Water Quality in League City, TX: 40 Violations — Grade C
Grade C · Score 68/100 · 2 water systems · Updated 2026-05-03
League City's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Local water systems serving League City, TX carry 40 EPA violations on record in the federal compliance database — documented events spanning categories from maximum contaminant level exceedances to monitoring requirements tracked by the national Safe Drinking Water program.
Water Quality by ZIP Code in League City
Water quality varies across League City's 2 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 77573 | C | 60 | 20 | 12 | View report → |
| 77574 | B | 75 | 20 | 12 | View report → |
Violation Trend
EPA violations recorded for water systems serving League City.
Water Quality Overview
League City, Texas receives a water quality grade of C with an overall score of 68 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving League City have accumulated 40 EPA violations, including 24 health-based violations. These violations are tracked across 2 ZIP codes serving approximately 128,682 people.
What Grade C Means
A grade of C indicates moderate compliance issues. League City's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across League City water systems is 0.0030 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
Water Systems Serving League City
League City is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 128,682 people across 2 ZIP codes.
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 20 enforcement actions against water systems serving League City. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in League City
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
Contaminants Detected in League City Water Systems
The following contaminants have been detected or caused violations across League City's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Barium | Inorganic | 2 mg/L | 24 | 2 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 4 | 2 | No |
| Lead and Copper Rule | Treatment Technique | N/A | 4 | 2 | No |
| Stage 2 DBP Rule | Treatment Technique | N/A | 4 | 2 | Yes |
| Total Coliform | Microbiological | N/A | 2 | 2 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 2 | 2 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving League City:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 4 | 4 |
| 2022 | 8 | 8 |
| 2023 | 6 | 6 |
| 2024 | 2 | 2 |
| 2025 | 2 | 2 |
Violations have decreased from 4 in 2021 to 2 in 2025, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving League City. Recent actions:
| Date | Action Type |
|---|---|
| 2025-06-16 | State Informal Action |
| 2025-05-13 | State Order Extension |
| 2025-04-23 | State Informal Action |
| 2025-04-23 | State Informal Enforcement |
| 2025-04-22 | State Order Extension |
| 2025-04-14 | State Informal Action |
| 2025-04-14 | State Informal Enforcement |
| 2024-12-30 | State Order Extension |
| 2024-10-28 | State Informal Action |
| 2024-10-28 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-06-16.
League City vs. Nearby Texas Cities
How League City's water quality compares to similar cities in Texas:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| League City | C | 40 | 2 | 128,682 |
| Kemah | D | 0 | 1 | 128,412 |
| Weir | C | 0 | 1 | 130,662 |
| Pearland | B | 54 | 5 | 132,760 |
Common Questions About League City Water
These are the most common questions residents search for about water quality in League City, Texas:
Is League City water hard or soft? Water hardness varies by source. League City's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink League City tap water? League City's water receives a grade of C (68/100). There are 24 health-based violations — consider filtration.
What is the best water filter for League City? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
League City vs. Texas Average
Understanding how League City 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 League City.
ZIP Codes in League City
League City spans 2 ZIP codes. The ZIP with the lowest water quality score is 77573. 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.