Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	WI6100337
PWS Name	THORP WATERWORKS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	1636
County Served	Clark

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 for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	2500294	Returned to Compliance	11-DEC-2024	-	No
TT	Public Education	Lead and Copper Rule	Lead and Copper Rule	2500292	Returned to Compliance	11-DEC-2024	-	Yes
MR	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	Lead and Copper Rule	2400260	Returned to Compliance	01-JAN-2024	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	2400263	Returned to Compliance	01-JAN-2024	30-JUN-2024	No
MR	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	Lead and Copper Rule	2400262	Returned to Compliance	01-JAN-2024	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	2400261	Returned to Compliance	01-JAN-2024	30-JUN-2024	No
MR	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	Lead and Copper Rule	2400256	Returned to Compliance	01-JAN-2024	-	No
MR	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	Lead and Copper Rule	2400259	Returned to Compliance	01-JAN-2024	-	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	2400257	Returned to Compliance	01-JAN-2024	30-JUN-2024	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	2400255	Returned to Compliance	01-JAN-2024	30-JUN-2024	No
MR	Water Quality Parameter M/R	Lead and Copper Rule	Lead and Copper Rule	2400258	Returned to Compliance	01-JAN-2024	30-JUN-2024	No
TT	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Stage 1 Disinfectants and Disinfection Byproducts Rule	2300253	Returned to Compliance	02-NOV-2022	-	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2200247	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2200248	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2000245	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2000246	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	1900241	Returned to Compliance	01-JUL-2019	30-SEP-2019	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	1900242	Returned to Compliance	01-JUL-2019	30-SEP-2019	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1600233	Returned to Compliance	01-FEB-2016	29-FEB-2016	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1600234	Returned to Compliance	01-JAN-2016	31-MAR-2016	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	1500216	Returned to Compliance	01-MAR-2014	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1400198	Returned to Compliance	01-FEB-2014	28-FEB-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1400199	Returned to Compliance	01-JAN-2014	31-MAR-2014	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0600180	Open	18-JUL-2006	-	No
MCL	Maximum Contaminant Level Violation, Single Sample	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	0600179	Returned to Compliance	01-APR-2006	10-JAN-2007	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	0200177	Returned to Compliance	01-JUL-2001	30-SEP-2001	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	0200178	Returned to Compliance	01-JUL-2001	30-SEP-2001	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	0000176	Returned to Compliance	19-JAN-2000	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	9800166	Returned to Compliance	01-APR-1998	30-APR-1998	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	9800165	Returned to Compliance	01-JAN-1998	31-MAR-1998	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	9500160	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	9500098	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	9500112	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	9500063	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	9500158	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	9500157	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	9500089	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	9500088	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	9500156	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	9500155	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	9500086	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	9500153	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	9500084	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	9500110	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	9500083	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	9500096	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	9500082	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	9500130	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	9500062	Returned to Compliance	01-OCT-1994	31-DEC-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	9500081	Returned to Compliance	01-OCT-1994	31-DEC-1994	No

