Public water system record
Alcalde MDWCA
Serves Alcalde, La Villita and Los Luceros, Rio Arriba County, NM · 927 people served
Federal records show 20 health-based violations and 15 monitoring/reporting issues for Alcalde MDWCA in the last ten years. The most serious issue in this window was a Arsenic violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 20
- Resolved
- 11
- Unresolved
- 0
- Archived by EPA
- 9
- Any acute record
- No
- Monitoring issues, last 10 years
- 15
Key facts
- Alcalde MDWCA draws water from 5 wells.
- Highest measured level in the last 10 years: Arsenic, 0.074 mg/L, federal limit 0.01 mg/L (7.4 times the limit), 2024.
- Most recent formal enforcement: compliance order (no penalty) by New Mexico, May 2024.
- Record on file since 1993, with 10 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 329 unknown out of 329 service lines.
Check whether Alcalde 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 |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
330 | Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.026 mg/L, federal limit 0.01 mg/L (2.6 times the limit)
|
330 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.068 mg/L, federal limit 0.01 mg/L (6.8 times the limit)
|
330 | Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.074 mg/L, federal limit 0.01 mg/L (7.4 times the limit)
|
330 | Jul 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.073 mg/L, federal limit 0.01 mg/L (7.3 times the limit)
|
330 | Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.06 mg/L, federal limit 0.01 mg/L (6 times the limit)
|
330 | Jan 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
330 | Oct 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
330 | Jul 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.025 mg/L, federal limit 0.01 mg/L (2.5 times the limit)
|
330 | Oct 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.027 mg/L, federal limit 0.01 mg/L (2.7 times the limit)
|
330 | Jul 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.027 mg/L, federal limit 0.01 mg/L (2.7 times the limit)
|
330 | Apr 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.024 mg/L, federal limit 0.01 mg/L (2.4 times the limit)
|
330 | Jan 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Apr 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.022 mg/L, federal limit 0.01 mg/L (2.2 times the limit)
|
330 | Jan 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.026 mg/L, federal limit 0.01 mg/L (2.6 times the limit)
|
330 | Oct 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
330 | Jul 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.014 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
330 | Apr 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jan 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.048 mg/L, federal limit 0.01 mg/L (4.8 times the limit)
|
330 | Oct 1, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Mar 18, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Public Notice
OTHER
|
May 25, 2018 | Resolved |
|
Public Notice
OTHER
|
Jan 31, 2018 | Resolved |
|
Public Notice
OTHER
|
Dec 14, 2017 | Resolved |
|
Public Notice
OTHER
|
Dec 14, 2017 | Resolved |
|
Public Notice
OTHER
|
Nov 14, 2017 | Resolved |
|
Public Notice
OTHER
|
Jul 29, 2017 | Resolved |
|
Public Notice
OTHER
|
Jun 12, 2017 | Resolved |
|
Public Notice
OTHER
|
May 25, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2014 | Resolved |
Full record since 1993
EPA's records for Alcalde MDWCA go back to 1993. Before October 19, 2016 they list 10 health-based violations (10 resolved) and 31 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 3 |
| 2000s | 2 | 19 |
| 2010 to October 18, 2016 | 8 | 9 |
| October 19, 2016 to 2019 | 10 | 11 |
| 2020s | 9 | 3 |
Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Resolved.
Show all 10 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.048 mg/L, federal limit 0.01 mg/L (4.8 times the limit)
|
Oct 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.055 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
|
Jul 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.053 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
|
Apr 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.05 mg/L, federal limit 0.01 mg/L (5 times the limit)
|
Jan 1, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jul 10, 2015 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jun 1, 2013 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
May 10, 2012 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
May 10, 2012 | Resolved |
|
Fluoride
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Fluoride
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
Enforcement actions
New Mexico regulators took 1 formal enforcement action against Alcalde MDWCA in 2024. The most recent was a compliance order (no penalty) in May 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 6, 2024 | New Mexico | Compliance order (no penalty) | 9 violations (9 health-based): Arsenic |
What the violations mean
Arsenic
20 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Alcalde MDWCA draws water from 5 wells.
Annual water quality report
Alcalde 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