Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	NC0392373
PWS Name	BAYLEAF MASTER
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	16715
County Served	Wake

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	Volatile Organic Chemicals	Xylenes, Total	3663232	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	3663231	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	3663250	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	3663249	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	3663248	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	3663247	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	3663230	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	3663233	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	3663234	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	3663235	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	3663236	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	3663237	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	3663238	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	3663239	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	3663240	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	3663241	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	3663242	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	3663243	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	3663244	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	3663245	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	3663246	Known	01-APR-2026	30-JUN-2026	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	3663225	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	3663227	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	3663228	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	3663229	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	3663226	Returned to Compliance	01-APR-2025	30-JUN-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	3663223	Returned to Compliance	01-JUL-2024	30-SEP-2024	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	3663224	Returned to Compliance	01-JUL-2024	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3663222	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3663221	Known	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	3663220	Returned to Compliance	01-OCT-2020	31-DEC-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	3663208	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	3663207	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	3663206	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	3663205	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	3663204	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	3663203	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	3663202	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	3663201	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	3663200	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	3663198	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	3663197	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	3663196	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	3663195	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	3663194	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	3663218	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	3663215	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	3663214	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	3663213	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	3663212	Returned to Compliance	01-APR-2020	30-JUN-2020	No

1 - 50 of 150

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
2518735	3663241	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663231	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663250	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663249	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663248	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663247	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663246	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663245	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663244	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663243	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663242	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663230	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663240	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663239	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663238	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663237	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663236	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663235	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663234	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663233	SIE	State Public Notification requested	06-AUG-2026	State	-
2518735	3663232	SIE	State Public Notification requested	06-AUG-2026	State	-
2518726	3663223	SIF	State Public Notification received	22-OCT-2025	State	Created by eCERT
