Public water system record
Shamrock Municipal Water System
Serves Shamrock, Wheeler County, TX · 2,311 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for Shamrock Municipal Water System in the last ten years. The most serious issue in this window was a resolved Nitrate violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 1
Key facts
- Shamrock Municipal Water System draws water from 8 wells.
- Highest measured level in the last 10 years: Nitrate, 11 mg/L, federal limit 10 mg/L (1.1 times the limit), 2022.
- Most recent enforcement action: boil water order by Texas, January 2012.
- Record on file since 1991, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 1,489 service lines.
Check whether Shamrock Municipal Water System 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 |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jul 1, 2022 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2025 | Resolved |
Full record since 1991
EPA's records for Shamrock Municipal Water System go back to 1991. Before October 19, 2016 they list 6 health-based violations (5 resolved, 1 archived by EPA without a recorded fix) and 30 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 1 |
| 2000s | 3 | 15 |
| 2010 to October 18, 2016 | 2 | 14 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began October 2015, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2009 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13.5 mg/L, federal limit 10 mg/L (1.4 times the limit)
|
Jul 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1991 | Archived |
Enforcement actions
Texas regulators issued 1 boil water order to Shamrock Municipal Water System in 2012, filed as 2 records in EPA's data. The most recent was a boil water order in January 2012.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 26, 2012 | Texas | Boil water order | 2 violations: Public Notice |
What the violations mean
Nitrate
1 incidentNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
Shamrock Municipal Water System draws water from 8 wells.
Annual water quality report
Shamrock Municipal Water System 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 Texas.
Certified drinking water labs by state EPA guidance for private wells