Public water system record
Llano Grande Lake Park East
Serves Mercedes, Hidalgo County, TX · 1,300 people served
Federal records show 6 health-based violations and 47 monitoring/reporting issues for Llano Grande Lake Park East in the last ten years, including an unresolved Lead and Copper Rule violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 3
- Unresolved
- 3
- Any acute record
- No
- Monitoring issues, last 10 years
- 47
Key facts
- Llano Grande Lake Park East buys its water from City of Mercedes.
- Most recent formal enforcement: compliance order with a penalty by Texas, January 2020.
- Record on file since 2013, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 474 service lines.
Check whether Llano Grande Lake Park East 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
Treatment technique failure
|
350 | Oct 1, 2022 | Active | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Apr 1, 2022 | Active | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Mar 31, 2022 | Active | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Oct 1, 2019 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Apr 1, 2019 | Resolved | No |
|
Lead and Copper Rule
Treatment technique failure
|
350 | Mar 31, 2019 | 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
|
Sep 29, 2025 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 29, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Mar 31, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 29, 2023 | Resolved |
|
Public Notice
OTHER
|
Aug 17, 2023 | Resolved |
|
Public Notice
OTHER
|
Aug 13, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Public Notice
OTHER
|
May 11, 2023 | Resolved |
|
Nitrite
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Dec 4, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Public Notice
OTHER
|
Jun 11, 2022 | Resolved |
|
Public Notice
OTHER
|
Jun 11, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2021 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2020 | Resolved |
|
Public Notice
OTHER
|
Sep 6, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Public Notice
OTHER
|
May 30, 2020 | Resolved |
|
Public Notice
OTHER
|
May 14, 2020 | Resolved |
|
Public Notice
OTHER
|
May 14, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Mar 31, 2020 | Resolved |
|
Public Notice
OTHER
|
Dec 13, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 29, 2019 | Resolved |
|
Public Notice
OTHER
|
Jun 13, 2019 | Resolved |
|
Public Notice
OTHER
|
Jun 13, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2018 | Resolved |
|
Public Notice
OTHER
|
Oct 26, 2018 | Resolved |
|
Public Notice
OTHER
|
Oct 25, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2018 |
Active
Enforcement action in place
|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2016 | Resolved |
|
Public Notice
OTHER
|
Apr 29, 2015 | Resolved |
|
Public Notice
OTHER
|
Apr 29, 2015 | Resolved |
Full record since 2013
EPA's records for Llano Grande Lake Park East go back to 2013. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 7 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2010 to October 18, 2016 | 5 | 7 |
| October 19, 2016 to 2019 | 3 | 15 |
| 2020s | 3 | 30 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2015, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2013 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jan 1, 2013 | Resolved |
Enforcement actions
Texas regulators took 2 formal enforcement actions against Llano Grande Lake Park East between 2016 and 2020. The most recent was a compliance order with a penalty in January 2020.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 14, 2020 | Texas | Compliance order with a penalty | 11 violations (3 health-based): Lead and Copper Rule, Consumer Confidence Rule |
| Aug 24, 2016 | Texas | Compliance order (no penalty) | 3 violations (3 health-based): Total Trihalomethanes (TTHMs) |
What the violations mean
Lead and Copper Rule
6 incidentsThe system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Llano Grande Lake Park East buys its water from City of Mercedes. It lists no wells or intakes of its own.
Buys water from
- City of Mercedes Mercedes, TX
Annual water quality report
Llano Grande Lake Park East 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