Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	TX2420001
PWS Name	SHAMROCK MUNICIPAL WATER SYSTEM
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	2311
County Served	Wheeler

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
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	90064682	Returned to Compliance	01-MAR-2025	31-MAR-2025	No
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	90064681	Returned to Compliance	01-JUL-2022	30-SEP-2022	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	90064670	Returned to Compliance	30-DEC-2015	-	No
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	90064669	Returned to Compliance	01-OCT-2015	31-DEC-2015	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90064666	Returned to Compliance	22-JAN-2015	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	90064663	Returned to Compliance	01-OCT-2014	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	90064659	Returned to Compliance	01-AUG-2014	31-AUG-2014	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	90064665	Returned to Compliance	01-JUL-2014	30-SEP-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	90064664	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	90064661	Returned to Compliance	01-JUL-2013	30-SEP-2013	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	90064662	Returned to Compliance	01-JAN-2013	31-MAR-2013	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90064657	Returned to Compliance	12-MAY-2012	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	90064656	Returned to Compliance	01-MAR-2012	31-MAR-2012	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90064649	Returned to Compliance	12-FEB-2012	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	90064650	Returned to Compliance	01-JAN-2012	31-JAN-2012	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90064644	Returned to Compliance	18-DEC-2011	-	No
Other	Public Notification Violation without NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90064643	Returned to Compliance	20-JUN-2011	-	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	90064640	Returned to Compliance	01-JUN-2011	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	70040542	Returned to Compliance	01-NOV-2009	30-NOV-2009	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	70040540	Returned to Compliance	01-OCT-2009	31-OCT-2009	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	90064638	Returned to Compliance	01-JUL-2009	30-SEP-2009	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90064639	Returned to Compliance	12-MAR-2009	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1	Returned to Compliance	01-JAN-2009	31-JAN-2009	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040539	Returned to Compliance	01-JAN-2007	31-MAR-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040538	Returned to Compliance	01-OCT-2006	31-DEC-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040537	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040536	Returned to Compliance	01-APR-2006	30-JUN-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040535	Returned to Compliance	01-JAN-2006	31-MAR-2006	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040534	Returned to Compliance	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040527	Returned to Compliance	01-JUL-2005	30-SEP-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040533	Returned to Compliance	01-APR-2005	30-JUN-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040532	Returned to Compliance	01-JAN-2005	31-MAR-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040531	Returned to Compliance	01-OCT-2004	31-DEC-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040530	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040529	Returned to Compliance	01-APR-2004	30-JUN-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	70040528	Returned to Compliance	01-JAN-2004	31-MAR-2004	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	391	Known	01-FEB-1991	28-FEB-1991	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	291	Known	01-FEB-1991	28-FEB-1991	Yes

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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
90107650	90064682	SOX	State Compliance achieved	01-DEC-2025	State	SOX'D 3A MARCH 2025 VIOLATION BECAUSE PWS FULFILLED SAMPLING REQUIREMENTS FOR APRIL 2025.
90107646	90064681	SOX	State Compliance achieved	24-MAR-2023	State	20230324; ISHARP; ONE VIOLATION RTCD BASED ON ELIGIBILITY
90107640	90064669	SOX	State Compliance achieved	09-JUN-2016	State	-
90107634	90064640	SOX	State Compliance achieved	09-FEB-2016	State	JLIRON; 02092016; WELLS SAMPLED SINCE VIOLATION.
90107636	90064670	SOX	State Compliance achieved	05-FEB-2016	State	-
90107630	90064663	SOX	State Compliance achieved	02-OCT-2015	State	-
90107629	90064664	SOX	State Compliance achieved	19-MAR-2015	State	20150319; KMURPHY
90107629	90064665	SOX	State Compliance achieved	19-MAR-2015	State	20150319; KMURPHY
90107624	90064666	SIA	State Violation/Reminder Notice	05-FEB-2015	State	-
90107619	90064659	SOX	State Compliance achieved	28-OCT-2014	State	-
90107616	90064661	SOX	State Compliance achieved	21-OCT-2014	State	20141021; KMURPHY; ERP REVIEW
90107616	90064662	SOX	State Compliance achieved	21-OCT-2014	State	20141021; KMURPHY; ERP REVIEW
90107610	90064650	SOX	State Compliance achieved	30-JUN-2014	State	-
90107610	90064656	SOX	State Compliance achieved	30-JUN-2014	State	-
29	90064657	SIA	State Violation/Reminder Notice	21-MAY-2012	State	-
16	90064643	SOX	State Compliance achieved	20-MAR-2012	State	-
16	90064644	SOX	State Compliance achieved	20-MAR-2012	State	-
16	90064649	SOX	State Compliance achieved	20-MAR-2012	State	-
90107607	90064638	SOX	State Compliance achieved	21-JAN-2011	State	SDWIS CLEANUP
90107606	1	SIF	State Public Notification received	22-SEP-2010	State	-
1	90064639	SOX	State Compliance achieved	01-AUG-2010	State	AUTOMATIC RETURN TO COMPLIANCE 02/01/2011
70086492	70040539	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040537	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040536	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040535	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040534	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040533	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040532	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040531	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040530	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040529	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040528	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040527	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
70086492	70040538	SOX	State Compliance achieved	09-JUL-2010	State	SDWIS 2010 CLEANUP
3	70040542	SOX	State Compliance achieved	01-JUN-2010	State	AUTOMATIC RETURN TO COMPLIANCE 02/01/2011
70086487	70040540	SIE	State Public Notification requested	02-NOV-2009	State	-
191	391	SFJ	State Formal Notice of Violation issued	20-MAR-1991	State	-
191	291	SFJ	State Formal Notice of Violation issued	20-MAR-1991	State	-

