PFNA in Treasure Valley drinking water
7 of 42 systems that tested for it in the last 36 months detected it; 7 are above the limit, elevated, or an aesthetic issue. PFNA is a PFAS compound. Some results are from EPA UCMR monitoring, not a claim it is in every tap. Certified filters are in the list.
| System | County | 36 mo max | Latest | Status | Last sample |
|---|---|---|---|---|---|
| Capitol Water Corp. | Ada | 51.0ppt | ND | Elevated | 2024-10-08 |
| Garden City Water and Sewer System | Ada | 8.2ppt | ND | Elevated | 2024-10-14 |
| Meridian Water Department | Ada | 3.0ppt | ND | Elevated | 2026-06-02 |
| Trinity Estates Water Users Association | Elmore | 3.0ppt | 3.0ppt | Elevated | 2025-04-01 |
| Rustic Acres Mobile Home Park | Ada | 2.9ppt | 2.9ppt | Elevated | 2024-04-23 |
| Sawtooth Estates Water Users | Elmore | 2.8ppt | 1.1ppt | Elevated | 2025-04-01 |
| Veolia Water Idaho | Ada | 2.4ppt | 2.1ppt | Elevated | 2026-03-10 |
Limits
- Federal limit (MCL)
- 0.01 ug/L (10.0ppt)
- Health goal (MCLG)
- 10.0ppt
EPA set an MCL of 10 ppt for PFNA in 2024.Agency language as recorded in the contaminant reference.
Removal methods in the reference list: reverse osmosis, granular activated carbon, anion exchange. A method name is not a product certification.
By city: PFNA in Boise City drinking water, PFNA in Garden City drinking water, PFNA in Meridian drinking water.
Not enough groundwater samples in the region to estimate PFNA in private wells. A lab test is the only way to know.
Numbers are the system's samples at its taps and wells, not yours. Lead and copper are 90th percentiles from sampled homes. Well pages are nearby-sample estimates. Health text restates EPA and DEQ. Methodology.