Water Quality in La Coste, TX: No Violations - Grade A
Grade A · Score 90/100 · 9 water systems · Updated 2026-07-18
La Coste's water meets all EPA standards with no health-based violations.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-07-18
Zero EPA violations on record for La Coste, TX - the 9 public water systems tracked here have met every federal contaminant limit, cleared every monitoring requirement, and drawn no enforcement actions from the agency across the full compliance dataset.
Water Quality by ZIP Code in La Coste
La Coste is covered by a single ZIP code, so one water-quality profile applies citywide. See the contaminant data below.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 78039 | A | 90 | 0 | 0 | View report → |
Violation Trend
EPA violations recorded for water systems serving La Coste.
Water Quality Overview
La Coste, Texas receives a water quality grade of A with an overall score of 90 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 9 water systems serving La Coste. This is a positive indicator, though it does not guarantee the absence of all contaminants - some substances (like PFAS) are not yet fully regulated.
What Grade A Means
A grade of A indicates excellent compliance with EPA drinking water standards. La Coste's water systems have maintained strong performance in both contaminant monitoring and regulatory compliance.
Lead Levels
The average 90th percentile lead level across La Coste water systems is 0.0046 mg/L - within EPA limits. No ZIP codes exceed the EPA lead action level.
Water Systems Serving La Coste
La Coste is served by 9 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 2,311 people across 1 ZIP code.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving La Coste. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in La Coste
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving La Coste:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 3 | 3 |
| 2022 | 4 | 4 |
| 2023 | 2 | 2 |
Violations have decreased from 3 in 2021 to 2 in 2023, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving La Coste. Recent actions:
| Date | Action Type |
|---|---|
| 2025-12-31 | State Informal Action |
| 2025-11-25 | State Order Extension |
| 2025-10-20 | State Informal Action |
| 2025-10-20 | State Informal Enforcement |
| 2025-08-11 | State Informal Action |
| 2025-07-28 | State Informal Action |
| 2025-07-28 | State Informal Enforcement |
| 2025-05-27 | State Informal Action |
| 2025-05-20 | State Informal Enforcement |
| 2025-04-23 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-12-31.
La Coste vs. Nearby Texas Cities
How La Coste's water quality compares to similar cities in Texas:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| La Coste | A | 0 | 9 | 2,311 |
| Sam Norwood | C | 0 | 1 | 2,311 |
| Zavalla | B | 87 | 7 | 2,309 |
| North Zulch | A | 0 | 2 | 2,304 |
Common Questions About La Coste Water
These are the most common questions residents search for about water quality in La Coste, Texas:
Is La Coste water hard or soft? Water hardness varies by source. La Coste's 9 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink La Coste tap water? La Coste's water receives a grade of A (90/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for La Coste? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
La Coste vs. Texas Average
Understanding how La Coste compares to the broader Texas average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within La Coste.
ZIP Codes in La Coste
La Coste spans 1 ZIP code. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.
Frequently Asked Questions
Your Water is Safe - Here's How to Keep It That Way
Grade A is excellent news. Here's what proactive homeowners do to maintain water quality:
Annual Water Testing
EPA recommends annual testing even with clean water. Home test kits: $20-$50. Catches changes before they become problems.
Maintenance Filtration
A basic carbon filter removes chlorine taste and catches emerging contaminants like PFAS that aren't yet fully regulated.
Plumbing Check
Even safe city water picks up lead from home pipes. If your home was built before 1986, a one-time pipe inspection is recommended.