Water Quality in San Marcos, TX (78656)
EPA violation data for public water systems serving ZIP code 78656.
Past Health-Based Violations
2 health-based violations were found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There are also 6 monitoring/reporting violations.
More violations than 62% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
2,847
Population
6
Water Systems
8
Violations (5yr)
2
Health-Based
Location
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Water Systems Serving This Area (6)
City Of San Marcos
City Of Kyle
Texas State University - San Marcos
Goforth Sud
2 health-basedCounty Line Sud
All resolvedCity Of Lockhart
Contaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Annual water quality report delivery requirement.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Marcos (78656) has more violations than 62% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 8.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.