Round Rock, TX Water Quality Report
Is Round Rock tap water safe? See PFAS and lead contamination levels for Round Rock, Texas. Compare to EPA limits and get filter recommendations.
Quick Answers
Is Round Rock, TX tap water safe to drink? Round Rock, TX tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 6.06 ppt across 10 compounds. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.
What contaminants are in Round Rock, TX water? Top PFAS compounds detected in Round Rock water: PFBA (33.8 ppt), PFNA (24.3 ppt), PFPeA (21.2 ppt). See the full table for all monitored contaminants and comparison to EPA limits.
What filter should I use in Round Rock, TX? For Round Rock, TX households, reverse osmosis removes 90%+ of PFAS, lead, and arsenic. Pitcher and faucet filters certified to NSF-53 for PFAS (ZeroWater, PUR PLUS) work for smaller households. Skip standard Brita filters for PFAS removal.
Round Rock, TX Water Quality Summary
EPA testing has detected PFAS "forever chemicals" in Round Rock, TX drinking water. Recent monitoring found a peak level of 33.8 ppt across 13 water systems, representing an average of 6.06 ppt across 10 detected compounds. These levels come from individual EPA UCMR 5 water samples (2023-2025). The EPA's 4 ppt limit for PFOA and PFOS is enforced on a running annual average, so a sample above it shows real exposure but is not by itself a violation.
Contamination Level: MODERATE – Moderate contamination – PFAS detected at meaningful levels; filtration recommended.
Top Detected Compounds
- PFBA: 33.8 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFNA: 24.3 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFPeA: 21.2 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFOS: 12.4 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
- PFHxA: 10.1 ppt (exceeds EPA 4 ppt limit for PFOA/PFOS)
Lead in Round Rock, TX Water
EPA Lead and Copper Rule testing has recorded 57 lead samples for Round Rock water systems, with a 90th-percentile high of 0.00505 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.
EPA Violations in Round Rock, TX
Round Rock public water systems have 24 health-based EPA Safe Drinking Water Act violations on record, including Interim Enhanced Surface Water Treatment Rule, Total Trihalomethanes (TTHM), Total Coliform Rule. Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.
About the Data
Source: EPA UCMR5 (Unregulated Contaminant Monitoring Rule 5), the 2023-2025 national testing program spanning about 10,000 public water systems – the broadest PFAS survey ever run in the US. Round Rock, TX serves a population of roughly 133,372.
ZIP Codes Served
What Round Rock, Texas Residents Should Do
- Enter your exact ZIP code at knowyourexposure.com for address-level data
- Request the latest Consumer Confidence Report (CCR) from your Texas utility – it is free and updated annually
- Choose a filter certified for PFAS: NSF/ANSI 58 reverse osmosis (94-99% removal) or an NSF-53 pitcher
- High-exposure households (pregnancy, infants, immunocompromised) should also consider a PFAS home test kit