PWSID TX2530004
SIESTA SHORES WCID
Community water system based in Zapata, TX
Service area on file with EPA: Zapata County. EPA's recorded service area can be incomplete for regional authorities. The cities and counties above are what the utility has filed with EPA; the utility may serve additional areas.
- Population served
- 1,842
- Source
- Surface water
- Status
- Active
At a glance
1 issue above the federal safety limit
-
Confirmed lead service lines were found in this system's inventory. Lead can leach into drinking water as it passes through these pipes.
From the utility's published inventory · See details below
-
CDC's My Water's Fluoride listing does not report this system as fluoridating its drinking water.
Per CDC My Water's Fluoride · See details below
Risk classification follows EPA's published values for safe drinking water, with caution and concern bands reviewed by a clinician. Past resolved violations do not influence this card. See methodology.
Lead service line inventory
Lead or galvanized-requiring-replacement service lines confirmed in this system
SIESTA SHORES WCID reports 1 confirmed lead service line, 700 non-lead, 0 unknown (total 701) in the EPA SDWIS service line inventory (2026Q1).
- 1 confirmed lead service line
- 0 galvanized requiring replacement (LCRI treats these as lead)
- 0 unknown (0.0% of total)
- 700 confirmed non-lead (99.9%)
- 701 total service lines in the system
Why this is a health concern. A galvanized iron service line that was ever installed downstream of a historic lead component (a lead service line, a lead gooseneck connector, or lead solder) absorbed lead into its corrosion layer over decades. The pipe continues to release that accumulated lead into water for years after the upstream lead source is removed. That is why EPA's LCRI treats GRR lines as lead and requires their replacement on the same 10-year schedule as confirmed lead lines. Read our plain-English lead guide.
What to do if your service line might be lead
- Ask your utility to check the service-line classification for your specific address. Many utilities provide a public address-lookup tool linked from the inventory page.
- Get on the replacement queue. Under the LCRI, utilities must replace all lead and galvanized-requiring- replacement lines within 10 years (clock generally starts November 2027). Some prioritize requests.
- Until the line is replaced: flush the tap 30 seconds after long stagnation, use cold water for drinking and cooking, and consider an NSF/ANSI 53 lead-rated tap filter.
- Talk to your clinician about a blood lead test for anyone in the home, especially a pregnant person or a child under 6. Lead in drinking water guide.
Inventory data sourced from SIESTA SHORES WCID ( retrieved May 24, 2026 ; curator confidence: high ). Confirmed against the original source automatically each month; see methodology.
Lead and copper test results
The most recent measurement per contaminant from EPA's Lead and Copper Rule sampling.
Why only lead and copper, and not arsenic, nitrate, or others?
EPA's bulk SDWIS download is the only nationwide per-system sample data they publish, and it only includes the Lead and Copper Rule table. Values for other regulated contaminants (TTHMs, nitrate, arsenic, etc.) appear on this page only when they trigger a violation. For the full per-system contaminant suite, see the utility's annual Consumer Confidence Report (link further down the page).
| Contaminant | Most recent | Date | Risk |
|---|---|---|---|
| PB90 | 0 mg/L | June 30, 2025 | Below regulatory thresholds |
Data from EPA SDWIS (Lead and Copper Rule sample table) , last refreshed May 24, 2026.
Fluoride
Per CDC My Water's Fluoride
SIESTA SHORES WCID does not add fluoride to its drinking water.
This system has not reported adding fluoride to its water on CDC's My Water's Fluoride listing. Natural fluoride may still be present at trace levels from the source water; the utility's annual water quality report has the latest measured concentration.
Source: CDC My Water's Fluoride, listed under SIESTA SHORES WCID (Zapata County). Verify on CDC's site .
Area context
Zapata County, TX (2020 data)
- Community water systems
- 1 of 4 add fluoride
- Population on fluoridated water
- 672 of 14,557 (4.6%)
Texas statewide (2020 data)
- Population on fluoridated water
- 19,743,163 of 27,818,869 (71.0%)
- Community water systems adding fluoride
- 2,573 of 6,046
Data from CDC My Water's Fluoride (per-system status) , last refreshed May 19, 2026.
Data from CDC Water Fluoridation Reporting System (state and county aggregates) , last refreshed May 16, 2026.
Compliance history
EPA-recorded violations against this system over the last 5 years.
How to read this section
Health-based violations are when a measured limit was exceeded; the measured concentration is shown alongside the EPA federal limit where SDWIS published it. Monitoring and reporting items are paperwork issues (missed sample dates, late filings) that do not themselves indicate unsafe water.
