The signs you already have hard water
Much of Northern Virginia, DC, and the Maryland suburbs draws from the Potomac and runs moderately hard. The exact number for your house — measured in grains per gallon — is a two-minute test, and it's included free in the Home Water Checkup.
What a softener does — and what it doesn't
One more local wrinkle: chloramine
DC-metro utilities disinfect with chloramine — it's why tap water here can smell like a swimming pool (we wrote a plain-English explainer). A softener alone won't touch it. That's why softeners in this region are often installed as a combined unit with whole-home carbon filtration: the carbon stage handles chlorine/chloramine taste, odor, and disinfection byproducts at every tap, while the resin stage softens.
Weighing your options
| Option | Scale & appliances | Taste & odor | PFAS, nitrate, chromium-6, lead |
|---|---|---|---|
| Do nothing | ✗ scale keeps building | ✗ | ✗ |
| Softener | ✓ | ✗ | ✗ |
| Softener + whole-home carbon | ✓ | ✓ | ✗ — needs Reverse Osmosis (RO) at the tap |
| Softener + carbon + Reverse Osmosis (RO) | ✓ | ✓ | ✓ at the drinking tap |
There's no one right answer — it depends on your hardness number, your water system's report, and what you care about. Start with the facts: look up your utility's report, then get your home's own numbers measured.
Common questions
How do I know what size softener I need?
Sizing comes from two numbers: your measured hardness (grains per gallon) and your household's water use. Oversizing wastes salt; undersizing wears out the resin. The free checkup measures the first number and asks about the second — sizing math is part of the written recommendation.
Salt-based vs. "salt-free" — what's real?
Salt-based softeners actually remove hardness minerals. "Salt-free conditioners" change how minerals behave so they scale less, but the minerals stay in the water — results vary with water chemistry. We'll tell you honestly which makes sense for your numbers, including "neither."
Does softened water taste salty?
Properly sized, no — the sodium added is small. If you're sodium-sensitive, a Reverse Osmosis (RO) tap for drinking water removes it again at the glass.
What does it cost?
It depends on your home's plumbing, size, and hardness — which is what the free Home Water Checkup measures. You get a written quote only if treatment actually makes sense for your water, and you're free to weigh your options from there. The visit is free either way, no obligation.
Find out your home's actual hardness — free
A SwiftPro technician tests your hardness and pressure, checks your water heater, and walks you through what — if anything — is worth fixing. Free, about 30 minutes, no pressure.
Book my free Home Water Checkup →Or start with the data: see your free water report by ZIP · browse all 58 local systems