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PWS ID	MS0170025
PWS Name	CITY OF HORN LAKE - TWIN LAKES
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	1948
County Served	DeSoto

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	TTHM	2202584	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2202585	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2202581	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	2202580	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202530	Known	01-JAN-2010	31-MAR-2010	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2202531	Known	01-JAN-2010	31-MAR-2010	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2202532	Known	01-JAN-2010	31-MAR-2010	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2202528	Known	01-OCT-2009	31-DEC-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2202527	Known	01-OCT-2009	31-DEC-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202526	Known	01-OCT-2009	31-DEC-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202522	Known	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2202523	Known	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2202524	Known	01-JUL-2009	30-SEP-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2202519	Known	01-APR-2009	30-JUN-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2202520	Known	01-APR-2009	30-JUN-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202518	Known	01-APR-2009	30-JUN-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202514	Known	01-JAN-2009	31-MAR-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2202515	Known	01-JAN-2009	31-MAR-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2202516	Known	01-JAN-2009	31-MAR-2009	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	2202511	Known	01-OCT-2008	31-DEC-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	2202512	Known	01-OCT-2008	31-DEC-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202510	Known	01-OCT-2008	31-DEC-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2202209	Known	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202309	Known	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2202409	Known	01-JUL-2008	30-SEP-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2202009	Known	01-APR-2008	30-JUN-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2202109	Known	01-APR-2008	30-JUN-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2201909	Known	01-APR-2008	30-JUN-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2201609	Known	01-JAN-2008	31-MAR-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2201709	Known	01-JAN-2008	31-MAR-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2201809	Known	01-JAN-2008	31-MAR-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2201409	Known	01-OCT-2007	31-DEC-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2201509	Known	01-OCT-2007	31-DEC-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2201309	Known	01-OCT-2007	31-DEC-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2201008	Known	01-JUL-2007	30-SEP-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2201108	Known	01-JUL-2007	30-SEP-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2201208	Known	01-JUL-2007	30-SEP-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2200808	Known	01-APR-2007	30-JUN-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2200908	Known	01-APR-2007	30-JUN-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2200708	Known	01-APR-2007	30-JUN-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	2200408	Known	01-JAN-2007	31-MAR-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	2200608	Known	01-JAN-2007	31-MAR-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	2200508	Known	01-JAN-2007	31-MAR-2007	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2200306	Returned to Compliance	01-JUL-2006	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2200205	Returned to Compliance	01-JUL-2005	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	2200104	Known	05-NOV-2003	05-DEC-2003	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	2200103	Known	04-SEP-2003	04-OCT-2003	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
2202612	2202585	SO+	State no additional Formal Action needed	13-MAR-2025	State	-
2202612	2202584	SO+	State no additional Formal Action needed	13-MAR-2025	State	-
2202613	2202581	SOX	State Compliance achieved	06-MAR-2024	State	-
2202613	2202580	SOX	State Compliance achieved	06-MAR-2024	State	-
2202109	2200908	SIF	State Public Notification received	26-JUN-2009	State	-
2202209	2201008	SIF	State Public Notification received	26-JUN-2009	State	-
2202209	2201108	SIF	State Public Notification received	26-JUN-2009	State	-
2202209	2201208	SIF	State Public Notification received	26-JUN-2009	State	-
2202309	2201309	SIF	State Public Notification received	26-JUN-2009	State	-
2202309	2201409	SIF	State Public Notification received	26-JUN-2009	State	-
2202309	2201509	SIF	State Public Notification received	26-JUN-2009	State	-
2202409	2201609	SIF	State Public Notification received	26-JUN-2009	State	-
2202409	2201709	SIF	State Public Notification received	26-JUN-2009	State	-
2202409	2201809	SIF	State Public Notification received	26-JUN-2009	State	-
2202509	2201909	SIF	State Public Notification received	26-JUN-2009	State	-
2202509	2202009	SIF	State Public Notification received	26-JUN-2009	State	-
2202509	2202109	SIF	State Public Notification received	26-JUN-2009	State	-
2202609	2202209	SIF	State Public Notification received	26-JUN-2009	State	-
2202609	2202309	SIF	State Public Notification received	26-JUN-2009	State	-
2202609	2202409	SIF	State Public Notification received	26-JUN-2009	State	-
2202109	2200808	SIF	State Public Notification received	26-JUN-2009	State	-
2202109	2200708	SIF	State Public Notification received	26-JUN-2009	State	-
2202009	2200608	SIF	State Public Notification received	26-JUN-2009	State	-
2202009	2200508	SIF	State Public Notification received	26-JUN-2009	State	-
2202009	2200408	SIF	State Public Notification received	26-JUN-2009	State	-
2200506	2200306	SOX	State Compliance achieved	08-AUG-2006	State	-
2200306	2200205	SOX	State Compliance achieved	05-DEC-2005	State	-
2200204	2200104	SIF	State Public Notification received	20-NOV-2003	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL WL001	34648	Yes	Well	Ground water	Permanent	Active
WELL WL002	34649	Yes	Well	Ground water	Permanent	Inactive
WELL WL001	42893	Yes	Well	Ground water	Permanent	Active
WELL WL004	34651	Yes	Well	Ground water	Permanent	Active
WELL WL003	34650	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION DS000	37785	No	Distribution System/Zone	-	-	Active
STAGE 2 DBP	43936	No	Distribution System/Zone	-	-	Active
TREATMENT FACILITY TF080	31274	No	Treatment Plant	-	-	Active
TREATMENT PLANT TF080	42894	No	Treatment Plant	-	-	Active
TREATMENT FACILITY TF081	31275	No	Treatment Plant	-	-	Inactive

1 - 10 of 10

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT FACILITY TF080	31274	Lime - Soda Ash Addition	Corrosion control
TREATMENT FACILITY TF080	31274	Gaseous Chlorination, Post	Disinfection
TREATMENT FACILITY TF081	31275	Coagulation	Iron removal
TREATMENT FACILITY TF081	31275	Lime - Soda Ash Addition	Corrosion control
TREATMENT FACILITY TF081	31275	Sedimentation	Iron removal
TREATMENT FACILITY TF081	31275	Rapid Mix	Iron removal
TREATMENT FACILITY TF081	31275	Flocculation	Iron removal
TREATMENT FACILITY TF081	31275	Filtration, Rapid Sand	Iron removal
TREATMENT FACILITY TF081	31275	Gaseous Chlorination, Post	Disinfection
TREATMENT PLANT TF080	42894	Gaseous Chlorination, Post	Disinfection by-products control
TREATMENT PLANT TF080	42894	Fluoridation	Other
TREATMENT PLANT TF080	42894	Aeration, Slat Tray	Corrosion control
TREATMENT PLANT TF080	42894	Lime - Soda Ash Addition	Corrosion control

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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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