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Public water system record

Las Mesas

On record as serving Ponce, Ponce Municipio, PR · Serves 120 people

Federal records show 2 health-based violations and 41 monitoring/reporting issues for Las Mesas in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

  • PR0458004
  • PONCE
  • PR
  • 120 served

System profile

Source water Surface water
ZIP 00780
EPA system ID PR0458004

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
0
Unresolved
2
Any acute record
No
Monitoring issues, last 10 years
41

Key facts

  • Las Mesas draws water from 1 surface water intake.
  • Most recent formal enforcement: compliance order (no penalty) by EPA, September 2010.
  • Record on file since 1992, with 13 health-based violations before October 19, 2016.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Active No
Surface Water Treatment Rule
Treatment technique failure
 120 Jan 1, 2007 Active
Enforcement action in place
 No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
 Dec 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Nov 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Sep 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Aug 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jun 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 May 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Mar 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Feb 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Dec 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Active
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Sep 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Aug 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jun 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 May 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Mar 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Feb 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2023 Active
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Apr 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Apr 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Feb 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Revised Total Coliform Rule
Monitoring violation
 Apr 1, 2019 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.

Full record since 1992

EPA's records for Las Mesas go back to 1992. Before October 19, 2016 they list 13 health-based violations (1 resolved, 1 not resolved, 11 archived by EPA without a recorded fix) and 317 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 7 69
2000s 6 172
2010 to October 18, 2016 0 76
October 19, 2016 to 2019 0 3
2020s 1 38

Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began January 2007, Active.

Show all 13 health-based violations before October 19, 2016
Contaminant Start date Status
Surface Water Treatment Rule
Treatment technique failure
 Jan 1, 2007 Active
Total Coliform (acute)
Contaminant limit exceeded
 Jul 1, 2001 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Apr 1, 2001 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Nov 1, 2000 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Jul 1, 2000 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Mar 1, 2000 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Apr 1, 1999 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Feb 1, 1999 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Dec 1, 1998 Archived
Total Coliform (acute)
Contaminant limit exceeded
 May 1, 1998 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Oct 1, 1997 Archived
Total Coliform (acute)
Contaminant limit exceeded
 Sep 1, 1997 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jan 1, 1992 Resolved

Enforcement actions

Puerto Rico regulators and EPA took 4 formal enforcement actions against Las Mesas and issued 3 boil water orders between 1995 and 2010. The most recent was a compliance order (no penalty) in September 2010.

Date By Action Violations covered
Sep 24, 2010 EPA Compliance order (no penalty) 1 violation (1 health-based): Surface Water Treatment Rule
Mar 23, 2010 Puerto Rico Boil water order 42 violations: Total Coliform
Sep 10, 2009 Puerto Rico Boil water order 33 violations: Total Coliform
Mar 27, 2009 Puerto Rico Boil water order 30 violations: Total Coliform
Aug 10, 2006 EPA Compliance order (no penalty) 2 violations (2 health-based): Surface Water Treatment Rule
Aug 14, 2003 EPA Compliance order (no penalty) 173 violations (12 health-based): Total Coliform, Surface Water Treatment Rule
Jan 10, 1995 EPA Compliance order (no penalty) 67 violations (6 health-based): Total Coliform, Surface Water Treatment Rule

What the violations mean

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Surface Water Treatment Rule

1 incident

The system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Las Mesas draws water from 1 surface water intake.

Annual water quality report

Las Mesas must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Las Mesas for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Puerto Rico.

Certified drinking water labs by state EPA guidance for private wells