Is SAN YSIDRO WATER SUPPLY SYSTEM required to publish a Consumer Confidence Report?

Yes. SAN YSIDRO WATER SUPPLY SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is SAN YSIDRO WATER SUPPLY SYSTEM’s next Consumer Confidence Report due?

SAN YSIDRO WATER SUPPLY SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

SAN YSIDRO, NM · Sandoval County

SAN YSIDRO WATER SUPPLY SYSTEM Water System

Consumer Confidence Report status

SAN YSIDRO WATER SUPPLY SYSTEM must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 1 open health-based violation for SAN YSIDRO WATER SUPPLY SYSTEM.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)

SAN YSIDRO WATER SUPPLY SYSTEM is one of 667 community water systems in New Mexico in the 500 or fewer people size category, serving 166 people from groundwater.

As of August 1, 2026, its federal record holds 27 entries between 1984 and 2025, of which 1 health-based item remains open.

Of the 27, 12 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves inorganic chemicals, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Consumer Confidence Rule.

Violation history

Failure To Address Deficiency
Health-based
Groundwater Rule
July 12, 2025
Unaddressed
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2023 – March 31, 2023
Resolved
Monitoring, Regular
—
Arsenic
October 1, 2022 – July 29, 2022
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2022 – March 31, 2022
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2022 – March 31, 2022
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2021 – December 7, 2021
Resolved
Monitoring, Regular
—
Arsenic
October 1, 2021 – December 31, 2021
Resolved
Monitoring, Regular
—
Fluoride
October 1, 2021 – December 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2021 – December 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2021 – September 30, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2021 – June 30, 2021
Archived
Monitoring, Regular
—
Arsenic
January 1, 2021 – March 31, 2021
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2020 – December 31, 2020
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2020 – September 30, 2020
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
August 1, 2020 – August 31, 2020
Resolved
Monitoring, Regular
—
Arsenic
July 1, 2020 – September 30, 2020
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2020 – September 30, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2020 – September 30, 2020
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – August 7, 2020
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2020 – July 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2016 – September 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2016 – June 30, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2016 – March 31, 2016
Resolved
Monitoring and Reporting (DBP)
—
TTHM
April 1, 2009 – June 30, 2009
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2008 – December 31, 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
July 12, 2025	Failure To Address Deficiency	Groundwater Rule	Health-based	Unaddressed
January 1, 2023 – March 31, 2023	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2022 – July 29, 2022	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2022 – March 31, 2022	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
October 1, 2021 – December 7, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2021 – December 31, 2021	Monitoring, Regular	Arsenic	—	Resolved
October 1, 2021 – December 31, 2021	Monitoring, Regular	Fluoride	—	Resolved
October 1, 2021 – December 31, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
July 1, 2021 – September 30, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
April 1, 2021 – June 30, 2021	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
January 1, 2021 – March 31, 2021	Monitoring, Regular	Arsenic	—	Resolved
October 1, 2020 – December 31, 2020	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
September 1, 2020 – September 30, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2020 – August 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring, Regular	Arsenic	—	Resolved
July 1, 2020 – September 30, 2020	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2020 – September 30, 2020	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
July 1, 2020 – August 7, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2020 – July 31, 2020	Monitoring and Reporting (DBP)	TTHM	—	Resolved
July 1, 2016 – September 30, 2016	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
April 1, 2016 – June 30, 2016	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
April 1, 2009 – June 30, 2009	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2008 – December 31, 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

November 25, 2024State Compliance achieved4 linked violations
November 25, 2024State Public Notification received5 linked violations
October 24, 2024State Violation/Reminder Notice5 linked violations
July 31, 2024State Public Notification received4 linked violations
October 19, 2023State Compliance achieved5 linked violations
October 11, 2023State Public Notification requested4 linked violations
September 27, 2023State Violation/Reminder Notice2 linked violations
March 31, 2023State Compliance achieved6 linked violations
September 16, 2022State Administrative/Compliance Order without penalty issued17 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
September 8, 2021State Public Notification received3 linked violations
August 17, 2021State Violation/Reminder Notice3 linked violations
August 17, 2021State Public Notification requested3 linked violations
May 7, 2021State Public Notification requested3 linked violations
March 1, 2021State Public Notification received4 linked violations
February 22, 2021State Violation/Reminder Notice4 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 Public Notification requested6 linked violations
October 13, 2020State Violation/Reminder Notice6 linked violations
October 13, 2020State Violation/Reminder Notice3 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 8, 2020State Public Notification received3 linked violations
July 8, 2020State Compliance achieved5 linked violations
August 11, 2018State Compliance achieved4 linked violations
February 2, 2018State Public Notification received5 linked violations
January 19, 2018State Public Notification requested4 linked violations
December 18, 2017State Compliance achieved16 linked violations
November 1, 2017State Public Notification received4 linked violations
June 12, 2017State Public Notification received5 linked violations
September 29, 2016State Public Notification received4 linked violations
August 25, 2016State Compliance achieved3 linked violations
April 18, 2016State Violation/Reminder Notice27 linked violations
June 30, 2015State Violation/Reminder Notice5 linked violations
June 30, 2015State Public Notification requested6 linked violations
July 16, 2013State Public Notification requested8 linked violations
July 2, 2012State Public Notification received19 linked violations
June 13, 2011State Compliance achieved17 linked violations
May 20, 2011State Public Notification received6 linked violations
September 17, 2009State Compliance achieved6 linked violations
September 26, 2007State Compliance achieved51 linked violations
May 14, 2007State Compliance achieved3 linked violations
October 11, 2004State Compliance achieved12 linked violations
September 19, 1997State Public Notification requested7 linked violations

Common questions

Is SAN YSIDRO WATER SUPPLY SYSTEM required to publish a Consumer Confidence Report?: Yes. SAN YSIDRO WATER SUPPLY SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SAN YSIDRO WATER SUPPLY SYSTEM’s next Consumer Confidence Report due?: SAN YSIDRO WATER SUPPLY SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SAN YSIDRO WATER SUPPLY SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 open health-based violation for SAN YSIDRO WATER SUPPLY SYSTEM.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MARTINEZ, SHAWNASI

575-834-7398

SAN YSIDRO, NM 87053