What Water Filter Do I Need? (Free Quiz)

The quiz routes you to the right category of filter based on your water source, concerns, and living situation. Within that category, you'll still want to compare specific products. Think of it as narrowing from 13 types down to the 1-2 that actually make sense for you.

Ideally yes, especially if you're on well water. A basic water test ($30-50 from a local lab) tells you exactly what's in your water so you can match it to the right filter. For city water, your utility publishes an annual Consumer Confidence Report — search for it before buying.

No single filter removes every possible contaminant. Reverse osmosis comes closest but wastes water and strips minerals. Most people don't need to remove everything — they need to remove the specific things in their water. That's why starting with your water source and main concern matters more than buying the most expensive system.

Pitchers, faucet-mount filters, countertop systems, and gravity filters all work in rentals with zero installation. Under-sink filters can work too if your landlord approves, since they're removable. Skip whole-house and RO systems unless your landlord is onboard.

Most people underestimate ongoing costs. Pitcher filters run $40-80/year. Faucet and under-sink filters run $30-60/year. Reverse osmosis membranes last 2-3 years but full annual filter costs are $50-100. Whole house sediment filters are $20-40/year but carbon blocks are $100-200. Always check the replacement schedule before buying.

Most city tap water meets EPA standards, so it's technically safe. But EPA standards haven't been updated for many contaminants, including PFAS. And "safe" isn't the same as "ideal" — chlorine is safe to drink but affects taste and smell. If your water tastes fine and you're on city water, a basic pitcher is plenty. If you're on well water or have specific health concerns, test first.