Round Rock, TX: 6 Violations — 92/100 (2026)
6 ZIP codes · 15 water systems · Updated 2026-06-03
Tap water in Round Rock, TX scores well — low violation counts, above-average safety grade.
How Round Rock Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Round Rock, TX
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Distribution of water safety grades across Round Rock.
Round Rock Water: The Quick Version
- Your city's water systems recorded 6 violations in the past 5 years.
- Average lead level: 0.005 mg/L.
- Estimated remediation: $1,767 per household.
- CDC health risk index: 10.49.
Water Systems Serving Round Rock
Multiple utilities divide Round Rock, TX's water service — 3 leading providers among 15 on the federal register.
Overview
We track water quality and home safety data for 6 ZIP codes in Round Rock, Texas (population ~184,890), covering 15 community water systems serving approximately 1,834,791 people region-wide.
6 of 6 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Round Rock: A (92/100)
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
Round Rock water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0050 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): 6 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 7 | 6 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 78664 | A | 1 | 0 | City of Round Rock |
| 78665 | A | 1 | 0 | City of Round Rock |
| 78680 | A | 1 | 0 | City of Round Rock |
| 78681 | A | 1 | 0 | City of Round Rock |
| 78682 | A | 1 | 0 | City of Round Rock |
| 78683 | A | 1 | 0 | City of Round Rock |
All ZIP Codes in Round Rock
- 78664 [A] — 1 violation
- 78665 [A] — 1 violation
- 78680 [A] — 1 violation
- 78681 [A] — 1 violation
- 78682 [A] — 1 violation
- 78683 [A] — 1 violation
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 Round Rock
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 Round Rock
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Round Rock: Remediation Cost in Perspective
In Round Rock, the equity impact of remediation is proportionally small — not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.
Remediation costs in Round Rock are relatively low compared to home values. The $1,167–$2,533 estimated range is a small fraction of median property value. Home values are 92% above the Texas average.
Protecting Children from Lead in Round Rock
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.
Lead risk in Round Rock appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Round Rock
312 FEMA flood insurance claims are on file for Round Rock, and 67% of local ZIP codes fall within federally designated flood zones — enough to put flood exposure on the planning radar, though short of the concentrated-risk threshold where treatment-system vulnerability becomes a primary consideration.
Round Rock has a moderate flood history with 312 FEMA claims averaging $17,850 per payout. 67% 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>$1,767</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 Round Rock, TX