Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	NM3560007
PWS Name	MESILLA WATER SYSTEM
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	2167
County Served	Dona Ana

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
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	46946	Returned to Compliance	20-NOV-2024	-	Yes
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	46948	Open	17-OCT-2024	-	No
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	46949	Open	17-OCT-2024	-	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46944	Returned to Compliance	19-DEC-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46938	Returned to Compliance	18-NOV-2020	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	46937	Returned to Compliance	01-NOV-2020	30-NOV-2020	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	46943	Returned to Compliance	01-OCT-2020	31-DEC-2020	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	46936	Returned to Compliance	01-JUL-2020	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	46945	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	46939	Returned to Compliance	01-JUL-2019	30-JUN-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	46940	Returned to Compliance	01-JUL-2019	30-JUN-2020	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	46928	Returned to Compliance	01-OCT-2018	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46934	Returned to Compliance	18-AUG-2018	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	46933	Returned to Compliance	01-JUL-2018	30-JUN-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	46932	Returned to Compliance	01-JUL-2018	30-JUN-2019	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46925	Returned to Compliance	08-FEB-2018	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46924	Returned to Compliance	08-FEB-2018	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46927	Returned to Compliance	08-FEB-2018	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46926	Returned to Compliance	08-FEB-2018	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46935	Returned to Compliance	25-OCT-2017	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	46947	Returned to Compliance	01-OCT-2017	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	46923	Returned to Compliance	25-AUG-2017	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	46920	Returned to Compliance	25-AUG-2017	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	46922	Returned to Compliance	25-AUG-2017	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	46921	Returned to Compliance	25-AUG-2017	-	Yes
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	46919	Returned to Compliance	01-JUL-2017	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	46918	Returned to Compliance	01-JUL-2016	30-JUN-2017	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	46917	Returned to Compliance	01-JUL-2016	30-JUN-2017	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	46929	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	46931	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	46915	Returned to Compliance	01-JUL-2015	31-AUG-2016	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	46916	Returned to Compliance	01-JUL-2015	31-AUG-2016	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	46930	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	46914	Returned to Compliance	01-JAN-2014	31-AUG-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	46913	Returned to Compliance	01-JAN-2014	31-AUG-2014	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	46912	Returned to Compliance	01-APR-2012	30-APR-2012	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46911	Returned to Compliance	27-JUN-2010	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	46909	Returned to Compliance	01-MAY-2009	31-MAY-2009	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	46910	Returned to Compliance	12-JUN-2008	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	46908	Returned to Compliance	01-JAN-2008	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	46907	Returned to Compliance	01-MAY-2007	31-MAY-2007	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	46906	Returned to Compliance	01-OCT-2005	31-OCT-2005	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	46805	Returned to Compliance	01-AUG-2005	31-AUG-2005	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	46950	Returned to Compliance	01-JAN-2002	31-DEC-2010	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	46701	Returned to Compliance	01-AUG-2001	31-AUG-2001	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1V00	Returned to Compliance	19-OCT-1999	01-MAR-2000	No

