San Marcos, TX Water Quality (ZIP 78666)

PFAS, lead, and EPA-tested contaminants for ZIP 78666 in San Marcos, TX.

ZIP code 78666 in San Marcos, TX is served by the same public water system that supplies the rest of San Marcos. Because the EPA test results are identical across these ZIP codes, the full contamination breakdown lives on one page.

See the full San Marcos, TX water quality report →

Check your exact address

  1. Open the full San Marcos report for PFAS levels, lead samples, and EPA violations.
  2. Enter your address at knowyourexposure.com for the most specific data we have.
  3. Choose a certified filter: an NSF/ANSI 58 reverse osmosis system removes 94-99% of PFAS, and an NSF-53 pitcher covers lead.