RO System Guides publishes practical information about reverse osmosis systems, under-sink water filters, countertop filters, whole-house filtration, and common drinking water contaminants. Our goal is to help readers understand which type of water filtration system may fit their home, water source, installation limits, and maintenance budget.
How we choose topics
We prioritize topics that help homeowners make safer and better-informed water filtration decisions. This includes buying guides, comparison guides, installation and maintenance guides, and articles about contaminants such as lead, arsenic, chlorine, fluoride, nitrates, PFAS, microplastics, and sediment.
How we research articles
Our editors review manufacturer documentation, product manuals, warranty information, certification claims, public certification databases, and guidance from recognized water quality organizations where available. For health-adjacent topics, we prefer primary or authoritative sources such as EPA, CDC, NSF, WQA, and manufacturer technical documentation over unsupported claims.
Affiliate disclosure and independence
Some articles contain affiliate links. If a reader buys through those links, RO System Guides may earn a commission at no extra cost to the reader. Affiliate relationships do not determine whether a product is included, how a product is ranked, or whether we mention drawbacks. We aim to explain who a product is best for, who should avoid it, and what tradeoffs matter before purchase.
Updates and corrections
Water filtration products, prices, certifications, availability, and standards can change. We update articles when we identify meaningful changes, such as discontinued products, changed specifications, new certification information, or outdated recommendations. If we find an error, we correct it as soon as practical and update the page when the correction materially affects the article.
Medical and safety note
Our content is educational and should not replace professional water testing, plumbing advice, or medical advice. If you suspect unsafe drinking water, test your water through a qualified lab or contact your local water authority. Product claims should be verified against current certification data and the specific contaminant concerns in your home.
Contact
Readers can contact us through the Contact Us page with questions, corrections, product updates, or source recommendations.
