Water quality varies dramatically depending on where you live, your water source, and the age of your local infrastructure. Municipal tap water can contain chlorine, lead from aging pipes, PFAS (forever chemicals), microplastics, and agricultural runoff — even when it technically meets EPA standards. Well water users face additional risks from bacteria, nitrates, and naturally occurring arsenic or radon.
The problem is that no single filter removes everything. Pitcher filters handle chlorine taste but miss lead and PFAS. Reverse osmosis removes nearly all contaminants but wastes water and strips beneficial minerals. Whole-home carbon systems are great for sediment and chlorine but won't touch dissolved heavy metals. Choosing the wrong system means spending hundreds (or thousands) of dollars on protection you don't actually need — or worse, assuming you're protected when you're not.
This selector tool asks about your water source, the contaminants you're most concerned about, your household size, and your budget to recommend the right type of filtration system. Whether you need a simple countertop filter, an under-sink reverse osmosis unit, or a full whole-home filtration setup, you'll get a specific recommendation with product suggestions and realistic pricing. If you've already had your water tested, you can input your known contaminants for an even more targeted result.
Best value RO system with alkaline remineralization. Handles most contaminant concerns for drinking water.
For whole-home chlorine removal, consider adding an iSpring WGB32B whole-house carbon filter ($350-$600 installed) as an upgrade. Together they cover drinking water purity and whole-home taste/odor.
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Frequently Asked Questions
How do I know what's in my water?
The best way to find out is to request your local utility's annual Consumer Confidence Report (CCR), which lists detected contaminants. For well water or deeper analysis, you can order a certified lab test kit from Tap Score or SimpleLab for around $100-200. These tests cover lead, PFAS, bacteria, nitrates, and other common pollutants your CCR may not detail.
Whole-home vs under-sink filtration — which is better?
It depends on your goals. Whole-home systems filter every tap, shower, and appliance, which is ideal for sediment, chlorine, and hard water issues. Under-sink reverse osmosis systems are better for targeted drinking water contaminants like PFAS, lead, and microplastics, and cost significantly less to install. Many households benefit from combining both.
How much does a whole-home filtration system cost?
Whole-home filtration systems typically cost between $1,000 and $4,000 for the unit, plus $500-1,500 for professional installation. Ongoing filter replacements run $100-400 per year depending on the system. Simpler carbon-based systems are on the lower end, while multi-stage systems with UV treatment and water softening are at the higher end.
Do I need a water softener too?
A water softener addresses hard water (high calcium and magnesium), which causes scale buildup in pipes and appliances. It's a separate concern from contaminant filtration. If you notice white scale on faucets, soap that doesn't lather well, or dry skin after showers, a softener is worth adding. Many whole-home systems can be paired with a softener, but they serve different purposes.
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