GUIDE · CONSUMER PROTECTION

New homeowners: the "free water test" and the softener pitch.

New homeowners are a favorite target for high-pressure water treatment sales. Here is what the demos really show and what a softener really does.

Watch the 2-minute version of this guide.

What the "free water test" really shows.

Common in-home demos use color-change drops or a small "electrolysis" box with metal rods. Both make ordinary tap water look alarming. The drops react with harmless dissolved minerals, and the brown in an electrolysis demo comes from the metal rods themselves corroding. Even bottled spring water can "fail" these demos.

A real test comes from a state-certified laboratory and reports each contaminant by name, its measured level, and the legal limit.

What a water softener does, and doesn't do.

A softener swaps the calcium and magnesium in your water (the minerals that cause "hardness") for sodium. That helps pipes, water heaters and fixtures resist scale.

• It is not a drinking-water safety device, and it is not designed to remove contaminants such as PFAS, lead or nitrate.
• It adds sodium: roughly 50 mg of sodium per liter for every 100 mg per liter of hardness removed.
• Whole-house systems are often sold for thousands of dollars.

Safe drinking water, simply.

For drinking and cooking, a certified countertop RO unit (about $200) does the job without a contract. Fill a glass carafe, keep it covered in the fridge, use it within two or three days, and wash the carafe every week. RO water has no chlorine left in it, so clean, cold storage matters.

Protect yourself.

• Never sign the same day.
• Read your city's free annual water quality report.
• If you want a test, use a state-certified lab.
• Know your right to cancel: under the FTC Cooling-Off Rule, most sales of $25 or more made in your home can be canceled until midnight of the third business day. In California, home solicitation contracts give 3 business days, and 5 business days for senior citizens.

The seller must give you notice of your cancellation right and cancellation forms at the time of the sale. If they didn't, that is a red flag.

Sources.

General information, not legal advice.