Harrisonburg vs Herndon Water Quality
Side-by-side water quality comparison for two Virginia cities.
If you are comparing Harrisonburg and Herndon water quality - whether moving, choosing between the two, or curious about a relative's water - here is what the data shows.
Hardness comparison
Harrisonburg has somewhat harder water at 110 PPM versus Herndon at 110 PPM, a difference of 0 PPM. Herndon has moderate hardness where a softener is optional.
Water sources and why they differ
Water sources differ: Harrisonburg draws from North River & Dry River, while Herndon uses Potomac River (Fairfax Water). Both use similar source types, but local geology creates the hardness variation.
Contaminant concerns
PFAS contamination is a concern in Herndon (12.5 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 | Harrisonburg | Herndon |
|---|---|---|
| Hardness | 110 PPM | 110 PPM |
| GPG | 6.4 | 6.4 |
| TDS | 153 PPM | 185 PPM |
| PFAS | 0 ppt | 12.5 ppt |
| Lead | 3.6 ppb | 0.4 ppb |
| Chlorine | 0.3 mg/L | 1.4 mg/L |
| Level | Moderately Hard | Moderately Hard |