Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CT0150011
PWS Name	AQUARION-EASTERN FAIRFIELD COUNTY
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	351756
County Served	Fairfield

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, Regular	Inorganic Chemicals	Antimony, Total	7222	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	7230	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	7240	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	7224	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	7239	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	7214	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	7241	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	7225	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	7218	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	7234	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	7233	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	7217	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	7216	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	7232	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	7215	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	7231	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	7228	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	7212	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	7211	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	7227	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	7226	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	7210	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	7238	Known	01-JAN-2021	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	7223	Known	01-JAN-2021	31-DEC-2023	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	7242	Returned to Compliance	29-SEP-2020	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	7195	Returned to Compliance	01-JAN-2020	30-JUN-2020	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	7194	Known	01-NOV-2018	30-NOV-2018	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	7029	Returned to Compliance	01-JUL-2018	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	7192	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	7191	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	7109	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	7068	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	7150	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	7070	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	7111	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	7193	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	7152	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	7104	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	7145	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	7063	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	7186	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	7165	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	7042	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	7124	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	7083	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	7082	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	7041	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	7123	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	7164	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	7103	Returned to Compliance	01-JAN-2016	31-DEC-2018	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
1111443	7210	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7241	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7212	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7214	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7215	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7216	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7217	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7218	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7222	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7223	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7224	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7225	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7226	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7227	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7228	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7230	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7231	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7232	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7233	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7234	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7238	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7239	SIF	State Public Notification received	01-AUG-2024	State	-