1 - 50 of 114

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
2500152	2500292	SIE	State Public Notification requested	26-JUN-2025	State	-
2500153	2500294	SIA	State Violation/Reminder Notice	26-JUN-2025	State	-
2500150	2400257	SIF	State Public Notification received	07-MAY-2025	State	-
2500148	2400255	SIF	State Public Notification received	07-MAY-2025	State	-
2500147	2400256	SIF	State Public Notification received	07-MAY-2025	State	-
2500145	2400263	SIF	State Public Notification received	07-MAY-2025	State	-
2500149	2400258	SIF	State Public Notification received	07-MAY-2025	State	-
2500146	2400259	SIF	State Public Notification received	07-MAY-2025	State	-
2500142	2400260	SIF	State Public Notification received	07-MAY-2025	State	-
2500143	2400261	SIF	State Public Notification received	07-MAY-2025	State	-
2500144	2400262	SIF	State Public Notification received	07-MAY-2025	State	-
2300064	2300253	SIA	State Violation/Reminder Notice	04-NOV-2022	State	-
2200062	2200247	SOX	State Compliance achieved	13-JUL-2022	State	-
2200062	2200248	SOX	State Compliance achieved	13-JUL-2022	State	-
2100058	2000246	SIF	State Public Notification received	21-JUN-2021	State	-
2100058	2000245	SIF	State Public Notification received	21-JUN-2021	State	-
2000054	1900241	SIF	State Public Notification received	01-JUL-2020	State	-
2000054	1900242	SIF	State Public Notification received	01-JUL-2020	State	-
1600049	1600234	SIF	State Public Notification received	24-JUN-2016	State	-
1600049	1600233	SIF	State Public Notification received	24-JUN-2016	State	-
1500044	1400199	SIF	State Public Notification received	02-JUL-2015	State	-
1500045	1500216	SOX	State Compliance achieved	02-JUL-2015	State	-
1500044	1400198	SIF	State Public Notification received	02-JUL-2015	State	-
1100038	0600180	SO6	State Intentional no-action	22-FEB-2011	State	-
0700036	0600179	SOX	State Compliance achieved	10-JAN-2007	State	-
0200028	0200177	SIF	State Public Notification received	21-NOV-2001	State	-
0200032	0200178	SIF	State Public Notification received	21-NOV-2001	State	-
0000025	0000176	SOX	State Compliance achieved	20-MAR-2000	State	-
9800020	9800166	SIF	State Public Notification received	15-JUN-1998	State	-
9800018	9800165	SIF	State Public Notification received	01-JUN-1998	State	-
9500008	9500125	SIE	State Public Notification requested	23-MAY-1995	State	-
9500008	9500127	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500130	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500131	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500141	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500142	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500145	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500146	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500147	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500148	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500150	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500151	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500152	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500153	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500155	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500156	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500157	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500158	SIE	State Public Notification requested	23-MAY-1995	State	-
9500002	9500160	SIE	State Public Notification requested	23-MAY-1995	State	-
9500011	9500164	SIE	State Public Notification requested	23-MAY-1995	State	-

1 - 50 of 114

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
BF350	11	Yes	Well	Ground water	Permanent	Active
BF348	99	Yes	Well	Ground water	Permanent	Inactive
BF347	8	Yes	Well	Ground water	Permanent	Inactive
BF344	3	Yes	Well	Ground water	Permanent	Inactive
BF343	2	Yes	Well	Ground water	Permanent	Inactive
NV854	12	Yes	Well	Ground water	Permanent	Inactive
BF349	10	Yes	Well	Ground water	Permanent	Inactive
CM241	9	Yes	Well	Ground water	Permanent	Active
BF346	5	Yes	Well	Ground water	Permanent	Active
BF345	4	Yes	Well	Ground water	Permanent	Active
YN925	15	Yes	Well	Ground water	Permanent	Active
SH980	14	Yes	Well	Ground water	Permanent	Active
SH979	13	Yes	Well	Ground water	Permanent	Active
61003371	61003371	No	Distribution System/Zone	-	-	Active
200	200	No	Other	-	-	Active
300	300	No	Other	-	-	Active
200	200T	No	Treatment Plant	-	-	Active
300	300T	No	Treatment Plant	-	-	Active
BF345	4T	No	Treatment Plant	-	-	Active
BF346	5T	No	Treatment Plant	-	-	Active
BF349	10T	No	Treatment Plant	-	-	Inactive
BF350	11T	No	Treatment Plant	-	-	Inactive
SH979	13T	No	Treatment Plant	-	-	Inactive
SH980	14T	No	Treatment Plant	-	-	Inactive
BF348	99T	No	Treatment Plant	-	-	Inactive
CM241	9T	No	Treatment Plant	-	-	Inactive

1 - 26 of 26

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
BF350	11T	Hypochlorination, Pre	Disinfection
BF350	11T	pH Adjustment	Corrosion control
SH979	13T	Hypochlorination, Pre	Disinfection
SH979	13T	pH Adjustment	Corrosion control
SH980	14T	Hypochlorination, Pre	Disinfection
SH980	14T	pH Adjustment	Corrosion control
200	200T	Aeration, Packed Tower	Radionuclides removal
200	200T	Filtration, Pressure Sand	Inorganics removal
200	200T	Hypochlorination, Pre	Disinfection
200	200T	pH Adjustment	Corrosion control
300	300T	Hypochlorination, Pre	Disinfection
300	300T	pH Adjustment	Corrosion control
BF345	4T	Hypochlorination, Pre	Disinfection
BF345	4T	pH Adjustment	Corrosion control
BF346	5T	Hypochlorination, Pre	Disinfection
BF346	5T	pH Adjustment	Corrosion control
BF348	99T	Hypochlorination, Pre	Disinfection
BF348	99T	pH Adjustment	Corrosion control
CM241	9T	Hypochlorination, Pre	Disinfection
CM241	9T	pH Adjustment	Corrosion control

1 - 20 of 20

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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