Hermiston vs Prineville Water Quality
Side-by-side water quality comparison for two Oregon cities.
If you are comparing Hermiston and Prineville water quality - whether moving, choosing between the two, or curious about a relative's water - here is what the data shows.
Hardness comparison
Hermiston has somewhat harder water at 50 PPM versus Prineville at 48 PPM, a difference of 2 PPM. Prineville residents generally do not need any water softening equipment.
Water sources and why they differ
Water sources differ: Hermiston draws from Columbia River via USBR, while Prineville uses Crooked River & Ochoco Creek. Both use similar source types, but local geology creates the hardness variation.
Contaminant concerns
PFAS contamination is a concern in Hermiston (29.5 ppt, above the EPA limit of 4 ppt). A reverse osmosis system or NSF P473-certified filter is recommended for drinking water.
What this means for you
Not sure what your specific situation needs? Take the quiz to get a recommendation based on your water data, budget, and household size.
| Metric | Hermiston | Prineville |
|---|---|---|
| Hardness | 50 PPM | 48 PPM |
| GPG | 2.9 | 2.8 |
| TDS | 67 PPM | 83 PPM |
| PFAS | 29.5 ppt | 0 ppt |
| Lead | 3 ppb | 1.9 ppb |
| Chlorine | 0.7 mg/L | 0.4 mg/L |
| Level | Slightly Hard | Slightly Hard |