1111442	7240	SIF	State Public Notification received	01-AUG-2024	State	-
1111443	7211	SIF	State Public Notification received	01-AUG-2024	State	-
1111428	7071	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7072	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7073	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7074	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7075	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7076	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7077	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7078	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7079	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7080	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7081	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7082	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7083	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7084	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7085	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7086	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7089	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7090	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7092	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7093	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7094	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7095	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7096	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7098	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7102	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed
1111428	7103	SOX	State Compliance achieved	31-DEC-2021	State	Monitoring Resumed

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTERCONNECTION - CT1030011 - MURRAY	50060	Yes	Consecutive Connection	Surface water	Emergency	Active
WESTPORT WELL #7	28024	Yes	Well	Ground water	Seasonal	Active
WESTPORT WELL #5	27866	Yes	Well	Ground water	Seasonal	Active
WESTPORT WELL #4	27865	Yes	Well	Ground water	Seasonal	Active
WESTPORT WELL #3	27863	Yes	Well	Ground water	Seasonal	Active
WESTPORT WELL #6	27864	Yes	Well	Ground water	Permanent	Inactive
BROOKSIDE WELL 1	27862	Yes	Well	Ground water	Permanent	Inactive
STEPNEY WELL 1	27671	Yes	Well	Ground water	Permanent	Inactive
CANNONDALE WELL 1	27640	Yes	Well	Ground water	Permanent	Inactive
BLUE RIDGE WELL	27356	Yes	Well	Ground water	Permanent	Inactive
COLEYTOWN WELL #2	27868	Yes	Well	Ground water	Permanent	Active
COLEYTOWN WELL #1	27867	Yes	Well	Ground water	Permanent	Active
HOUSATONIC WELL 1	27638	Yes	Well	Ground water	Other	Inactive
HOUSATONIC WELL 5A	27635	Yes	Well	Ground water	Other	Inactive
HOUSATONIC WELL 2	27629	Yes	Well	Ground water	Other	Inactive
HOUSATONIC WELL 5	27625	Yes	Well	Ground water	Other	Inactive
HOUSATONIC WELL 3	27624	Yes	Well	Ground water	Other	Inactive
HOUSATONIC WELL #10	28023	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #9	27639	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #4	27637	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #3A	27636	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #8	27634	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #2A	27628	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #6	27627	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC WELL #7	27626	Yes	Well	Ground water	Emergency	Inactive
HOUSATONIC RIVER DIVERSION	32730	Yes	Reservoir	Surface water	Permanent	Inactive
SHELTON RESERVOIR #3	32520	Yes	Reservoir	Surface water	Permanent	Inactive
SHELTON RESERVOIR #2	32519	Yes	Reservoir	Surface water	Permanent	Inactive
FAR MILL RESERVOIR	32514	Yes	Reservoir	Surface water	Permanent	Active
MEANS BROOK RESERVOIR	32513	Yes	Reservoir	Surface water	Permanent	Active
TRAP FALLS RESERVOIR	32512	Yes	Reservoir	Surface water	Permanent	Active
WEST PEQUONNOCK DIVERSION	32510	Yes	Reservoir	Surface water	Permanent	Active
EASTON LAKE RESERVOIR	32509	Yes	Reservoir	Surface water	Permanent	Active
SAUGATUCK RESERVOIR	32507	Yes	Reservoir	Surface water	Permanent	Active
ASPETUCK RESERVOIR	32506	Yes	Reservoir	Surface water	Permanent	Active
HEMLOCKS RESERVOIR	32505	Yes	Reservoir	Surface water	Permanent	Active
TRAP FALLS RESERVOIR INTAKE	19506	Yes	Intake	Surface water	Permanent	Active
HEMLOCKS RESERVOIR INTAKE	19505	Yes	Intake	Surface water	Permanent	Active
EASTON LAKE RESERVOIR INTAKE	19504	Yes	Intake	Surface water	Permanent	Active
INTERCONNECTION - CT1030011 - ROUTE 7	61391	Yes	Consecutive Connection	Surface water	Emergency	Active
