Seven Things a Home Water Treatment Proposal Should Put in Writing

On Oct. 15, 2026, thousands of people, companies and organizations marked the 12th annual Imagine a Day Without Water, a national advocacy day focused on safe, affordable and reliable drinking water, according to Water Finance and Management's account of the observance.

That national message has a practical household counterpart. Water must not only reach the tap. Residents also need a reliable way to evaluate any equipment proposed for use after it enters the home. That can be difficult when one company recommends a softener, another recommends filtration and a third bundles several devices into one price.

The most useful response is not to begin with brands. Begin by asking each provider for a written proposal that answers the same seven questions.

1. What evidence defines the problem?

Ask the provider to identify every result used in the recommendation. For a home on a public system, that may include the utility's water quality report and testing at the property. For a private well, it may include laboratory results tied to a collection date and sampling location.

A proposal should separate measured findings from observations such as staining, odor, scale or unpleasant taste. Those observations matter, but they do not identify every possible cause. If a sales demonstration is included, ask what it measures and whether a laboratory must confirm the finding.

2. What claim is being made for each device?

The proposal should give every component a specific job. A softener might be proposed for hardness. A filter might be proposed for a named substance or an aesthetic concern. A disinfection device would have a different purpose.

Avoid treating the phrase “water treatment system” as a complete explanation. Ask what enters the device, what the device is represented to change and what it does not address.

3. Is the exact model certified for that claim?

Certification should be documented at the model level, not implied by a logo on a brochure. Ask for the certifying organization, the applicable standard and the exact model or configuration listed.

Certification is also not a promise that one product solves every water problem. Compare the certified claim with the test result or household concern that prompted the recommendation. If they do not line up, ask the provider to explain the gap in writing.

4. How was the equipment sized?

Ask the provider to show the inputs used for sizing. Depending on the equipment, those inputs may include water use, number of residents, fixture demand, measured hardness, contaminant concentration, flow rate or available installation space.

The proposal should also state what happens if actual demand exceeds the assumption. Two systems can carry similar descriptions while having different capacities, service flow limits or replacement schedules.

5. What maintenance will the household own?

List recurring work beside each device: adding salt, replacing cartridges, changing lamps, cleaning components, scheduling service or repeating a water test. Ask who performs each task, how often it is expected and what supplies cost.

This is also the place to ask how the household will know that performance has declined. A written maintenance calendar is more useful than a general instruction to service the equipment “as needed.”

6. What does the warranty actually cover?

Request separate terms for equipment, labor and installation work. Note the warranty length, exclusions, required maintenance and the process for making a claim. Ask whether a service visit, shipping charge or replacement part could still produce an out-of-pocket bill.

If the provider offers broader coverage for home systems and appliances, compare that document separately. It should not be treated as a substitute for the manufacturer's warranty or the installer's written responsibilities.

7. What is included in the total price?

A comparable proposal should identify equipment, installation, plumbing changes, electrical work, permits if applicable, startup testing, taxes and removal of old equipment. It should also disclose financing terms separately from the cash price and identify optional items.

Before choosing, place the proposals side by side. Compare the evidence, exact model, certified claim, sizing inputs, maintenance schedule, warranty duties and complete price. If a provider has not documented those items, ask to request a documented water assessment and proposal before making the decision.

Imagine a day without water asks communities to recognize the value of reliable service. At the household level, reliability also depends on understandable records. A good proposal leaves the homeowner with more than a piece of equipment. It leaves a test trail, a defined treatment job and a realistic account of what the system will require over time.