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Public water system record

Greater Chimayo MDWCA

Serves Chimayo and Rio Chiquito, Rio Arriba County and Santa Fe County, NM · 1,050 people served

Federal records show 3 health-based violations and 14 monitoring/reporting issues for Greater Chimayo MDWCA in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

  • NM3502426
  • CHIMAYO
  • NM
  • 1,050 served

System profile

Source water Groundwater
ZIP 87522
EPA system ID NM3502426

Verify this system on EPA ECHO →

Health-based violations, last 10 years
3
Resolved
2
Unresolved
1
Any acute record
No
Monitoring issues, last 10 years
14

Key facts

  • Greater Chimayo MDWCA draws water from 2 wells.
  • Record on file since 2010, with 7 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
Groundwater Rule
Treatment technique failure
 140 Jul 12, 2018 Resolved No
Groundwater Rule
Treatment technique failure
 140 Jan 21, 2015 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 1, 2025 Resolved
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Active
Consumer Confidence Rule
OTHER
 Jul 1, 2023 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2022 Resolved
Chlorine
Monitoring and reporting
 Oct 1, 2021 Resolved
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2021 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2021 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Sep 1, 2020 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2020 Resolved
Public Notice
OTHER
 Jan 10, 2019 Resolved
Public Notice
OTHER
 Oct 21, 2018 Resolved
Public Notice
OTHER
 Mar 22, 2018 Resolved
Public Notice
OTHER
 Mar 12, 2018 Resolved
Public Notice
OTHER
 Mar 4, 2018 Resolved

Full record since 2010

EPA's records for Greater Chimayo MDWCA go back to 2010. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 6 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2010 to October 18, 2016 7 6
October 19, 2016 to 2019 1 5
2020s 1 9

Most recent health-based violation before October 19, 2016: Groundwater Rule, began June 2015, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Groundwater Rule
Treatment technique failure
 Jun 6, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Jan 21, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Jan 21, 2015 Resolved
Groundwater Rule
Treatment technique failure
 Jan 21, 2015 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 110 µg/L, federal limit 30 µg/L (3.7 times the limit)
 Oct 1, 2010 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 110 µg/L, federal limit 30 µg/L (3.7 times the limit)
 Jul 1, 2010 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 110 µg/L, federal limit 30 µg/L (3.7 times the limit)
 Apr 1, 2010 Resolved

What the violations mean

Groundwater Rule

2 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.

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

Greater Chimayo MDWCA draws water from 2 wells.

Annual water quality report

Greater Chimayo MDWCA 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.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

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