Water Treatment · FAQ

Water treatment FAQ

The three questions that matter most are: what is actually in my water (answer: read your utility's Consumer Confidence Report, delivered annually by July 1, or test a well through a state-certified lab), what technology is certified to address it (NSF/ANSI 42, 53, 58, 44 or 55 depending on the problem), and what should it cost (roughly $1,200–$3,800 installed for a salt-based softener and $170–$580 for an under-sink filter).

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We can't tell you whether your water is safe. Nobody can without a test, and any company that implies otherwise before testing is selling. What we can tell you is where the free, independent data lives and what each treatment type is genuinely certified to do.

The most common expensive mistake is buying a whole-house system to solve a single-tap problem. The second is buying a softener when the complaint was taste, or a filter when the problem was scale. The third is signing during an in-home demonstration. All three are avoidable with a test result and 48 hours.

If you do sign at home and change your mind, the FTC Cooling-Off Rule generally gives you three business days to cancel a sale over $25 made at your residence, and requires the seller to disclose that right. Check your contract and act inside the window rather than arguing about it afterward.

How to choose

Answer "what's in my water" first: Every other question is unanswerable until you have a CCR or a lab result in hand.
Ask for the standard and the claim: 42 for aesthetics, 53 for health effects, 58 for RO, 44 for softeners, 55 for UV. Get it in writing with the model number.
Right-size the scope: Drinking water complaints are usually a $170–$580 under-sink job, not a whole-house project.
Sleep on any four-figure decision: Nothing about water treatment is an emergency except bacterial contamination on a well, and that's a health department call.
Keep the paperwork: Contract, warranty PDF, certification listing, and the lab report. That folder is what protects you two years from now.

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FAQ

Water Treatment faq — common questions

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Do I actually need a water treatment system?

Only your water test can answer that. Read your Consumer Confidence Report first — it's free, required annually by July 1, and often shows that your complaint is aesthetic and cheaply fixed.

How much should I expect to pay?

In 2026, roughly $1,200–$3,800 installed for a salt-based softener, $850–$1,400 for whole-house carbon/mineral/sediment filtration, $4,800–$8,000 for whole-house reverse osmosis, and $170–$580 for an under-sink point-of-use system.

Should I let a company do a free water test in my home?

You can, but treat it as a sales appointment and verify anything it finds with a state-certified lab. A professional analysis costs $130–$200 and your health department may test well water free.

Can I cancel after signing at home?

The FTC Cooling-Off Rule generally provides three business days to cancel an in-home sale over $25, and the seller must disclose that right. Read your contract and cancel in writing inside the window.

Is a water softener the same as a water purifier?

No. A softener addresses hardness minerals under NSF/ANSI 44. Purification-type claims fall under NSF/ANSI 53 for health effects, 58 for reverse osmosis, or 55 for UV. They are different devices for different problems.

Sources

Where these figures come from

EPA — Consumer Confidence Reports · retrieved 2026-07-26
EPA — Protect Your Home's Water (private wells) · retrieved 2026-07-26
HomeGuide — Water Softener Cost · retrieved 2026-07-26
HomeGuide — Water Filtration System Cost · retrieved 2026-07-26
ANSI — NSF/ANSI Drinking Water Treatment Standards · retrieved 2026-07-26
FTC — Cooling-Off Rule · retrieved 2026-07-26