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PWS ID	NN0403006
PWS Name	LeChee NTUA
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Surface water purchased
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	1115
County Served

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	040300602295042024	Returned to Compliance	01-APR-2024	30-JUN-2024	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040300675750042024	Open	01-APR-2024	-	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040300630245642015	Returned to Compliance	01-APR-2015	30-JUN-2015	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	040300630295042015	Returned to Compliance	01-APR-2015	30-JUN-2015	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	0403006302950102014	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	0403006302456102014	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	040300630295042014	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	040300630245642014	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	Stage 2 Disinfectants and Disinfection Byproducts Rule	0403006350600102013	Returned to Compliance	01-OCT-2013	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	0403006233100122012	Returned to Compliance	01-DEC-2012	31-DEC-2012	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	0403006233100112012	Returned to Compliance	01-NOV-2012	30-NOV-2012	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	040300622310022010	Returned to Compliance	01-FEB-2010	28-FEB-2010	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrite	040300603104112010	Returned to Compliance	01-JAN-2010	31-DEC-2010	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	040300603104012010	Returned to Compliance	01-JAN-2010	31-DEC-2010	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	040300603100512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	040300603102012008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	040300603101512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	040300603238312008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	040300603210512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	040300603211012008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	040300603102412008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	040300603102512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	040300603103512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	040300603104512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	040300603227412008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	040300603230612008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	040300603232612008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	040300603237812008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	040300603238012008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	040300603295512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	040300603295912008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	040300603296412008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	040300603296812008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	040300603296912008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	040300603297612008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	040300603297712008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	040300603297912008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	040300603298012008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	040300603298112008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	040300603298212008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	040300603298312008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	040300603298412008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	040300603298512008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	040300603298712008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	040300603298912008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	040300603299012008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	040300603299112008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	040300603299212008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	040300603299612008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	040300603293112008	Returned to Compliance	01-JAN-2008	31-DEC-2010	No

1 - 50 of 78

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
0403006FJ03072541980	040300675750042024	SFJ	State Formal Notice of Violation issued	07-MAR-2025	State	NOV issued for failure to prepare and post a Tier 2 PN for TTHM exceedance.
0403006OX03062543256	0403006350600102013	SOX	State Compliance achieved	06-MAR-2025	State	RTC, DBP site sampling plan was received on 3/3/2025 and approved on 3/6/25.
0403006FJ08282441412	040300602295042024	SFJ	State Formal Notice of Violation issued	28-AUG-2024	State	NOV issued for exceeding the TTHM-RAA during the quarter April to June 2024. PN-Tier 2 required.
0403006OX05111531475	040300630295042015	SOX	State Compliance achieved	11-MAY-2015	State	RTC, sample results received.
0403006OX05111531476	040300630245642015	SOX	State Compliance achieved	11-MAY-2015	State	RTC, sample results received.
0403006IE03051530560	0403006302456102014	SIE	State Public Notification requested	05-MAR-2015	State	NOV, PN required.
0403006IE03051530559	0403006302950102014	SIE	State Public Notification requested	05-MAR-2015	State	NOV, PN required.
0403006IE08281428612	040300630295042014	SIE	State Public Notification requested	28-AUG-2014	State	NOV issued for failure to prepare and post public notice.
0403006IE08281428613	040300630245642014	SIE	State Public Notification requested	28-AUG-2014	State	NOV issued for failure to prepare and post public notice.
0403006OX01111323583	0403006233100122012	SOX	State Compliance achieved	11-JAN-2013	State	2012 Dec TCR M/R. RTC, received NTUA TCR results on 01-11-2013.
0403006OX12111223665	0403006233100112012	SOX	State Compliance achieved	11-DEC-2012	State	2012 Nov TCR M/R. RTC, received NTUA TCR results on 12-11-2012.
0403006OX02131217414	040300603100512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217415	040300603101012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217416	040300603101512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217417	040300603102012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217424	040300603102412008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217418	040300603102512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217419	040300603103512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217420	040300603104012010	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217421	040300603104512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217422	040300603107412008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217423	040300603107512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217425	040300603108512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217406	040300603200512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217456	040300603201012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217457	040300603201512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217460	040300603202012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217463	040300603203112008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217467	040300603203212008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217468	040300603203312008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217407	040300603203412008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217464	040300603203512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217410	040300603203612008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217412	040300603203712008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217465	040300603203912008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217411	040300603204012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217466	040300603204112008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217409	040300603204212008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217449	040300603204612008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217448	040300603205012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217447	040300603205112008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217413	040300603206312008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217454	040300603206512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217455	040300603206712008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217452	040300603210512008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217461	040300603211012008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217408	040300603227412008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217462	040300603230612008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217459	040300603232612008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006
0403006OX02131217445	040300603237812008	SOX	State Compliance achieved	13-FEB-2012	State	RTC. NTUA LeChee PWS is a consecutive system off of the City of Page PWS, PWSID AZ0403017. City of Page is responsible for all source water monitoring. DGene NN0403006

1 - 50 of 78

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
AZ0403017 City of Page AZ_Lake Powell	0403006SW001	Yes	Consecutive Connection	Surface water	Permanent	Active
SW001 Entry Point	0403006EP001	No	Common Headers	-	-	Active
NN0403006 LeChee Main Distribution System	0403006DS001	No	Distribution System/Zone	-	-	Active
NN0403006 LeChee South Distribution System	0403006DS002	No	Distribution System/Zone	-	-	Active
0403006 Booster Station #1	0403006PF001	No	Pump Facility	-	-	Active
0403006 Booster Station #2	0403006PF002	No	Pump Facility	-	-	Active
LeChee 1 (North Small)Tank	0403006ST002	No	Storage	-	-	Active
LeChee 2 (Large South) Tank	0403006ST003	No	Storage	-	-	Active
LeChee South (Hamburger Hill) Tank	0403006ST004	No	Storage	-	-	Active
0403006 LeChee Booster Standpipe	0403006ST001	No	Storage	-	-	Inactive

1 - 10 of 10

Treatment Processes

No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.

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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