Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA3910015
PWS Name	CITY OF LATHROP
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	35080
County Served	San Joaquin

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 and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	9610029	Returned to Compliance	01-JUL-2018	30-SEP-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	9610028	Returned to Compliance	01-JUL-2018	30-SEP-2018	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610026	Returned to Compliance	01-APR-2014	30-JUN-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610025	Returned to Compliance	01-APR-2014	30-JUN-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610024	Returned to Compliance	01-JAN-2014	31-MAR-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610023	Returned to Compliance	01-JAN-2014	31-MAR-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610022	Returned to Compliance	01-OCT-2013	31-DEC-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610021	Returned to Compliance	01-OCT-2013	31-DEC-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610020	Returned to Compliance	01-JUL-2013	30-SEP-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610019	Returned to Compliance	01-JUL-2013	30-SEP-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610018	Returned to Compliance	01-APR-2013	30-JUN-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610017	Returned to Compliance	01-APR-2013	30-JUN-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610015	Returned to Compliance	01-JAN-2013	31-MAR-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610016	Returned to Compliance	01-JAN-2013	31-MAR-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610014	Returned to Compliance	01-OCT-2012	31-DEC-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	9610011	Returned to Compliance	01-JUL-2012	30-SEP-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610010	Returned to Compliance	01-JUL-2012	30-SEP-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610013	Returned to Compliance	01-APR-2012	30-JUN-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	9610012	Returned to Compliance	01-JAN-2012	31-MAR-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1210032	Returned to Compliance	01-OCT-2011	31-DEC-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1110030	Returned to Compliance	01-JUL-2011	30-SEP-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1110031	Returned to Compliance	01-APR-2011	30-JUN-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1110029	Returned to Compliance	01-JAN-2011	31-MAR-2011	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1110028	Returned to Compliance	01-OCT-2010	31-DEC-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1010027	Returned to Compliance	01-JUL-2010	30-SEP-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1010026	Returned to Compliance	01-APR-2010	30-JUN-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1010025	Returned to Compliance	01-JAN-2010	31-MAR-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	1010024	Returned to Compliance	01-OCT-2009	31-DEC-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	910023	Returned to Compliance	01-JUL-2009	30-SEP-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	910022	Returned to Compliance	01-APR-2009	30-JUN-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	910021	Returned to Compliance	01-JAN-2009	31-MAR-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	910020	Returned to Compliance	01-OCT-2008	31-DEC-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	810019	Returned to Compliance	01-JUL-2008	30-SEP-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	810017	Returned to Compliance	01-APR-2008	30-JUN-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	810016	Returned to Compliance	01-JAN-2008	31-MAR-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	810015	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	710014	Returned to Compliance	01-JUL-2007	30-SEP-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	710013	Returned to Compliance	01-APR-2007	30-JUN-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	710012	Returned to Compliance	01-JAN-2007	31-MAR-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Arsenic Rule	Arsenic	610011	Returned to Compliance	01-OCT-2006	31-DEC-2006	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	610010	Returned to Compliance	01-OCT-2005	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9610009	Returned to Compliance	01-JUN-1996	30-JUN-1996	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9610007	Returned to Compliance	01-APR-1996	30-APR-1996	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9610008	Returned to Compliance	01-MAR-1996	31-MAR-1996	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9410004	Returned to Compliance	01-OCT-1993	31-OCT-1993	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9410006	Returned to Compliance	01-OCT-1993	31-OCT-1993	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9310003	Returned to Compliance	01-SEP-1993	30-SEP-1993	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	9310001	Returned to Compliance	01-MAY-1993	31-MAY-1993	No
Other	Notification, Public	Miscellaneous Other Rules	-	8800142	Known	01-OCT-1987	31-OCT-1987	No
Other	Notification, Public	Miscellaneous Other Rules	-	8501109	Known	01-AUG-1985	31-AUG-1985	No