2518725	3663225	SIF	State Public Notification received	22-OCT-2025	State	Created by eCERT
2518727	3663228	SOX	State Compliance achieved	23-SEP-2025	State	-
2518727	3663229	SOX	State Compliance achieved	23-SEP-2025	State	-
2518727	3663227	SOX	State Compliance achieved	23-SEP-2025	State	-
2518727	3663226	SOX	State Compliance achieved	23-SEP-2025	State	-
2518721	3663224	SOX	State Compliance achieved	11-DEC-2024	State	-
2518712	3663221	SIF	State Public Notification received	22-MAY-2024	State	Created by eCERT
2518711	3663222	SIF	State Public Notification received	22-MAY-2024	State	Created by eCERT
2518702	3663194	SIF	State Public Notification received	26-JUN-2021	State	Created by eCERT
2518701	3663220	SO0	State no longer subject to Rule	04-FEB-2021	State	-
2518697	3663210	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663209	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663208	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663207	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663206	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663205	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663204	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663203	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663202	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663201	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663200	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663199	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663198	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663197	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663196	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663195	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663216	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-
2518697	3663217	SFO	State Administrative/Compliance Order with penalty issued	30-OCT-2020	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
MARTINDALE #2	30665	Yes	Well	Ground water	Emergency	Inactive
WOODVALLEY_WELL #11	70560	Yes	Well	Ground water	Permanent	Inactive
HAWTHORNE_WELL #2	70550	Yes	Well	Ground water	Permanent	Inactive
HAWTHORNE_WELL #1	70549	Yes	Well	Ground water	Permanent	Inactive
RAVENWOOD_WELL #2B	70510	Yes	Well	Ground water	Permanent	Inactive
RAVENWOOD_WELL #2A	70509	Yes	Well	Ground water	Permanent	Inactive
STONECREEK #10	30686	Yes	Well	Ground water	Permanent	Inactive
STONEBRIDGE #1	30680	Yes	Well	Ground water	Permanent	Inactive
SHEFFIELD #4	30677	Yes	Well	Ground water	Permanent	Inactive
SHANNON WOODS #1	30672	Yes	Well	Ground water	Permanent	Inactive
MARTINDALE #1	30664	Yes	Well	Ground water	Permanent	Inactive
DEVON WELL #2	30658	Yes	Well	Ground water	Permanent	Inactive
CARLYLE MANOR #4	30645	Yes	Well	Ground water	Permanent	Inactive
BRIXLEY WELL #2	80005	Yes	Well	Ground water	Permanent	Active
SHADOW CREEK #1	79156	Yes	Well	Ground water	Permanent	Active
WOOD VALLEY WELL #14	78757	Yes	Well	Ground water	Permanent	Active
SHADOW CREEK #3	78401	Yes	Well	Ground water	Permanent	Active
PAP WELL #3	78141	Yes	Well	Ground water	Permanent	Active
PAP WELL #2	78140	Yes	Well	Ground water	Permanent	Active
PF NORTH WELL	78139	Yes	Well	Ground water	Permanent	Active
GLENS OF MACTAVISH WELL	78138	Yes	Well	Ground water	Permanent	Active
PF WELL #1	78137	Yes	Well	Ground water	Permanent	Active
MV WELL #5	78136	Yes	Well	Ground water	Permanent	Active
MV WELL #4	78135	Yes	Well	Ground water	Permanent	Active
MV WELL #2	78134	Yes	Well	Ground water	Permanent	Active
THE RESERVE_WELL #3	77044	Yes	Well	Ground water	Permanent	Active
SHANNON WOODS #4	76982	Yes	Well	Ground water	Permanent	Active
SOUTHERN HILL WELL 2	76765	Yes	Well	Ground water	Permanent	Active
AVALAIRE WELL 8	76516	Yes	Well	Ground water	Permanent	Active
COACHMAN WELL 4B	75151	Yes	Well	Ground water	Permanent	Active
CREEDMOOR VILLAGE WELL #1	74272	Yes	Well	Ground water	Permanent	Active
BRINLEYS COVE WELL #1	74175	Yes	Well	Ground water	Permanent	Active
CARLYLE MANOR WELL #7	74173	Yes	Well	Ground water	Permanent	Active
GEORGE'S GRANT WELL #2	73603	Yes	Well	Ground water	Permanent	Active
GEORGE'S GRANT WELL #1	73325	Yes	Well	Ground water	Permanent	Active
NORMANDY GLEN WELL #1	72669	Yes	Well	Ground water	Permanent	Active
SEVILLE WELL #1	72164	Yes	Well	Ground water	Permanent	Active
CARLYLE MANOR #4A	72137	Yes	Well	Ground water	Permanent	Active
BYRUM WOODS_WELL #2A	72135	Yes	Well	Ground water	Permanent	Active
STILL CREEK #6	71394	Yes	Well	Ground water	Permanent	Active
DEVON WELL #3	71002	Yes	Well	Ground water	Permanent	Active
BARTON CRK BLUFFS WELL #14	71000	Yes	Well	Ground water	Permanent	Active
ROSEHALL WELL #2	70998	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #9	70570	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #8	70569	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #7	70568	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #6	70567	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #5	70566	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #4	70565	Yes	Well	Ground water	Permanent	Active
WOODVALLEY_WELL #2	70564	Yes	Well	Ground water	Permanent	Active

