Gaithersburg vs Bel Air Water Quality
Side-by-side water quality comparison for two Maryland cities.
If you are comparing Gaithersburg and Bel Air water quality - whether moving, choosing between the two, or curious about a relative's water - here is what the data shows.
Hardness comparison
Gaithersburg has somewhat harder water at 110 PPM versus Bel Air at 90 PPM, a difference of 20 PPM. Bel Air has moderate hardness where a softener is optional.
Water sources and why they differ
Water sources differ: Gaithersburg draws from Potomac River (WSSC), while Bel Air uses Deer Creek Reservoir. Both use similar source types, but local geology creates the hardness variation.
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 | Gaithersburg | Bel Air |
|---|---|---|
| Hardness | 110 PPM | 90 PPM |
| GPG | 6.4 | 5.3 |
| TDS | 185 PPM | 155 PPM |
| PFAS | 9.26 ppt | 0 ppt |
| Lead | 1.1 ppb | 3 ppb |
| Chlorine | 1.4 mg/L | 1.3 mg/L |
| Level | Moderately Hard | Moderately Hard |
FAQ
Which has harder water, Gaithersburg or Bel Air?
Gaithersburg has harder water at 110 PPM compared to Bel Air at 90 PPM. That is a difference of 20 PPM.
Do I need a water softener if I move from Bel Air to Gaithersburg?
Probably not. At 110 PPM, the water is manageable without a softener for most homes.
Is Bel Air water safe to drink?
Bel Air water meets EPA safety standards. No contaminants exceed health guidelines in our data.