Tap Water Quality in Seguin, Texas (ZIP 78155)
Serving Seguin, Texas
Is the Tap Water Safe in Seguin, Texas?
Tap water in Seguin, Texas (ZIP 78155) has 12 contaminants above EPA health-based guidelines (MCLGs) in at least one of the 1 city served. We recommend reviewing detailed city reports below and considering a certified water filter for additional protection.
ZIP 78155 is served by 3 water utilities providing water to Seguin. 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 Quality Report for ZIP 78155
5 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 Seguin
Found in Seguin
Found in Seguin
Found in Seguin
Found in Seguin
Water Utilities Serving ZIP 78155
GREEN VALLEY SUD
39,258
Not available
Water Source:
Surface water purchased
Contaminants Tested:
210
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Best Water Filters for Seguin (ZIP 78155)
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 Seguin Tap Water
Is the tap water safe in Seguin, Texas (ZIP 78155)?
Which water utilities serve ZIP code 78155?
How do I pay my water bill in Seguin (ZIP 78155)?
What contaminants are in Seguin water (ZIP 78155)?
Should I use a water filter in Seguin (ZIP 78155)?
What cities are in ZIP code 78155?
How we built this page
Water-quality data on this page comes from public federal and state records for the 3 utilityies serving ZIP 78155. 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 plus the Texas Department of Environmental Protection / Drinking Water program.
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