1 - 38 of 38

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
N10	25953	Yes	Well	Ground water	Other	Inactive
N7	26067	Yes	Well	Ground water	Permanent	Active
W2	25965	Yes	Well	Ground water	Permanent	Active
W1 - WEST WELLFIELD	25962	Yes	Well	Ground water	Permanent	Active
N6	25961	Yes	Well	Ground water	Permanent	Active
N4 - NORTH WELLFIELD	25960	Yes	Well	Ground water	Permanent	Active
W5	25957	Yes	Well	Ground water	Permanent	Active
W3	25948	Yes	Well	Ground water	Permanent	Active
W4	25945	Yes	Well	Ground water	Permanent	Active
N8	26065	Yes	Well	Ground water	Other	Inactive
N14	26063	Yes	Well	Ground water	Other	Inactive
N12	26062	Yes	Well	Ground water	Other	Inactive
N11	26061	Yes	Well	Ground water	Other	Inactive
N3-A	25959	Yes	Well	Ground water	Other	Inactive
N2-A	25958	Yes	Well	Ground water	Other	Inactive
DISTRIBUTION SYSTEM	46326	No	Distribution System/Zone	-	-	Active
IN CITY - 750 GPM - SP	123534	No	Pump Facility	-	-	Inactive
IN CITY - 750 GPM - SP	123535	No	Pump Facility	-	-	Inactive
CR 3 & CR Y, SHAMROCK	140770	No	Sampling Station	-	-	Active
W HWY 83, O & Q, WHEELER	140771	No	Sampling Station	-	-	Active
W HWY 83, O & Q, WHEELER	59498	No	Sampling Station	-	-	Active
CR 3 & CR Y, SHAMROCK	59499	No	Sampling Station	-	-	Active
NORTH WELLFIELD - 0.500 MG - GR	123538	No	Storage	-	-	Active
WEST WELLFIELD - 0.500 MG - GR	123540	No	Storage	-	-	Active
S EDGE OF CITY - 0.075 MG - EL	123536	No	Storage	-	-	Inactive
PUMP STATION IN CITY - 0.500 MG - GR	123537	No	Storage	-	-	Inactive
PLANT - WEST WELL FIELD	11426	No	Treatment Plant	-	-	Active
PLANT - NORTH WELL FIELD	5254	No	Treatment Plant	-	-	Active

1 - 28 of 28

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
PLANT - WEST WELL FIELD	11426	Gaseous Chlorination, Pre	Disinfection
PLANT - WEST WELL FIELD	11426	4-Log Treatment of Viruses	Disinfection
PLANT - NORTH WELL FIELD	5254	4-Log Treatment of Viruses	Disinfection
PLANT - NORTH WELL FIELD	5254	Gaseous Chlorination, Pre	Disinfection

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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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