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Public water system record

Ancones Mdwwca

Serves an area of Rio Arriba County, NM that includes La Madera · 60 people served

Federal records show 7 health-based violations and 14 monitoring/reporting issues for Ancones Mdwwca in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

  • NM3504121
  • LA MADERA
  • NM
  • 60 served

System profile

Source water Groundwater
ZIP 87510
EPA system ID NM3504121

Verify this system on EPA ECHO →

Health-based violations, last 10 years
7
Resolved
7
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
14

Key facts

  • Ancones Mdwwca draws water from 1 well.
  • Highest measured level in the last 10 years: Combined Uranium, 41 µg/L, federal limit 30 µg/L (1.4 times the limit), 2017.
  • Record on file since 2015, with 13 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 32 service lines.

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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 Resolved No
Combined Uranium
Contaminant limit exceeded
Measured 40 µg/L, federal limit 30 µg/L (1.3 times the limit)
 340 Apr 1, 2017 Resolved No
Combined Uranium
Contaminant limit exceeded
Measured 41 µg/L, federal limit 30 µg/L (1.4 times the limit)
 340 Jan 1, 2017 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jun 16, 2016 Resolved No
Groundwater Rule
Treatment technique failure
 140 Dec 18, 2015 Resolved No
Groundwater Rule
Treatment technique failure
 140 Dec 18, 2015 Resolved No
Groundwater Rule
Treatment technique failure
 140 Dec 18, 2015 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Resolved
Consumer Confidence Rule
OTHER
 Oct 1, 2024 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2024 Resolved
Consumer Confidence Rule
OTHER
 Oct 1, 2023 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2023 Resolved
Public Notice
OTHER
 Jan 14, 2020 Resolved
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2019 Resolved
Public Notice
OTHER
 May 19, 2018 Resolved
Public Notice
OTHER
 Jan 18, 2018 Active
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2017 Resolved
Public Notice
OTHER
 Apr 20, 2017 Resolved
Public Notice
OTHER
 Mar 31, 2017 Resolved
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2016 Resolved
Public Notice
OTHER
 Apr 3, 2016 Resolved

Full record since 2015

EPA's records for Ancones Mdwwca go back to 2015. Before October 19, 2016 they list 13 health-based violations (13 resolved) and 3 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2010 to October 18, 2016 13 3
October 19, 2016 to 2019 2 6
2020s 1 6

Most recent health-based violation before October 19, 2016: Combined Uranium, began July 2016, Resolved.

Show all 13 health-based violations before October 19, 2016
Contaminant Start date Status
Combined Uranium
Contaminant limit exceeded
Measured 55 µg/L, federal limit 30 µg/L (1.8 times the limit)
 Jul 1, 2016 Resolved
Groundwater Rule
Treatment technique failure
 Jun 16, 2016 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 41 µg/L, federal limit 30 µg/L (1.4 times the limit)
 Apr 1, 2016 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Dec 18, 2015 Resolved

What the violations mean

Groundwater Rule

4 incidents

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

The utility had to notify customers about each of these violations.

Combined Uranium

2 incidents

Test results for Combined Uranium were above the federal limit (a maximum contaminant level violation).

The utility had to notify customers about each of these violations.

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.

Where the water comes from

Ancones Mdwwca draws water from 1 well.

Annual water quality report

Ancones Mdwwca 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 Ancones Mdwwca 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 New Mexico.

Certified drinking water labs by state EPA guidance for private wells