pH Adjustment	Corrosion control
VERNON WELL 1	36291	Fluoridation	Other
VERNON WELL 2	36292	Fluoridation	Other
VERNON WELL 2	36292	pH Adjustment	Corrosion control
POWDER HOLLOW WELLS	36293	Fluoridation	Other
POWDER HOLLOW WELLS	36293	Hypochlorination, Pre	Disinfection
MAPLETON STATION	36294	Fluoridation	Other
MAPLETON STATION	36294	Hypochlorination, Post	Disinfection
WINDSOR LOCKS PUMP STATION	36295	Fluoridation	Other
WINDSOR LOCKS PUMP STATION	36295	Activated Carbon, Granular	Organics removal
WINDSOR LOCKS PUMP STATION	36295	Hypochlorination, Post	Disinfection
SPRING LOTS TREATMENT PLANT	36296	Fluoridation	Other
SPRING LOTS TREATMENT PLANT	36296	Hypochlorination, Post	Disinfection
THOMPSONVILLE PUMP STATION	36297	Fluoridation	Other
THOMPSONVILLE PUMP STATION	36297	Hypochlorination, Post	Disinfection
OLD ROCKVILLE WATER TREATMENT PLANT	36298	Gaseous Chlorination, Post	Disinfection
OLD ROCKVILLE WATER TREATMENT PLANT	36298	Inhibitor, Hexametaphosphate	Corrosion control
OLD ROCKVILLE WATER TREATMENT PLANT	36298	pH Adjustment	Corrosion control
OLD ROCKVILLE WATER TREATMENT PLANT	36298	Fluoridation	Other
OLD ROCKVILLE WATER TREATMENT PLANT	36298	Flocculation	Particulate removal
OLD ROCKVILLE WATER TREATMENT PLANT	36298	Sedimentation	Particulate removal
OLD ROCKVILLE WATER TREATMENT PLANT	36298	Filtered	Particulate removal
VERNON WELL 4	46157	Fluoridation	Other
VERNON WELL 4	46157	pH Adjustment	Corrosion control
VERNON WELL 5	46158	Fluoridation	Other
VERNON WELL 5	46158	Hypochlorination, Post	Disinfection
O'BREADY WELL TREATMENT PLANT	46159	Activated Carbon, Granular	Organics removal
O'BREADY WELL TREATMENT PLANT	46159	Fluoridation	Other
O'BREADY WELL TREATMENT PLANT	46159	Hypochlorination, Post	Disinfection
WOODLAND PARK WELL TP	46160	Fluoridation	Other
PINE KNOB WELL TP	46162	Fluoridation	Other
PINE KNOB WELL TP	46162	Hypochlorination, Post	Disinfection
TORRY ROAD WELL 3 TP	46163	pH Adjustment	Corrosion control
TORRY ROAD WELL 3 TP	46163	Fluoridation	Other
TORRY ROAD WELL 3 TP	46163	Hypochlorination, Post	Disinfection
ELLINGTON ACRES TREATMENT PLANT	56460	Fluoridation	Other
ELLINGTON ACRES TREATMENT PLANT	56460	Hypochlorination, Post	Disinfection
PRESTON WELL #1 TREATMENT PLANT	57444	Hypochlorination, Post	Disinfection
PRESTON WELL #1 TREATMENT PLANT	57444	pH Adjustment	Corrosion control
PRESTON WELL #1 TREATMENT PLANT	57444	Fluoridation	Other
ROCKVILLE WATER TREATMENT PLANT	60577	pH Adjustment	Corrosion control
ROCKVILLE WATER TREATMENT PLANT	60577	Inhibitor, Hexametaphosphate	Corrosion control
ROCKVILLE WATER TREATMENT PLANT	60577	Fluoridation	Other

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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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