1 - 50 of 50

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
9910022	9610028	SOX	State Compliance achieved	22-DEC-2022	State	compliance have been achieved
9910022	9610029	SOX	State Compliance achieved	22-DEC-2022	State	compliance have been achieved
9910016	1010027	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610026	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610025	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610024	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610023	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610022	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610021	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610020	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	610011	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	710012	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	710013	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	710014	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	810015	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	810016	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	810017	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	810019	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	910020	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	910021	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	910022	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	910023	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1010024	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1010025	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1010026	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1110028	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1110029	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1110030	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1110031	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	1210032	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610010	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610011	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610012	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610013	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610014	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610015	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610016	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610017	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610018	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
9910016	9610019	SOX	State Compliance achieved	05-DEC-2014	State	Achieved compliance with arsenic and uranium MCLs(CO numbers 03-10-08CO-002 issued on 12/26/2008 and 03-10-12CO-003 issued on 10/24/2012)
810026	610010	SOX	State Compliance achieved	03-MAR-2006	State	ENF_NO:03-10-06C-005; RETURN TO COMPLIANCE. DIRECTIVES
9610009	9610009	SFL	State Administrative/Compliance Order without penalty issued	17-JUL-1996	State	ENF_NO:03-10-96CO-002; COMP ORDER, 3RD TCR FAILURE INITIATE CONTINUOUS CHLORINATION
9610008	9610007	SOX	State Compliance achieved	07-MAY-1996	State	CITY GAVE 1 NOTIF. FOR MAR & A PRIL
9610007	9610008	SOX	State Compliance achieved	01-APR-1996	State	ENF_NO:9610005; CITY GAVE REQUIRED NOTIFICATIO N
9510004	9310001	SOX	State Compliance achieved	01-JAN-1995	State	RETURNED TO COMPLIANCE
9510004	9410006	SOX	State Compliance achieved	01-JAN-1995	State	RETURNED TO COMPLIANCE
9510004	9410004	SOX	State Compliance achieved	01-JAN-1995	State	RETURNED TO COMPLIANCE
9510004	9310003	SOX	State Compliance achieved	01-JAN-1995	State	RETURNED TO COMPLIANCE

1 - 48 of 48

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
SSJID - PURCHASED TREATED SW	31276	Yes	Consecutive Connection	Surface water	Permanent	Active
WELL NO. 10 - RAW	13531	Yes	Well	Ground water	Permanent	Active
WELL NO. 06 - RAW	13523	Yes	Well	Ground water	Permanent	Active
WELL NO. 07 - RAW	13522	Yes	Well	Ground water	Permanent	Active
WELL NO. 08 - RAW	13521	Yes	Well	Ground water	Permanent	Active
WELL 21 - INACTIVE	22024	Yes	Well	Ground water	Other	Inactive
WELL 01 - DESTROYED	19537	Yes	Well	Ground water	Other	Inactive
WELL 03 - DESTROYED	19536	Yes	Well	Ground water	Other	Inactive
WELL 04 - DESTROYED	19535	Yes	Well	Ground water	Other	Inactive
WELL 05 - DESTROYED	19534	Yes	Well	Ground water	Other	Inactive
WELL NO. 09 - RAW - INACTIVE	13520	Yes	Well	Ground water	Other	Inactive
COMBINED RAW	54878	No	Common Headers	-	-	Active
DISTRIBUTION SYSTEM	31275	No	Distribution System/Zone	-	-	Active
COMBINED TREATED	54879	No	Treatment Plant	-	-	Active
WELL NO. 09 - XCLD	2265	No	Treatment Plant	-	-	Inactive
WELL NO. 06 - XCLD	2272	No	Treatment Plant	-	-	Inactive
WELL NO. 07 - XCLD	2273	No	Treatment Plant	-	-	Inactive
WELL NO. 08 - XCLD	2275	No	Treatment Plant	-	-	Inactive
WELL NO. 10 - XCLD	35357	No	Treatment Plant	-	-	Inactive
WELL 21 - TREATED - INACTIVE	6655	No	Treatment Plant	-	-	Inactive

1 - 20 of 20

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL NO. 09 - XCLD	2265	Hypochlorination, Post	Disinfection
WELL NO. 06 - XCLD	2272	Hypochlorination, Post	Disinfection
WELL NO. 07 - XCLD	2273	Hypochlorination, Post	Disinfection
WELL NO. 08 - XCLD	2275	Hypochlorination, Post	Disinfection
WELL NO. 10 - XCLD	35357	Hypochlorination, Post	Disinfection
COMBINED TREATED	54879	Filtration, Pressure Sand	Inorganics removal
WELL 21 - TREATED - INACTIVE	6655	Filtration, Greensand	Manganese removal

1 - 7 of 7

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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