Public water system record
Coal Basin Dwua
Serves an area of McKinley County, NM that includes Gallup · 116 people served
Federal records show 10 health-based violations and 18 monitoring/reporting issues for Coal Basin Dwua in the last ten years, including an unresolved Groundwater Rule violation.
System profile
- Health-based violations, last 10 years
- 10
- Resolved
- 7
- Unresolved
- 3
- Any acute record
- No
- Monitoring issues, last 10 years
- 18
Key facts
- Coal Basin Dwua draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by New Mexico, May 2008.
- Record on file since 1983, with 12 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 4 unknown out of 28 service lines.
Check whether Coal Basin Dwua 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 |
|---|---|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 23, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 23, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 23, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 23, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 23, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 16, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 16, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Apr 30, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Apr 30, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 2, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2025 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Jun 8, 2020 | Resolved |
|
Public Notice
OTHER
|
May 21, 2020 | Resolved |
|
Groundwater Rule
OTHER
|
Jul 21, 2019 | Resolved |
|
Public Notice
OTHER
|
Feb 13, 2019 | Resolved |
|
Public Notice
OTHER
|
Mar 19, 2018 | Resolved |
|
Public Notice
OTHER
|
Mar 15, 2018 | Resolved |
|
Public Notice
OTHER
|
Oct 8, 2017 | Resolved |
|
Groundwater Rule
OTHER
|
Feb 2, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Public Notice
OTHER
|
Aug 12, 2016 | Resolved |
|
Public Notice
OTHER
|
Mar 6, 2016 | Resolved |
|
Public Notice
OTHER
|
Apr 24, 2014 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2001 | Active |
Full record since 1983
EPA's records for Coal Basin Dwua go back to 1983. Before October 19, 2016 they list 12 health-based violations (11 resolved, 1 archived by EPA without a recorded fix) and 56 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 0 |
| 2000s | 11 | 33 |
| 2010 to October 18, 2016 | 0 | 23 |
| October 19, 2016 to 2019 | 5 | 6 |
| 2020s | 5 | 5 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2008, Resolved.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2000 | Resolved |
|
Selenium
Contaminant limit exceeded
|
Apr 28, 1983 | Archived |
Enforcement actions
New Mexico regulators took 1 formal enforcement action against Coal Basin Dwua in 2008. The most recent was a compliance order (no penalty) in May 2008.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 27, 2008 | New Mexico | Compliance order (no penalty) | 15 violations (8 health-based): Total Coliform, Chlorine |
What the violations mean
Groundwater Rule
10 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.
Where the water comes from
Coal Basin Dwua draws water from 1 well.
Annual water quality report
Coal Basin Dwua 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 Coal Basin Dwua 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