No health-based violations
No health-based violations on file in the last 5 years. EPA recorded 26 monitoring or reporting items (paperwork) during the same period.
26 monitoring and reporting item s (paperwork) , 1 still open · these are not health risks
| Period start | Relates to | Item | Status |
|---|---|---|---|
| July 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| July 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| July 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| July 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| January 25, 2024 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | Resolved |
| January 25, 2024 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | Resolved |
| January 25, 2024 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | Resolved |
| January 25, 2024 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | Resolved |
| January 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| January 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| January 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| January 1, 2024 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| December 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| December 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| December 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| December 1, 2023 | Revised Total Coliform Rule | Monitoring, Routine (RTCR) | Resolved |
| September 29, 2023 | Lead and Copper Rule | Lead Consumer Notice | Unaddressed |
| December 19, 2022 | Public Notice | Public Notification Violation for NPDWR Violation | Resolved |
| October 1, 2022 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2022 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2022 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2022 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2021 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2021 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2021 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
| October 1, 2021 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | Resolved |
188 older violation s (5-10 years ago) · 69 health-based, 119 paperwork , 4 still open
| Period start | Relates to | Item | Measured level | Status |
|---|---|---|---|---|
| June 4, 2020 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| May 28, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| May 28, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| May 28, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| May 28, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.095 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.095 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.095 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.095 MG/L
MCL 0.080 MG/L | Resolved |
| January 21, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| January 21, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| January 21, 2020 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| January 11, 2020 | Public Notice | Public Notification Violation for NPDWR Violation | — | Unaddressed |
| January 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.092 MG/L
MCL 0.080 MG/L | Resolved |
| January 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.092 MG/L
MCL 0.080 MG/L | Resolved |
| January 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.092 MG/L
MCL 0.080 MG/L | Resolved |
| January 1, 2020 | Tthm | Maximum Contaminant Level Violation, Average | 0.092 MG/L
MCL 0.080 MG/L | Resolved |
| November 22, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 22, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| October 1, 2019 | Tthm | Maximum Contaminant Level Violation, Average | 0.097 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2019 | Tthm | Maximum Contaminant Level Violation, Average | 0.097 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2019 | Tthm | Maximum Contaminant Level Violation, Average | 0.097 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2019 | Tthm | Maximum Contaminant Level Violation, Average | 0.097 MG/L
MCL 0.080 MG/L | Resolved |
| August 26, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 26, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 12, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 12, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 12, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Unaddressed |
| August 3, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 3, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 3, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| August 3, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 12, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Unaddressed |
| March 7, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 7, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 7, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 7, 2019 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| December 30, 2018 | Lead and Copper Rule | Lead Consumer Notice | — | Resolved |
| December 30, 2018 | Lead and Copper Rule | Lead Consumer Notice | — | Resolved |
| December 22, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Unaddressed |
| November 26, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 26, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 22, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 22, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| October 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| October 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| October 25, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| October 25, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| July 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| July 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| July 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| July 5, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 5, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| July 1, 2018 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| July 1, 2018 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| July 1, 2018 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| July 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| July 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| July 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| July 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| July 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.087 MG/L
MCL 0.080 MG/L | Resolved |
| July 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.087 MG/L
MCL 0.080 MG/L | Resolved |
| July 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.087 MG/L
MCL 0.080 MG/L | Resolved |
| July 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.087 MG/L
MCL 0.080 MG/L | Resolved |
| June 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| June 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| June 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| June 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| May 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| May 30, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| May 3, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| May 3, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| May 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| May 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| May 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| May 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| April 26, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Tthm | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 26, 2018 | Total Haloacetic Acids (Haa5) | Failure Submit IDSE/Subpart V Plan Rpt | — | Resolved |
