Lewisville, TX: 4 Health Violations — 88/100 (2026)
4 ZIP codes · 7 water systems · Updated 2026-06-03
In current tracking cycles, Lewisville records above-average water quality outcomes for TX; compliance history over recent years shows few departures from federal standards and no systemic failures across its water systems.
How Lewisville Compares
Data: EPA SDWIS Last verified: 2026-06-03
Lewisville Water: The Quick Version
- Your city's water systems recorded 36 violations in the past 5 years.
- Average lead level: 0.0014 mg/L.
- Homes built before 1986: 34% — older plumbing may contain lead solder.
- Estimated remediation: $1,725 per household.
- CDC health risk index: 10.56.
Water Systems Serving Lewisville
Lewisville, TX draws its residential water from 3 separate providers among the 7 federally tracked systems. Each operates independently, with its own infrastructure, rate structure, and compliance record.
Overview
We track water quality and home safety data for 4 ZIP codes in Lewisville, Texas (population ~126,170), covering 7 community water systems serving approximately 285,569 people region-wide.
4 of 4 ZIP codes (100%) have recorded EPA violations. 4 health-based violations documented.
Home Safety Score
Average Home Safety Score for Lewisville: A (88/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Lewisville water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0014 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 4 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | 10 | 4 |
| Surface Water Treatment Rule | Treatment Technique | 10 | 4 |
| Lead and Copper Rule | Treatment Technique | 10 | 4 |
| Contaminant 2959 | Other | 5 | 4 |
| Consumer Confidence Report Rule | Reporting | 5 | 4 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 75029 | A | 9 | 1 | City of Lewisville |
| 75057 | A | 9 | 1 | City of Lewisville |
| 75067 | A | 9 | 1 | City of Lewisville |
| 75077 | B | 9 | 1 | City of Lewisville |
All ZIP Codes in Lewisville
- 75029 [A] — 9 violations ⚠
- 75057 [A] — 9 violations ⚠
- 75067 [A] — 9 violations ⚠
- 75077 [B] — 9 violations ⚠
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
Updated daily.
CDC Health Data for Lewisville
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Lewisville
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Lewisville's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Prohibited from residential plumbing since 1986, lead solder divides Lewisville's housing stock along a timeline that the median build year of 1996 straddles. A meaningful share of homes predates the ban — a configuration that places moderate aggregate pressure on plumbing-related lead risk, distributed unevenly across neighborhoods.
Most homes in Lewisville were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Lewisville: Remediation Cost in Perspective
Remediation costs in Lewisville are small relative to typical property values — the cost-to-value ratio here is favorable.
Remediation costs in Lewisville are relatively low compared to home values. The $1,075–$2,725 estimated range is a small fraction of median property value. Home values are 41% above the Texas average.
Protecting Children from Lead in Lewisville
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
34% of Lewisville housing dates to the pre-rule era, alongside aggregate readings hovering at the federal action mark — household-level confirmation through a draw-test kit fits the local picture.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Lewisville
NFIP records stretching across multiple decades show Lewisville accumulating 117 claims and carrying 75% of its ZIP codes inside FEMA flood zones — evidence of meaningful exposure that extends beyond isolated incidents. The mechanisms linking flooding to water quality haven't changed: treatment facilities can be overwhelmed, wells can be infiltrated, and distribution systems can experience backflow. For a community at this exposure level, those mechanisms shift from hypothetical to periodically relevant.
Lewisville has a moderate flood history with 117 FEMA claims averaging $18,061 per payout. 75% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,725</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Lewisville, TX