PFAS Detections in Idaho ZIP Codes — 2026

Out of 10 ZIP codes with data in Idaho, these are the highest-ranked areas for pfas status. See also: National ZIP Codes with PFAS Detections in Water | All Idaho Rankings

Statistic	Value
ZIP codes ranked	10
Highest value	0.1 ppt
Median value	0.0 ppt
State	Idaho

Top 10 Worst ZIP Codes

Rank	ZIP Code	City	State	PFAS Status	Safety Score
1	83704	Boise	ID	0.1 ppt	72/100
2	83714	Garden City	ID	0.0 ppt	56/100
3	83648	Mountain Home A F B	ID	0.0 ppt	53/100
4	83858	Rathdrum	ID	0.0 ppt	66/100
5	83501	Lewiston	ID	0.0 ppt	94/100
6	83642	Meridian	ID	0.0 ppt	75/100
7	83646	Meridian	ID	0.0 ppt	75/100
8	83680	Meridian	ID	0.0 ppt	73/100
9	83661	Payette	ID	0.0 ppt	76/100
10	83274	Shelley	ID	0.0 ppt	74/100

Methodology

PFAS detection data comes from EPA UCMR5 monitoring, state-level testing programs, and Consumer Confidence Reports. ZIP codes are ranked by maximum PFAS concentration detected. The EPA has set MCLs of 4 ppt for PFOA and PFOS individually. PFAS are persistent chemicals that do not break down in the environment.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-06-04.

Frequently Asked Questions

What are PFAS?

PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals used in non-stick coatings, firefighting foam, and food packaging since the 1940s. They are called "forever chemicals" because they do not break down naturally. PFAS are linked to cancer, liver damage, thyroid disease, and immune system suppression.

How can I remove PFAS from my water?

Reverse osmosis (RO) and granular activated carbon (GAC) filters are effective at removing most PFAS from drinking water. NSF/ANSI 53 or 58 certified filters are recommended. Boiling water does NOT remove PFAS.