INTERCONNECTION - CT1030011 - SAUGATUCK	61393	Yes	Consecutive Connection	Surface water	Emergency	Active
INTERCONNECTION - CT1030011 - WINFIELD	61396	Yes	Consecutive Connection	Surface water	Emergency	Active
INTERCONNECTION - CT1030011 - COUNTY	50062	Yes	Consecutive Connection	Surface water	Emergency	Inactive
INTERCONNECTION - CT1180011 -BRANCHVILLE	61405	Yes	Consecutive Connection	Surface water	Permanent	Active
INTERCONNECTION - CT1350011 - HOYT	61406	Yes	Consecutive Connection	Surface water	Permanent	Active
INTERCONNECTION - CT1350011 - WESTPORT	61409	Yes	Consecutive Connection	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	19507	No	Distribution System/Zone	-	-	Active
MOREHOUSE BROOK DIVERSION	32508	No	Other	-	-	Active
BOYS HALFWAY RIVER DIVERSION	32511	No	Other	-	-	Active
WILTON ROAD PUMP STATION	49056	No	Pump Facility	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TRAP FALLS WATER TREATMENT PLANT	36219	Filtration, Rapid Sand	Particulate removal
TRAP FALLS WATER TREATMENT PLANT	36219	pH Adjustment, Pre	Particulate removal
TRAP FALLS WATER TREATMENT PLANT	36219	Hypochlorination, Pre	Disinfection
TRAP FALLS WATER TREATMENT PLANT	36219	Coagulation	Particulate removal
TRAP FALLS WATER TREATMENT PLANT	36219	pH Adjustment, Pre	Particulate removal
TRAP FALLS WATER TREATMENT PLANT	36219	Permanganate	Taste / odor control
TRAP FALLS WATER TREATMENT PLANT	36219	Rapid Mix	Particulate removal
TRAP FALLS WATER TREATMENT PLANT	36219	Inhibitor, Orthophosphate	Corrosion control
TRAP FALLS WATER TREATMENT PLANT	36219	pH Adjustment, Post	Corrosion control
TRAP FALLS WATER TREATMENT PLANT	36219	Hypochlorination, Post	Disinfection
TRAP FALLS WATER TREATMENT PLANT	36219	Fluoridation	Other
TRAP FALLS WATER TREATMENT PLANT	36219	Hypochlorination, Pre	Disinfection
TRAP FALLS WATER TREATMENT PLANT	36219	Flocculation	Particulate removal
TRAP FALLS WATER TREATMENT PLANT	36219	Sedimentation	Particulate removal
EASTON WATER TREATMENT PLANT	36220	Filtration, Rapid Sand	Particulate removal
EASTON WATER TREATMENT PLANT	36220	Flocculation	Particulate removal
EASTON WATER TREATMENT PLANT	36220	Sedimentation	Particulate removal
EASTON WATER TREATMENT PLANT	36220	Hypochlorination, Pre	Disinfection
EASTON WATER TREATMENT PLANT	36220	Permanganate	Taste / odor control
EASTON WATER TREATMENT PLANT	36220	pH Adjustment, Pre	Particulate removal
EASTON WATER TREATMENT PLANT	36220	Hypochlorination, Pre	Disinfection
EASTON WATER TREATMENT PLANT	36220	Coagulation	Particulate removal
EASTON WATER TREATMENT PLANT	36220	pH Adjustment, Pre	Particulate removal
EASTON WATER TREATMENT PLANT	36220	Inhibitor, Polyphosphate	Corrosion control
EASTON WATER TREATMENT PLANT	36220	pH Adjustment, Post	Corrosion control
EASTON WATER TREATMENT PLANT	36220	Hypochlorination, Post	Disinfection
EASTON WATER TREATMENT PLANT	36220	Fluoridation	Other
EASTON WATER TREATMENT PLANT	36220	Hypochlorination, Pre	Disinfection
EASTON WATER TREATMENT PLANT	36220	Rapid Mix	Particulate removal
WESTPORT WELLFIELD TREATMENT PLANT	36221	Inhibitor, Orthophosphate	Corrosion control
WESTPORT WELLFIELD TREATMENT PLANT	36221	pH Adjustment, Post	Corrosion control
WESTPORT WELLFIELD TREATMENT PLANT	36221	Fluoridation	Other
WESTPORT WELLFIELD TREATMENT PLANT	36221	Hypochlorination, Post	Disinfection
WESTPORT WELLFIELD TREATMENT PLANT	36221	4-Log Treatment of Viruses	Disinfection
COLEYTOWN WELLFIELD TREATMENT PLANT	36222	Inhibitor, Orthophosphate	Corrosion control
COLEYTOWN WELLFIELD TREATMENT PLANT	36222	pH Adjustment, Post	Corrosion control
COLEYTOWN WELLFIELD TREATMENT PLANT	36222	Fluoridation	Other
COLEYTOWN WELLFIELD TREATMENT PLANT	36222	4-Log Treatment of Viruses	Disinfection
COLEYTOWN WELLFIELD TREATMENT PLANT	36222	Hypochlorination, Post	Disinfection
HOUSATONIC WELLFIELD TREATMENT PLANT	36225	Hypochlorination, Post	Disinfection
HOUSATONIC WELLFIELD TREATMENT PLANT	36225	Inhibitor, Orthophosphate	Corrosion control
HOUSATONIC WELLFIELD TREATMENT PLANT	36225	pH Adjustment, Post	Corrosion control
HOUSATONIC WELLFIELD TREATMENT PLANT	36225	Fluoridation	Other
HEMLOCKS WATER TREATMENT PLANT	36226	Filtration, Rapid Sand	Particulate removal
HEMLOCKS WATER TREATMENT PLANT	36226	Flocculation	Particulate removal
HEMLOCKS WATER TREATMENT PLANT	36226	Sedimentation	Particulate removal
HEMLOCKS WATER TREATMENT PLANT	36226	Hypochlorination, Pre	Disinfection
HEMLOCKS WATER TREATMENT PLANT	36226	pH Adjustment, Pre	Particulate removal
HEMLOCKS WATER TREATMENT PLANT	36226	Hypochlorination, Pre	Disinfection
HEMLOCKS WATER TREATMENT PLANT	36226	Coagulation	Particulate removal

1 - 50 of 58

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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