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Tap Water Quality in Round Rock, Texas (ZIP 78681)
Serving 2 cities in this area, including Round Rock
Is the Tap Water Safe in Round Rock, Texas?
Tap water in Round Rock, Texas (ZIP 78681) has 3 contaminants above EPA health-based guidelines (MCLGs) in at least one of the 2 cities served. We recommend reviewing detailed city reports below and considering a certified water filter for additional protection.
ZIP 78681 is served by 5 water utilities providing water to Round Rock, Brushy Creek. Water quality varies by utility and city. Click on the cities below to see detailed reports for your specific area.
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Water Hardness in ZIP 78681
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Cities in ZIP 78681
Water Quality Report for ZIP 78681
3 contaminants above EPA health guidelines
These levels represent the worst case across all cities in this ZIP code. Check individual city reports for specific details.
Found in Round Rock
Found in Round Rock
Found in Round Rock
Worried about Bromoform in your water?
You're viewing 3 contaminants above health-based guidelines here, including Bromoform. Your own tap water can differ — upload your test (PDF or a photo) and we'll email a full plain-English reading of every number, free.
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Upload my testWater Utilities Serving ZIP 78681
JONAH WATER SUD
Serves Round Rock; EPA holds no ZIP-level record for this system.
29,378
Water Source:
Surface water purchased
Contaminants:
226 results on file
CITY OF ROUND ROCK
Serves Round Rock; EPA holds no ZIP-level record for this system.
MANVILLE WSC
Serves Round Rock; EPA holds no ZIP-level record for this system.
39,648
Water Source:
Surface water purchased
Contaminants:
231 results on file
FERN BLUFF MUD
Serves Brushy Creek; EPA holds no ZIP-level record for this system.
5,682
Not available
Water Source:
Surface water purchased
Contaminants:
42 results on file
CITY OF AUSTIN WATER & WASTEWATER
Serves Brushy Creek; EPA holds no ZIP-level record for this system.
1,044,405
Water Source:
Surface water
Contaminants:
242 results on file
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Best Water Filters for Round Rock (ZIP 78681)
Based on the contaminants found in your area, we recommend NSF-certified water filters that can remove the specific contaminants above health guidelines.
Find a filter certified for your water
Browse third-party-certified filters by the contaminant you care about — each list shows exactly which NSF/ANSI standard backs the claim, no marketing spin.
Browse filters by contaminantFrequently Asked Questions about Round Rock Tap Water
Is the tap water safe in Round Rock, Texas (ZIP 78681)?
Which water utilities serve ZIP code 78681?
How do I pay my water bill in Round Rock (ZIP 78681)?
What contaminants are in Round Rock water (ZIP 78681)?
Should I use a water filter in Round Rock (ZIP 78681)?
What cities are in ZIP code 78681?
How we built this page
Water-quality data on this page comes from public federal and state records for the 5 utilityies serving ZIP 78681. We refresh each utility's record whenever its underlying source publishes new data.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: the most recent published Consumer Confidence Report (CCR) from each utility serving this ZIP, where available.
- Service area & contact: EPA SDWIS. The compliance records it holds for these systems are reported to EPA by Texas TCEQ, the state's drinking-water primacy agency.
Spotted a data issue? Use the Spotted something off? link at the bottom of the page — corrections feed back into the next data refresh. Learn more about TapWaterData.
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