| April 1, 2018 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| April 1, 2018 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| April 1, 2018 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| April 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| April 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| April 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| April 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| April 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.121 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.121 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.121 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.121 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.073 MG/L
MCL 0.060 MG/L | Resolved |
| April 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.073 MG/L
MCL 0.060 MG/L | Resolved |
| April 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.073 MG/L
MCL 0.060 MG/L | Resolved |
| April 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.073 MG/L
MCL 0.060 MG/L | Resolved |
| March 31, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 31, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 3, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 3, 2018 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| March 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| February 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.071 MG/L
MCL 0.060 MG/L | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.071 MG/L
MCL 0.060 MG/L | Resolved |
| January 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.071 MG/L
MCL 0.060 MG/L | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| January 1, 2018 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.071 MG/L
MCL 0.060 MG/L | Resolved |
| January 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.100 MG/L
MCL 0.080 MG/L | Resolved |
| January 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.100 MG/L
MCL 0.080 MG/L | Resolved |
| January 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.100 MG/L
MCL 0.080 MG/L | Resolved |
| January 1, 2018 | Tthm | Maximum Contaminant Level Violation, Average | 0.100 MG/L
MCL 0.080 MG/L | Resolved |
| December 30, 2017 | Lead and Copper Rule | Lead Consumer Notice | — | Resolved |
| December 30, 2017 | Lead and Copper Rule | Lead Consumer Notice | — | Resolved |
| December 1, 2017 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| December 1, 2017 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 16, 2017 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 16, 2017 | Public Notice | Public Notification Violation for NPDWR Violation | — | Resolved |
| November 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| November 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| November 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| November 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.093 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.093 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2017 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| October 1, 2017 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| October 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.093 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monitoring, Turbidity (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.093 MG/L
MCL 0.080 MG/L | Resolved |
| October 1, 2017 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| October 1, 2017 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| October 1, 2017 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| October 1, 2017 | Carbon, Total | Monitoring and Reporting (DBP) | — | Resolved |
| October 1, 2017 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.062 MG/L
MCL 0.060 MG/L | Resolved |
| October 1, 2017 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.062 MG/L
MCL 0.060 MG/L | Resolved |
| October 1, 2017 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.062 MG/L
MCL 0.060 MG/L | Resolved |
| October 1, 2017 | Total Haloacetic Acids (Haa5) | Maximum Contaminant Level Violation, Average | 0.062 MG/L
MCL 0.060 MG/L | Resolved |
| October 1, 2017 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| October 1, 2017 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| October 1, 2017 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| October 1, 2017 | Lead and Copper Rule | Follow-up Or Routine LCR Tap M/R | — | Resolved |
| July 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.081 MG/L
MCL 0.080 MG/L | Resolved |
| July 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.081 MG/L
MCL 0.080 MG/L | Resolved |
| July 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.081 MG/L
MCL 0.080 MG/L | Resolved |
| July 1, 2017 | Tthm | Maximum Contaminant Level Violation, Average | 0.081 MG/L
MCL 0.080 MG/L | Resolved |
| April 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| April 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| April 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| April 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| April 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
| April 1, 2017 | Interim Enhanced Surface Water Treatment Rule | Monthly Turbidity Exceed (Enhanced SWTR) | — | Resolved |
Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.
Where to see every contaminant this utility tested for
EPA's bulk SDWIS dataset gives MyTapWater.us per-system measured values for lead and copper, plus violation records for everything else. To see every regulated contaminant this utility tested for in the past year (TTHMs, HAA5, nitrate, arsenic, fluoride, chromium, etc.) with measured values, read the utility's Consumer Confidence Report (CCR).
Every community water system is required by EPA to publish a CCR annually, by July 1, listing every contaminant they sampled, the measured value, the federal limit, and any health-based exceedances. Most utilities post the report online; some mail it with your bill.
How to find SIESTA SHORES WCID's CCR:
- Search the web for "SIESTA SHORES WCID consumer confidence report" . The PDF is usually on the utility's own website.
- Or call the utility directly. Their phone number is in the contact section below.
Other water systems in Zapata County, TX
Compare nearby utilities by population served.
- ZAPATA COUNTY WATERWORKS SWTP
14k served · Zapata County
- ZAPATA COUNTY SAN YGNACIO AND RAMIRENO
1,254 served · Zapata County
- ZAPATA COUNTY WCID HWY 16 EAST
243 served · Zapata County
Contact this utility
Public administrative contact information for this water system, as filed with the EPA. Use this to ask about your service line, request your home's lead status, or report a water quality issue.
- Administrator
- GARCIA, MANUEL
- Phone
- 956-765-4988
- sswcid@yahoo.com
- Mailing address
- PO BOX 321ZAPATA, TX 78076-0321
Where this page's data comes from
Bundle released 2026-Q2, regenerated May 24, 2026. Each section above also shows its own source date so you can tell at a glance how fresh that part of the page is.
- EPA SDWIS bulk download — last refreshed May 24, 2026 (system info, violations, lead and copper samples).
- Lead service line inventory — last refreshed May 24, 2026 (from the utility's reported inventory).
- CDC My Water's Fluoride — last refreshed May 19, 2026 (per-system Yes/No fluoridation status).
- CDC Water Fluoridation Reporting System — last refreshed May 16, 2026 (state and county fluoridation aggregates).
Every value on this page is cross-verified before publication; read our methodology for the verification steps and corrections process.