City of La Marque
EPA ID: TX0840006 · 15,154 people served · 5 ZIP codes
ZipCheckup's reading of EPA SDWIS for City of La Marque (TX0840006): 4 unresolved EPA violations on record. Tallying the federal enforcement file for City of La Marque yields 4 open violations that have not been formally closed - each finding sits in the EPA database while the utility continues to deliver water to approximately 15,154 residents and works through the required corrective action process.
Data: EPA SDWIS
Service Area Map
Coverage area for City of La Marque Source: EPA SDWIS service area boundaries.
Service area boundary - Grade B
Service Area Demographics
The City of La Marque serves a community with a median household income of $80,199 and an estimated 88,386 residents across its service area. Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 42% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
City of La Marque's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How City of La Marque compares to EPA limits
What This Means For You
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 17 detections recorded.
Comparable Water Systems
Similar-sized systems in Texas
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
City of La Marque (EPA ID: TX0840006) is a community water system in Texas that serves approximately 15,154 people from surface water sources.
This system provides water to 5 ZIP codes across 5 communities.
ZIP-Area Home Safety Context: B (83/100)
This is the average Home Safety Score for 1 of 5 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 0 archived, 0 addressed, and 4 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| December 30, 2025 | Stage 1 DBP Rule | Non-health-based | Unaddressed (current) |
| July 2, 2025 | Stage 2 DBP Rule | Non-health-based | Unaddressed (current) |
| July 1, 2025 | Surface Water Treatment Rule | Non-health-based | Unaddressed (current) |
| July 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| October 1, 2023 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
| September 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 1 | No |
| Stage 2 DBP Rule | Treatment Failure | 1 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
| Consumer Confidence Report Rule | Reporting Failure | 1 | No |
| Revised Total Coliform Rule | Microbiological | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.000579 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by TX or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of La Marque (TX0840006) on EPA.gov.
Frequently Asked Questions
Is City of La Marque water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 4 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does City of La Marque serve?
City of La Marque serves approximately 15,154 people across 5 ZIP codes in Texas.
Where does City of La Marque get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). City of La Marque (TX): 6 EPA Violations. https://zipcheckup.com/water-system/tx0840006/
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author = {{ZipCheckup}},
title = {{City of La Marque (TX): 6 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/tx0840006/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
City of La Marque (EPA ID: TX0840006) - request the latest Consumer Confidence Report or ask about specific contaminants.