Public water system record
Siesta Shores WCID
Serves Siesta Shores, Zapata County, TX · 1,842 people served
Federal records show 16 health-based violations and 56 monitoring/reporting issues for Siesta Shores WCID in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 16
- Resolved
- 16
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 56
Key facts
- Siesta Shores WCID draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.121 mg/L, federal limit 0.08 mg/L (1.5 times the limit), 2018.
- Most recent formal enforcement: compliance order with a penalty by Texas, July 2018.
- Record on file since 2003, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 1 lead and 0 unknown out of 701 service lines.
Check whether Siesta Shores WCID 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 |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Apr 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Jan 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Oct 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2018 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.121 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2018 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 1, 2018 | Resolved | Yes |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2018 | Resolved | Yes |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2017 | Resolved | Yes |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 1, 2017 | Resolved | Yes |
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
|
Jul 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 25, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Sep 29, 2023 | Active |
|
Public Notice
OTHER
|
Dec 19, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Jun 4, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
May 28, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 21, 2020 | Resolved |
|
Public Notice
OTHER
|
Jan 11, 2020 | Active |
|
Public Notice
OTHER
|
Nov 22, 2019 | Resolved |
|
Public Notice
OTHER
|
Aug 26, 2019 | Resolved |
|
Public Notice
OTHER
|
Aug 12, 2019 | Active |
|
Public Notice
OTHER
|
Aug 12, 2019 | Resolved |
|
Public Notice
OTHER
|
Aug 3, 2019 | Resolved |
|
Public Notice
OTHER
|
Aug 3, 2019 | Resolved |
|
Public Notice
OTHER
|
Mar 12, 2019 | Active |
|
Public Notice
OTHER
|
Mar 7, 2019 | Resolved |
|
Public Notice
OTHER
|
Mar 7, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2018 | Resolved |
|
Public Notice
OTHER
|
Dec 22, 2018 | Active |
|
Public Notice
OTHER
|
Nov 26, 2018 | Resolved |
|
Public Notice
OTHER
|
Nov 22, 2018 | Resolved |
|
Public Notice
OTHER
|
Oct 30, 2018 | Resolved |
|
Public Notice
OTHER
|
Oct 25, 2018 | Resolved |
|
Public Notice
OTHER
|
Jul 30, 2018 | Resolved |
|
Public Notice
OTHER
|
Jul 30, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 5, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 5, 2018 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2018 | Resolved |
|
Public Notice
OTHER
|
May 30, 2018 | Resolved |
|
Public Notice
OTHER
|
May 3, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 26, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 26, 2018 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Apr 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Public Notice
OTHER
|
Mar 31, 2018 | Resolved |
|
Public Notice
OTHER
|
Mar 3, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 30, 2017 | Resolved |
|
Public Notice
OTHER
|
Dec 1, 2017 | Resolved |
|
Public Notice
OTHER
|
Nov 16, 2017 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2017 | Resolved |
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
CARBON, TOTAL
Monitoring and reporting
|
Oct 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Public Notice
OTHER
|
Feb 10, 2016 | Resolved |
|
Public Notice
OTHER
|
Apr 12, 2013 | Resolved |
Full record since 2003
EPA's records for Siesta Shores WCID go back to 2003. Before October 19, 2016 they list no health-based violations and 7 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 2 |
| 2010 to October 18, 2016 | 0 | 5 |
| October 19, 2016 to 2019 | 14 | 42 |
| 2020s | 2 | 12 |
Enforcement actions
Texas regulators took 1 formal enforcement action against Siesta Shores WCID in 2018. The most recent was a compliance order with a penalty in July 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jul 31, 2018 | Texas | Compliance order with a penalty | 6 violations (4 health-based): Public Notice, Interim Enhanced Surface Water Treatment Rule |
What the violations mean
Total Trihalomethanes (TTHMs)
8 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Interim Enhanced Surface Water Treatment Rule
5 incidentsThe system did not meet a filtration or treatment requirement for surface water
Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through
Haloacetic Acids (HAA5)
3 incidentsHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Where the water comes from
Siesta Shores WCID draws water from 1 surface water intake.
Annual water quality report
Siesta Shores WCID 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