CheckPFAS

City overview · Bexar County

PFAS in San Antonio, TX

Low Level

EPA UCMR 5 tested 13 public water systems serving the San Antonio area across 62 ZIP codes. Only trace PFAS were detected across San Antonio's tested systems.

Water systems tested
13
Systems above EPA limits
0
ZIP codes covered
62
County
Bexar County, Texas

Plain English

01What this means for San Antonio

The water systems serving the San Antonio area measured only low, trace concentrations of PFAS — well below the EPA's Maximum Contaminant Levels. For most residents this represents minimal risk from drinking water. Review your specific ZIP below, and check your utility's annual Consumer Confidence Report for year-over-year trends.

By utility

02Water systems serving San Antonio

  1. SAN ANTONIO WATER SYSTEM

    4 detected · 0 above limit · PWSID TX0150018

    Low Level

  2. SAWS CASTLE HILLS

    2 detected · 0 above limit · PWSID TX0150045

    Low Level

  3. GREEN VALLEY SUD

    2 detected · 0 above limit · PWSID TX0940020

    Low Level

  4. SAWS NORTHEAST

    1 detected · 0 above limit · PWSID TX0150084

    Low Level

  5. CITY OF KIRBY

    1 detected · 0 above limit · PWSID TX0150010

    Low Level

  6. CITY OF ELMENDORF

    1 detected · 0 above limit · PWSID TX0150048

    Low Level

  7. EAST CENTRAL SUD

    1 detected · 0 above limit · PWSID TX0150138

    Low Level

  8. OAK HILLS WSC

    1 detected · 0 above limit · PWSID TX2470009

    Low Level

  9. JBSA - SAM HOUSTON

    1 detected · 0 above limit · PWSID TX0150116

    Low Level

  10. CITY OF LIVE OAK

    1 detected · 0 above limit · PWSID TX0150068

    Low Level

  11. CITY OF LEON VALLEY

    1 detected · 0 above limit · PWSID TX0150178

    Low Level

  12. ATASCOSA RURAL WSC

    1 detected · 0 above limit · PWSID TX0150040

    Low Level

  13. CITY OF GARDEN RIDGE

    1 detected · 0 above limit · PWSID TX0460027

    Low Level

By ZIP code

03Find your exact result

Contamination can differ block to block. Select your ZIP code for the precise reading at the utility that serves your address.

7820178202782037820478205782077820878209782107821178212782137821478215782167821778218782197822078221782227822378224782257822678227782287822978230782317823278233782347823578236782377823878239782407824278244782457824778248782497825078251782527825378254782557825678257782587825978260782617826378264782667828478288

Source & Methodology

About this data

Source
EPA UCMR 5
Sampling period
January 2023 – December 2025
Aggregation
13 utilities across 62 ZIP codes
Detection threshold (MRL)
~1.5–2 ppt

City-level figures aggregate the individual public water systems tested under EPA UCMR 5 whose service area falls within the San Antonio area. Values reflect water quality at the treatment plant; your home's plumbing can affect what reaches your tap. Select your ZIP above for the utility-specific reading.