How we research and rank
Our only asset is that you can trust the recommendation. Here is exactly what our rankings are based on — and what they are not.
What our rankings are based on
- Your water first. Every recommendation starts from the contaminant, not the product. We match systems to what a water test actually shows.
- Manufacturer-published specs for flow rate, capacity, and what each system removes.
- Third-party standards — NSF/ANSI 42, 44, 53, and 58, plus EPA limits — as the yardstick for what "removes" means.
- Real ownership cost — salt, cartridges, wastewater, and maintenance cadence — weighted over sticker price.
- Documented user reports from owners running these systems on real wells.
What they are not based on (yet)
We do not currently run these systems in our own lab. When we say a system removes iron or softens water, that reflects manufacturer specs and certification standards — not first-hand testing we performed. When that changes, we'll say so on the page and show the data.
How we handle affiliate links
Some links on this site are affiliate links: if you buy through one, we may earn a commission at no additional cost to you. Commissions never change the ranking. When a cheaper or salt-free system is the right answer for your water, that's what we recommend — every pick also states who should skip it.