SIESTA SHORES WCID
PWS ID: TX2530004 · ZAPATA, Texas 78076-0321
SIESTA SHORES WCID serves 1,842 people in ZAPATA, Texas using Surface Water water sources. It has 258 recorded EPA violations, including 69 health-based violations. No PFAS contamination was detected in UCMR5 testing.
Water Quality Snapshot: SIESTA SHORES WCID
SIESTA SHORES WCID is a local-owned community water system that delivers drinking water to 1,842 residents in ZAPATA, Texas (Zapata County) through 614 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 258 total violations for this system , of which 69 (27%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 115 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.
The most frequently cited contaminant at this system is Public Notice, recorded in 51 violations (Other). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.
Across Texas, EPA tracks 7,351 public water systems serving 33,253,313 people, with 746,210 cumulative violations and 162,945 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 101.5 violations. SIESTA SHORES WCID's 258 violations sit above the Texas average. Statewide, 1,068 of 1,147 UCMR5-tested systems have reported PFAS detections (93.1%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 614
- County
- Zapata
- School/Daycare
- No
- MCL Violations
- 44
- Monitoring Violations
- 115
- Treatment Tech Violations
- 25
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Public Notice | Other | 51 | 2022 |
| Interim Enhanced Surface Water Treatment Rule | MR | 37 | 2018 |
| TTHM | MCL | 32 | 2020 |
| Lead and Copper Rule | MR | 26 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | TT | 25 | 2018 |
| TTHM | MR | 19 | 2024 |
| CARBON, TOTAL | MR | 12 | 2018 |
| Total Haloacetic Acids (HAA5) | MCL | 12 | 2018 |
| Coliform (TCR) | MR | 8 | 2015 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2018 |
| Revised Total Coliform Rule | MON | 4 | 2023 |
| Surface Water Treatment Rule | MR | 1 | 2003 |
Verify This Water System
The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for SIESTA SHORES WCID.
EPA SDWIS — Federal Reports
EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:
View PWS ID TX2530004 on SDWISSource: EPA SDWIS Federal Reports Search
Texas Drinking Water Authority
Texas Commission on Environmental Quality (TCEQ) — Drinking Water Watch is the primacy agency that licenses and inspects SIESTA SHORES WCID under EPA-delegated authority.
Open TX regulator portalSource: Texas Commission on Environmental Quality (TCEQ) — Drinking Water Watch
Violation Timeline
Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.
| Year (latest) | Contaminant | Category | Count | EPA Record |
|---|---|---|---|---|
| 2024 | Lead and Copper Rule | MR | 26 | SDWIS / TX2530004 / 5000 |
| 2024 | TTHM | MR | 19 | SDWIS / TX2530004 / 2950 |
| 2023 | Revised Total Coliform Rule | MON | 4 | SDWIS / TX2530004 / 8000 |
| 2022 | Public Notice | Other | 51 | SDWIS / TX2530004 / 7500 |
| 2020 | TTHM | MCL | 32 | SDWIS / TX2530004 / 2950 |
| 2018 | Interim Enhanced Surface Water Treatment Rule | MR | 37 | SDWIS / TX2530004 / 0300 |
| 2018 | Interim Enhanced Surface Water Treatment Rule | TT | 25 | SDWIS / TX2530004 / 0300 |
| 2018 | CARBON, TOTAL | MR | 12 | SDWIS / TX2530004 / 2920 |
| 2018 | Total Haloacetic Acids (HAA5) | MCL | 12 | SDWIS / TX2530004 / 2456 |
| 2018 | Total Haloacetic Acids (HAA5) | MR | 8 | SDWIS / TX2530004 / 2456 |
| 2015 | Coliform (TCR) | MR | 8 | SDWIS / TX2530004 / 3100 |
| 2003 | Surface Water Treatment Rule | MR | 1 | SDWIS / TX2530004 / 0200 |
How SIESTA SHORES WCID Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | SIESTA SHORES WCID | Texas avg | Federal benchmark |
|---|---|---|---|
| Total violations | 258 | 101.5 | SDWA compliance — any non-zero count is a recorded breach |
| Health-based violations | 69 | 22.2 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | None | 93.1% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 1,842 | 4,524 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,351 regulated public water systems in Texas.
Federal MCL reference — Safe Drinking Water Act thresholds ▼
| Contaminant | Federal MCL / Action Level | Note |
|---|---|---|
| Lead | 0 mg/L (Action Level: 0.015 mg/L) | Lead and Copper Rule treatment technique |
| Arsenic | 0.010 mg/L (10 ppb) | Health-based MCL since 2006 |
| Total Coliform | Treatment technique (RTCR) | Indicator organism, monitoring trigger |
| PFOA / PFOS (PFAS) | 4.0 ppt each (final 2024 rule) | Compliance deadline 2029 |
| Nitrate (as N) | 10 mg/L | Acute health risk for infants |
Frequently Asked Questions
Is SIESTA SHORES WCID water safe to drink? ▼
How many people does SIESTA SHORES WCID serve? ▼
What type of violations does SIESTA SHORES WCID have? ▼
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Related Data for Texas
Read our methodology — how this data is sourced, computed, and verified.