Water Quality in Laredo, TX: 272 Violations — Grade C
Grade C · Score 66/100 · 4 water systems · Updated 2026-05-03
Laredo'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
SDWIS records for Laredo, TX show 272 EPA violations documented for the local water supply — these span the full range of reportable events from health-based exceedances to monitoring and reporting lapses registered with the federal program.
Water Quality Map: Laredo, TX
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Water Quality by ZIP Code in Laredo
Water quality varies across Laredo's 8 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 78041 | C | 60 | 34 | 24 | View report → |
| 78045 | C | 60 | 34 | 24 | View report → |
| 78040 | C | 65 | 34 | 24 | View report → |
| 78043 | C | 65 | 34 | 24 | View report → |
| 78049 | C | 66 | 34 | 24 | View report → |
| 78042 | B | 70 | 34 | 24 | View report → |
| 78044 | B | 70 | 34 | 24 | View report → |
| 78046 | B | 70 | 34 | 24 | View report → |
Violation Trend
EPA violations recorded for water systems serving Laredo.
Water Quality Overview
Laredo, Texas receives a water quality grade of C with an overall score of 66 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 4 water systems serving Laredo have accumulated 272 EPA violations, including 192 health-based violations. These violations are tracked across 8 ZIP codes serving approximately 271,820 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Laredo'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 Laredo water systems is 0.0009 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
Water Systems Serving Laredo
Laredo is served by 4 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 271,820 people across 8 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 80 enforcement actions against water systems serving Laredo. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Laredo
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 Laredo Water Systems
The following contaminants have been detected or caused violations across Laredo's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 112 | 8 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 56 | 8 | Yes |
| Lead and Copper Rule | Treatment Technique | N/A | 40 | 8 | No |
| Stage 2 DBP Rule | Treatment Technique | N/A | 32 | 8 | Yes |
| Fecal Coliform | Microbiological | N/A | 16 | 8 | No |
| Revised Total Coliform Rule | Microbiological | N/A | 8 | 8 | 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 Laredo:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2023 | 8 | 8 |
| 2024 | 64 | 64 |
| 2025 | 48 | 48 |
Violations have increased from 8 in 2023 to 48 in 2025. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Laredo. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-23 | State Informal Action |
| 2025-09-23 | State Informal Enforcement |
| 2025-09-09 | State Informal Action |
| 2025-09-05 | State Informal Action |
| 2025-09-03 | State Informal Action |
| 2025-09-03 | State Informal Enforcement |
| 2025-08-04 | State Informal Action |
| 2025-07-22 | State Order Extension |
| 2025-07-22 | State Informal Action |
| 2025-07-10 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-23.
Laredo vs. Nearby Texas Cities
How Laredo's water quality compares to similar cities in Texas:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Laredo | C | 272 | 4 | 271,820 |
| Lubbock | D | 1458 | 5 | 276,286 |
| Irving | A | 0 | 1 | 264,546 |
| Edinburg | B | 28 | 2 | 256,419 |
Recommended Water Filters for Laredo
Based on contaminants detected in Laredo's water supply, these filter types are recommended:
UV Disinfection System (POE or POU)
- Removes: Fecal Coliform or E. Coli
- Effectiveness: 99.99%
- Cost range: $100–$700
- Certification: NSF/ANSI 55
- Recommended products:
- Viqua VH200
- HQUA UV System
- Waterdrop G3P800
Granular Activated Carbon (GAC, under-sink or whole-house)
- Removes: Haloacetic Acids (HAA5)
- Effectiveness: 60-80%
- Cost range: $100–$600
- Certification: NSF/ANSI 53
- Recommended products:
Granular Activated Carbon (GAC, whole-house POE)
- Removes: Total Trihalomethanes (TTHM)
- Effectiveness: 80-99%
- Cost range: $400–$2000
- Certification: NSF/ANSI 53
- Recommended products:
Water Quality by ZIP Code in Laredo
Water quality varies across Laredo's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 78041 | 60 | C | 34 | 24 |
| 78045 | 60 | C | 34 | 24 |
| 78040 | 65 | C | 34 | 24 |
| 78043 | 65 | C | 34 | 24 |
| 78049 | 66 | C | 34 | 24 |
| 78042 | 70 | B | 34 | 24 |
| 78044 | 70 | B | 34 | 24 |
| 78046 | 70 | B | 34 | 24 |
Common Questions About Laredo Water
These are the most common questions residents search for about water quality in Laredo, Texas:
Is Laredo water hard or soft? Water hardness varies by source. Laredo's 4 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Laredo tap water? Laredo's water receives a grade of C (66/100). There are 192 health-based violations — consider filtration.
What is the best water filter for Laredo? Based on detected contaminants, a uv disinfection system (poe or pou) filter is most recommended. See our Water Filter Matcher for personalized recommendations.
Laredo vs. Texas Average
Understanding how Laredo 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 Laredo.
ZIP Codes in Laredo
Laredo spans 8 ZIP codes. The ZIP with the lowest water quality score is 78040. 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.