SAN YSIDRO, NM · Sandoval County

SAN YSIDRO WATER SUPPLY SYSTEM Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace New Mexico’s official records. Always confirm current status with New Mexico before making decisions based on this information.

System facts

System ID (PWSID): NM3509723
System type: Community Water System
Population served: 166
Service connections: 96
Ownership: local government
Water source: groundwater (wells)

Violation history

LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024
Unaddressed
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2023 – June 30, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2023 – March 31, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
January 1, 2023 – March 31, 2023
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2022 – December 31, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2021 – December 31, 2021
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2021 – December 7, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2021 – June 30, 2021
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2021 – March 31, 2021
Archived
Monitoring, Regular
—
Arsenic
October 1, 2020 – December 31, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2020 – September 30, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2020 – September 30, 2020
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 5, 2020 – July 8, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2020 – July 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2017 – March 31, 2017
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2016 – September 30, 2016
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
August 31, 2012 – August 11, 2018
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2011 – March 31, 2011
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2010 – June 13, 2011
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2009 – June 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2008 – December 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2008 – September 30, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
July 1, 1984 – June 30, 1987
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 1984 – June 30, 1987
Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
October 17, 2024	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
April 1, 2023 – June 30, 2023	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
October 1, 2022 – December 31, 2022	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2021 – December 7, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
April 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
January 1, 2021 – March 31, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
October 1, 2020 – December 31, 2020	Monitoring, Regular	Arsenic	—	Resolved
September 1, 2020 – September 30, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
June 5, 2020 – July 8, 2020	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2020 – July 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2017 – March 31, 2017	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
August 31, 2012 – August 11, 2018	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
January 1, 2011 – March 31, 2011	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2010 – June 13, 2011	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
April 1, 2009 – June 30, 2009	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2008 – December 31, 2008	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2008 – September 30, 2008	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 1984 – June 30, 1987	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Archived
July 1, 1984 – June 30, 1987	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

September 22, 2025State Public Notification requested5 linked violations
June 2, 2025State Public Notification requested6 linked violations
October 24, 2024State Public Notification requested4 linked violations
June 4, 2024State Compliance achieved8 linked violations
April 11, 2024State Public Notification requested7 linked violations
April 11, 2024State Violation/Reminder Notice8 linked violations
October 17, 2023State Public Notification received5 linked violations
October 11, 2023State Violation/Reminder Notice5 linked violations
September 27, 2023State Violation/Reminder Notice2 linked violations
June 13, 2023State Violation/Reminder Notice25 linked violations
June 5, 2023State Violation/Reminder Notice5 linked violations
June 5, 2023State Public Notification requested5 linked violations
March 31, 2023State Compliance achieved6 linked violations
March 15, 2023State Public Notification received6 linked violations
August 31, 2022State Public Notification requested5 linked violations
February 23, 2022State Public Notification requested6 linked violations
February 23, 2022State Violation/Reminder Notice6 linked violations
August 17, 2021State Violation/Reminder Notice3 linked violations
May 7, 2021State Violation/Reminder Notice3 linked violations
February 22, 2021State Violation/Reminder Notice4 linked violations
February 22, 2021State Public Notification requested4 linked violations
November 3, 2020State Public Notification received3 linked violations
October 29, 2020State Compliance achieved3 linked violations
October 29, 2020State Compliance achieved3 linked violations
October 20, 2020State Compliance achieved4 linked violations
October 13, 2020State Violation/Reminder Notice3 linked violations
October 13, 2020State Violation/Reminder Notice6 linked violations
October 13, 2020State Public Notification requested6 linked violations
October 13, 2020State Public Notification requested3 linked violations
September 2, 2020State Public Notification requested6 linked violations
September 2, 2020State Violation/Reminder Notice6 linked violations
August 7, 2020State Compliance achieved4 linked violations
July 13, 2020State Violation/Reminder Notice3 linked violations
July 8, 2020State Public Notification received3 linked violations
May 5, 2020State Violation/Reminder Notice3 linked violations
January 19, 2018State Violation/Reminder Notice4 linked violations
November 1, 2017State Public Notification received4 linked violations
October 17, 2017State Violation/Reminder Notice4 linked violations
October 17, 2017State Public Notification requested3 linked violations
June 12, 2017State Public Notification received5 linked violations
March 20, 2017State Public Notification requested5 linked violations
September 29, 2016State Public Notification received4 linked violations
August 25, 2016State Compliance achieved3 linked violations
August 16, 2016State Public Notification requested3 linked violations
April 18, 2016State Public Notification requested7 linked violations
April 18, 2016State Violation/Reminder Notice27 linked violations
June 30, 2015State Public Notification requested5 linked violations
July 2, 2012State Public Notification received19 linked violations
May 20, 2011State Public Notification received6 linked violations
September 17, 2009State Compliance achieved6 linked violations
September 9, 2009State Compliance achieved18 linked violations
May 14, 2007State Compliance achieved3 linked violations
October 11, 2004State Compliance achieved12 linked violations
July 1, 2000Federal Compliance achieved56 linked violations
September 9, 1999State Public Notification received6 linked violations
April 29, 1998State Violation/Reminder Notice6 linked violations
September 19, 1997State Public Notification requested7 linked violations
September 19, 1997State Violation/Reminder Notice4 linked violations

Contact

MARTINEZ, SHAWNASI

575-834-7398

SAN YSIDRO, NM 87053