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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
95	46950	SIA	State Violation/Reminder Notice	18-JUL-2025	State	-
94	46949	SIE	State Public Notification requested	17-APR-2025	State	-
92	46948	SIE	State Public Notification requested	17-APR-2025	State	-
90	46946	SOX	State Compliance achieved	25-FEB-2025	State	-
88	46947	SIA	State Violation/Reminder Notice	10-JAN-2025	State	-
83	46944	SOX	State Compliance achieved	25-JUL-2023	State	"This PN violation is being returned to compliance based on the fact that the underlying violation is greater than a year old and the underlying violation has been resolved by the water system. This is being done as per NMED-DWB Staff Guidance titled "Public Notice Violation Resolving Action Code Guidance"
81	46945	SIF	State Public Notification received	28-JUN-2023	State	-
78	46943	SIF	State Public Notification received	19-FEB-2022	State	-
72	46940	SOX	State Compliance achieved	18-AUG-2021	State	SYSTEM COLLECTED DBP2 SAMPLES DURING THE CORRECT MONTH AND AT THE CORRECT LOCATION
72	46933	SOX	State Compliance achieved	18-AUG-2021	State	SYSTEM COLLECTED DBP2 SAMPLES DURING THE CORRECT MONTH AND AT THE CORRECT LOCATION
72	46932	SOX	State Compliance achieved	18-AUG-2021	State	SYSTEM COLLECTED DBP2 SAMPLES DURING THE CORRECT MONTH AND AT THE CORRECT LOCATION
72	46939	SOX	State Compliance achieved	18-AUG-2021	State	SYSTEM COLLECTED DBP2 SAMPLES DURING THE CORRECT MONTH AND AT THE CORRECT LOCATION
71	46913	SIF	State Public Notification received	12-FEB-2021	State	-
71	46914	SIF	State Public Notification received	12-FEB-2021	State	-
71	46915	SIF	State Public Notification received	12-FEB-2021	State	-
71	46916	SIF	State Public Notification received	12-FEB-2021	State	-
69	46917	SIF	State Public Notification received	12-FEB-2021	State	-
69	46918	SIF	State Public Notification received	12-FEB-2021	State	-
65	46929	SIF	State Public Notification received	12-FEB-2021	State	-
65	46931	SIF	State Public Notification received	12-FEB-2021	State	-
65	46930	SIF	State Public Notification received	12-FEB-2021	State	-
70	46935	SOX	State Compliance achieved	11-FEB-2021	State	-
68	46934	SOX	State Compliance achieved	11-FEB-2021	State	-
64	46938	SOX	State Compliance achieved	11-FEB-2021	State	-
61	46937	SOX	State Compliance achieved	31-DEC-2020	State	SYSTEM COLLECTED TC SAMPLE
58	46936	SOX	State Compliance achieved	16-JUL-2020	State	-
52	46921	SIF	State Public Notification received	31-JAN-2020	State	-
48	46920	SIF	State Public Notification received	31-JAN-2020	State	-
54	46922	SIF	State Public Notification received	31-JAN-2020	State	-
50	46923	SIF	State Public Notification received	31-JAN-2020	State	-
51	46927	SOX	State Compliance achieved	31-JAN-2020	State	-
47	46926	SOX	State Compliance achieved	31-JAN-2020	State	-
49	46925	SOX	State Compliance achieved	31-JAN-2020	State	-
53	46924	SOX	State Compliance achieved	31-JAN-2020	State	-
38	46928	SOX	State Compliance achieved	08-NOV-2018	State	-
34	46919	SOX	State Compliance achieved	22-JUN-2018	State	-
20	46909	SIF	State Public Notification received	18-MAR-2015	State	-
19	46911	SO6	State Intentional no-action	19-DEC-2014	State	PN violation was for TCR routine non-sampling in May 2009underlying violation has returned to compliance system collected TC sample on 6/22/2009
17	46912	SIE	State Public Notification requested	15-MAY-2012	State	-
14	46908	SOX	State Compliance achieved	25-OCT-2010	State	AUTOMATIC RETURN TO COMPLIANCE 10/21/2010
7	46910	SOX	State Compliance achieved	22-OCT-2010	State	-
102108	46907	SIE	State Public Notification requested	12-JUN-2007	State	-
5	46906	SOX	State Compliance achieved	31-MAY-2007	State	AUTOMATIC RETURN TO COMPLIANCE 10/19/2010
73	46805	SOX	State Compliance achieved	25-SEP-2005	State	SYSTEM RETURNED TO COMPLIANCE ON 9/29/2005 PER BRANDI LITTLETON
74	46701	SOX	State Compliance achieved	09-SEP-2004	State	SYSTEM RETURNED TO COMPLIANCE ON 9/9/2004 PER BRANDI LITTLETON
1E00	1V00	EOX	Federal Compliance achieved	01-MAR-2000	ODSWeb	-

1 - 46 of 46

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CONSECUTIVE CONNECTION #1	9695	Yes	Consecutive Connection	Ground water	Emergency	Inactive
WELL #2	3555	Yes	Well	Ground water	Permanent	Active
WELL #1	3554	Yes	Well	Ground water	Permanent	Active
WELL #4	2533	Yes	Well	Ground water	Emergency	Inactive
WELL #3	2532	Yes	Well	Ground water	Emergency	Inactive
DIST	5787	No	Distribution System/Zone	-	-	Active
BOOSTER PUMP FACILITY #1	8146	No	Other	-	-	Inactive
STORAGE TANK #1	7973	No	Storage	-	-	Active
STORAGE TANK #3	8141	No	Storage	-	-	Inactive
STORAGE TANK #4	8142	No	Storage	-	-	Inactive
PRESSURE TANK #1	8148	No	Storage	-	-	Inactive
TREATMENT PLANT #1	1484	No	Treatment Plant	-	-	Active
TREATMENT PLANT #2	936	No	Treatment Plant	-	-	Active

1 - 13 of 13

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT #1	1484	Gaseous Chlorination, Post	Disinfection
TREATMENT PLANT #2	936	Gaseous Chlorination, Post	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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