Exceeds EPA Limit PFAS EXCEEDS EPA LIMIT

PFAS in Hermiston, OR Drinking Water

PFAS data for Hermiston, Oregon · 27,979 residents · 1 ZIP code

ZipCheckup's reading of PFAS in Hermiston, Oregon: the highest detected level is 0.012 ppt; the EPA limit is 4 ppt (PFOA/PFOS individually). PFAS carries a high health-risk designation.

Water quality records for Hermiston, Oregon show PFAS detections on file - a finding that places it among the contaminants worth tracking for this area.

0.012 ppt
Max Level Detected
17 ppt
Average Level
4 ppt (PFOA/PFOS individually)
EPA MCL
High
Health Risk
Reverse Osmosis or Granular Activated Carbon
Best Filter Method

Data: EPA SDWIS, CCR Reports, ECHO Last verified: 2026-07-13

PFAS in Hermiston Tap Water

PFAS has been detected in Hermiston, Oregon drinking water at a maximum level of 0.012 detections — relative to the EPA MCL of 4 ppt (PFOA/PFOS individually).

This analysis covers 27,979 residents across 1 ZIP code in Hermiston.

Hermiston's overall water quality grade is B (75/100).

Is PFAS in Hermiston Water Safe?

PFAS levels in parts of Hermiston exceed the EPA MCL of 4 ppt (PFOA/PFOS individually). The EPA requires water systems to take corrective action when this limit is exceeded.

If you live in an affected ZIP code, consider installing a reverse osmosis or granular activated carbon filter certified under NSF 53 / NSF 58 and testing your water independently.

PFAS Levels by ZIP Code

ZIP Code PFAS Level EPA Limit Status
97838 17 detections 4 ppt (PFOA/PFOS individually) Not comparable

Average pfas level across Hermiston: 17 ppt

Health Effects of PFAS

  • Increased risk of kidney and testicular cancer
  • Thyroid disease and immune system suppression
  • Reproductive problems and reduced fertility
  • Elevated cholesterol and liver effects
  • Developmental effects in infants and children

Health risk severity: High. Governed by the PFAS National Primary Drinking Water Regulation (2024).

How PFAS Gets Into Drinking Water

  • Firefighting foam (AFFF) used at military bases and airports
  • Industrial manufacturing (non-stick coatings, stain-resistant fabrics)
  • Wastewater treatment plants that receive industrial discharge
  • Landfill leachate from PFAS-containing consumer products

What to Do About PFAS in Hermiston Water

  1. Install a reverse osmosis system (most effective — removes 90%+ of PFAS)
  2. Granular activated carbon (GAC) filters remove some PFAS compounds
  3. Look for NSF 53 or NSF 58 certification specifically tested for PFAS
  4. Pitcher filters with activated carbon provide partial reduction

Look for filters certified under NSF 53 / NSF 58 for pfas removal.

Related

Home → Contaminants → PFAS → Oregon → Hermiston

How to cite this page

APA ZipCheckup. (2026). PFAS in Hermiston, OR Drinking Water. https://zipcheckup.com/contaminants/pfas/hermiston-or/
BibTeX 
@misc{zipcheckup-contaminants-pfas-hermiston-or,
  author = {{ZipCheckup}},
  title  = {{PFAS in Hermiston, OR Drinking Water}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/pfas/hermiston-or/}
}

Data as of July 2026.

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