1 - 50 of 330

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT_PLT_STONECREEK #18	10212	Filtration, Greensand	Iron removal
TREATMENT_PLT_STONECREEK #18	10212	Filtration, Greensand	Manganese removal
TREATMENT_PLT_STONECREEK #18	10212	Hypochlorination, Post	Disinfection
TREATMENT_PLT_HERITAGE POINT #1	10442	Hypochlorination, Post	Disinfection
TREATMENT_PLT_HERITAGE POINT #1	10442	Sequestration	Manganese removal
TREATMENT_PLT_MARTINDALE #3	10443	Filtration, Greensand	Iron removal
TREATMENT_PLT_MARTINDALE #3	10443	Filtration, Greensand	Manganese removal
TREATMENT_PLT_MARTINDALE #3	10443	pH Adjustment	Corrosion control
TREATMENT_PLT_MARTINDALE #3	10443	Hypochlorination, Post	Disinfection
TREATMENT_PLT_MARTINDALE #3	10443	Sequestration	Iron removal
TREATMENT_PLT_CROSSGATE #1	10444	pH Adjustment	Corrosion control
TREATMENT_PLT_CROSSGATE #1	10444	Hypochlorination, Post	Disinfection
TREATMENT_PLT_CROSSGATE #1	10444	Sequestration	Iron removal
TREATMENT_PLT_HUNTERS LANDING #2	10445	Hypochlorination, Post	Disinfection
TREATMENT_PLT_HUNTERS LANDING #2	10445	Sequestration	Iron removal
TREATMENT_PLT_HUNTERS LANDING #3	10446	Hypochlorination, Post	Disinfection
TREATMENT_PLT_MARTINDALE #2	10447	Hypochlorination, Post	Disinfection
TREATMENT_PLT_MARTINDALE #2	10447	Sequestration	Iron removal
TREATMENT_PLT_CARLYLE MANOR #1	10448	Hypochlorination, Pre	Disinfection
TREATMENT_PLT_CARLYLE MANOR #1	10448	Filtration, Greensand	Manganese removal
TREATMENT_PLT_CARLYLE MANOR #1	10448	Filtration, Greensand	Iron removal
TREATMENT_PLT_CARLYLE MANOR #1	10448	pH Adjustment	Corrosion control
TREATMENT_PLT_CARLYLE MANOR #1	10448	Sequestration	Manganese removal
TREATMENT_PLT_CHATSWORTH #2	10449	Hypochlorination, Post	Disinfection
TREATMENT_PLT_CHATSWORTH #2	10449	Sequestration	Manganese removal
TREATMENT_PLT_CHATSWORTH #5	10450	Hypochlorination, Post	Disinfection
TREATMENT_PLT_CHATSWORTH #5	10450	Sequestration	Manganese removal
TREATMENT_PLT_CHATSWORTH #6	10451	Sequestration	Manganese removal
TREATMENT_PLT_CHATSWORTH #6	10451	pH Adjustment	Corrosion control
TREATMENT_PLT_CHATSWORTH #6	10451	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHANNON WOODS #3	10452	Filtration, Greensand	Iron removal
TREATMENT_PLT_SHANNON WOODS #3	10452	Filtration, Greensand	Manganese removal
TREATMENT_PLT_SHANNON WOODS #3	10452	Ion Exchange	Radionuclides removal
TREATMENT_PLT_SHANNON WOODS #3	10452	Hypochlorination, Pre	Disinfection
TREATMENT_PLT_SWANS MILL #4	10453	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHEFFIELD PLACE #9	10454	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHEFFIELD PLACE #9	10454	Sequestration	Manganese removal
TREATMENT_PLT_SHEFFIELD MANOR #7	10455	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHEFFIELD #4	10456	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHEFFIELD #4	10456	Sequestration	Iron removal
TREATMENT_PLT_SHEFFIELD #3	10457	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHEFFIELD #3	10457	Sequestration	Iron removal
TREATMENT_PLT_SHEFFIELD #2	10458	pH Adjustment	Corrosion control
TREATMENT_PLT_SHEFFIELD #2	10458	Hypochlorination, Post	Disinfection
TREATMENT_PLT_SHEFFIELD #2	10458	Sequestration	Iron removal
TREATMENT_PLT_SHEFFIELD #1	10459	pH Adjustment	Corrosion control
TREATMENT_PLT_SHEFFIELD #1	10459	Hypochlorination, Post	Disinfection
TREATMENT_PLT_STONEBRIDGE #14	10460	Hypochlorination, Post	Disinfection
TREATMENT_PLT_DEVON #1	10461	Hypochlorination, Post	Disinfection
TREATMENT_PLT_DEVON #3	10462	Hypochlorination, Post	Disinfection

1 - 50 of 343

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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