Public water system record
Costilla MDWCA
Serves Costilla, Taos County, NM · 244 people served
Federal records show 8 health-based violations and 34 monitoring/reporting issues for Costilla MDWCA in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 8
- Resolved
- 2
- Unresolved
- 6
- Any acute record
- No
- Monitoring issues, last 10 years
- 34
Key facts
- Costilla MDWCA draws water from 2 wells.
- Most recent formal enforcement: compliance order (no penalty) by EPA, December 1992.
- Record on file since 1990, with 14 health-based violations before October 19, 2016.
Check whether Costilla MDWCA serves your address
Health-based violations
Since October 2016Violation 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 3, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jul 3, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jul 3, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jul 3, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 13, 2016 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 13, 2016 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 17, 2012 | Active | No |
Monitoring and reporting issues
Since October 2016Missed 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 |
|
Groundwater Rule
OTHER
|
Apr 7, 2024 | Active |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Dec 31, 2021 | Resolved |
|
Public Notice
OTHER
|
Dec 19, 2021 | Resolved |
|
Public Notice
OTHER
|
Oct 24, 2021 | Resolved |
|
Public Notice
OTHER
|
Oct 6, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2020 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Feb 16, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Apr 27, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Dec 8, 2017 | Resolved |
|
Public Notice
OTHER
|
Sep 30, 2017 | Resolved |
|
Public Notice
OTHER
|
Jun 10, 2017 | Resolved |
|
Public Notice
OTHER
|
Dec 4, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2016 | Resolved |
|
Public Notice
OTHER
|
Mar 19, 2015 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2014 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2002 | Active |
Full record since 1990
EPA's records for Costilla MDWCA go back to 1990. Before October 19, 2016 they list 14 health-based violations (13 resolved, 1 not resolved) and 32 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 9 |
| 2000s | 4 | 4 |
| 2010 to October 18, 2016 | 9 | 19 |
| October 19, 2016 to 2019 | 0 | 11 |
| 2020s | 5 | 18 |
Most recent health-based violation before October 19, 2016: Groundwater Rule, began January 2016, Resolved.
Show all 14 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
Jan 13, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jan 13, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jan 13, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jan 13, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jan 13, 2016 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2014 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jan 13, 2013 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Oct 17, 2012 | Active |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1996 | Resolved |
Enforcement actions
EPA took 1 formal enforcement action against Costilla MDWCA in 1992. The most recent was a compliance order (no penalty) in December 1992.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 17, 1992 | EPA | Compliance order (no penalty) | 9 violations: Coliform (Pre-TCR), Total Coliform |
What the violations mean
Groundwater Rule
7 incidentsThe 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 incidentThe 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
Costilla MDWCA draws water from 2 wells.
Annual water quality report
Costilla 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.
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 Costilla MDWCA 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