Contaminant guide

PFAS (per- and polyfluoroalkyl substances)

PFAS are persistent “forever chemicals” used in many industrial and consumer products. EPA has begun regulating specific PFAS in drinking water.

Health context

Exposure is linked to immune effects, cholesterol changes, developmental effects, and some cancers depending on the compound and dose.

EPA standard notes

EPA finalized MCLs for several PFAS (including PFOA and PFOS at 4.0 ppt). Monitoring and compliance timelines are rolling out—check current EPA PFAS rule pages.

Standards and rules change—confirm on epa.gov/sdwa.

What you can do

Watch for PFAS results in future CCRs as monitoring expands.
If concerned, look for filters certified to NSF/ANSI 53 or 58 with PFAS reduction claims.

FAQ

Is a filter required?

Not automatically. Many systems meet standards without point-of-use filters. Filters can be useful for taste, specific contaminants, or home plumbing issues—match certifications to the problem.

Where should I verify numbers?

Your utility’s Consumer Confidence Report, public notices, TCEQ resources, and EPA ECHO/SDWIS records.