Water Quality in 78664 — Round Rock, TX
EPA data for CITY OF ROUND ROCK
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 78664 in Round Rock, Texas is served by CITY OF ROUND ROCK (EPA ID: TX2460003). This system provides water to approximately 130,662 people from surface water sources.
There are 10 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| April 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| April 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 2 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| CITY OF ROUND ROCK | TX2460003 | 130,662 | Surface water |
| BRUSHY CREEK MUD | TX2460061 | 18,314 | Surface water |
| FERN BLUFF MUD | TX2460128 | 5,682 | Surface water |
| HEADWATERS AT BARTON CREEK | TX1050184 | 2,315 | Surface water |
| BLESSING MOBILE HOME PARK | TX2460031 | 1,518 | Surface water |
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Texas
- 73301 (Austin) — 10 violations
- 75006 (Carrollton)
- 75014 (Irving)
- 75023 (Plano) — 1 violation
- 75029 (Lewisville) — 26 violations
- 75040 (Garland) — 3 violations
- 75050 (Grand Prairie) — 225 violations
- 75080 (Richardson) — 84 violations
- 75149 (Mesquite) — 4 violations
- 75201 (Dallas) — 10 violations
- 75401 (Greenville) — 6 violations
- 75501 (Texarkana) — 270 violations
- 75601 (Longview) — 1 violation
- 75701 (Tyler) — 13 violations
- 75801 (Palestine) — 17 violations
- 75901 (Lufkin) — 71 violations
- 75961 (Nacogdoches) — 38 violations
- 76001 (Arlington) — 11 violations
- 76101 (Fort Worth) — 7 violations
- 76201 (Denton) — 5 violations
Nearby Water Quality Reports
- 73301 (Austin) — 14 mi — 10 violations
- 76540 (Killeen) — 42 mi — 17 violations
- 76501 (Temple) — 44 mi — 1 violation
- 76528 (Gatesville) — 63 mi — 77 violations
- 77801 (Bryan) — 78 mi — 10 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for CITY OF ROUND ROCK (TX2460003) on EPA.gov.
Frequently Asked Questions
Is the tap water in 78664 safe to drink?
Based on EPA records, the water system serving ZIP code 78664 has only monitoring/reporting violations, which are procedural in nature. However, individual home conditions (old pipes, well water) can affect quality.
Where does 78664’s water come from?
The primary water source for this area is surface water. CITY OF ROUND ROCK serves approximately 130,662 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 78664 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 78664. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 78664?
Radon zone data is not available for ZIP code 78664. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.