Water Quality in San Antonio, TX (78023)
EPA violation data for public water systems serving ZIP code 78023.
Active Health Violations
2 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 85% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
28,462
Population
21
Water Systems
31
Violations (5yr)
2
Health-Based
Location
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Water Systems Serving This Area (21)
San Antonio Water System
Benton City Wsc
Grey Forest Water System
1 health-basedRanch Hills Water Supply Corporation
1 health-basedEl Chaparral Restaurant
Diamond W Longhorn Ranch
Little Village School
Minnies Place
Bergheim Campground
Helotes Festival Association
New Helotes Inn Restaurant
Bobby Js Bbq
A J Mullins
Casa Helotes
Schotts Taxidermy Meat Market & Store
Villarreal'S Ice House
Blue Shadow Village Mh Park
Ramsey Ranch Acres
Schoenstatt Movement Of San Antoni
Azadero 46 Bar & Grill
Oak Country Property Owners Assn
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Annual water quality report delivery requirement.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
How Does This Compare?
San Antonio (78023) has more violations than 85% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 31.
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.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 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.