About · HealthyWater.us

Choose the right water filter.

An independent guide to water filtration and testing. We compare reverse osmosis (RO) systems, under-sink filters and countertop filters available in the United States and Canada. Polish version.

Compare RO systems How we evaluate filters

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How we evaluate water treatment systems?

Design and filters

We review RO membranespumps, construction and availability of replacement filters.

Certification NSF/ANSI

We verify the exact model and certification scope in NSF and WQA databases. See Waterdrop G3P800 model details.

Water testing

Compare sample results before and after filtration. Laboratory tests show what changed in the sample.

Costs and ownership

We review operating cost, service needs, reported failures and leaks. More in the RO FAQ.

Tap water or a private well?

Start with water quality. Check the utility report or order a laboratory test.

Check your water →Laboratory water tests →Water filtration FAQ →

How the guide is funded?

All comparisons, answers and water testing guides are free. An affiliate purchase may earn a commission at no extra cost to you. Commission does not determine coverage. A product that no longer fits our criteria leaves the comparison.

Talk to us about your water

Questions about water filters, RO systems or laboratory testing? We answer in English and Polish.

Phone / SMS

(773) 800-1520

Chicago time (Central)

mail@healthywater.us

Email us

Mailing address

PO BOX 1000

Mount Prospect, IL 60056, USA