Public water system record
Arroyo Seco MDWCA
Serves Arroyo Seco, Taos County, NM · 444 people served
Federal records show 1 health-based violation and 14 monitoring/reporting issues for Arroyo Seco MDWCA in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 14
Key facts
- Arroyo Seco MDWCA draws water from 2 wells.
- Most recent formal enforcement: compliance order (no penalty) by EPA, September 2000.
- Record on file since 1990, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 104 unknown out of 104 service lines.
Check whether Arroyo Seco 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 | Resolved | 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 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2024 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Sep 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Sep 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2015 | Resolved |
Full record since 1990
EPA's records for Arroyo Seco MDWCA go back to 1990. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 43 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 17 |
| 2000s | 2 | 19 |
| 2010 to October 18, 2016 | 0 | 7 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 1 | 11 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2002, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2002 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Aug 1, 1995 | Resolved |
Enforcement actions
EPA took 2 formal enforcement actions against Arroyo Seco MDWCA between 1996 and 2000. The most recent was a compliance order (no penalty) in September 2000.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 22, 2000 | EPA | Compliance order (no penalty) | 2 violations: Consumer Confidence Rule |
| Oct 17, 1996 | EPA | Compliance order (no penalty) | 4 violations (1 health-based): Total Coliform |
What the violations mean
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
Arroyo Seco MDWCA draws water from 2 wells.
Annual water quality report
Arroyo Seco 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 Arroyo Seco 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