Everything to Consider When Choosing a Home Water Filter System

If you're considering a home water filter, start with where your water comes from and what a test shows. More expensive is not always better. See benefits of filtered water.

Where Does Your Water Come From?

Well Water

Wells are not regulated like city water. Test at least yearly through a certified lab. Common issues are sediment, iron, nitrates, and agricultural chemicals. A sediment prefilter is often step one. Bacteria on a well is a separate treatment problem — not a job for a countertop Berkey.

Public Water

The Safe Drinking Water Act sets standards for many contaminants. Pipes can still add metals. Cities add chlorine during treatment and often add fluoride. Taste is the complaint most people notice. See NPR on U.S. drinking water.

What Contaminants Do You Need to Filter?

Home kits are a start. A certified lab is better, especially for wells. Typical tests include metals, VOCs, pesticides, nitrates, dissolved solids, fluoride, and hardness.

Match the filter to the results. NSF listings show what a product is certified to reduce: NSF standards.

Types of Home Water Filter Systems

Point-of-entry treats the whole house. Point-of-use treats one tap or a countertop unit.

Activated Carbon

Good for chlorine, many VOCs, and taste. Gravity carbon systems like Berkey also have published metal-reduction data — read the specific lab sheet instead of assuming all carbon is the same.

UV

UV is a separate add-on some well owners use after a bacteria test. It does not replace carbon for chlorine or metals.

Reverse Osmosis

Strong on nitrates, dissolved solids, pesticides, metals, and fluoride. Wastes water. See RO efficiency.

Water Softeners

They swap hardness minerals for sodium. That is not a drinking-water chemical filter. See does a water filter soften water?

Who Uses the Water?

Filter drinking and cooking water first. Whole-house gear is extra if showers or scale are the issue. Nitrates matter more for infants. Fluoride is a separate choice; see filters that reduce fluoride.

Budget

Whole-house systems can run hundreds to thousands. Under-sink RO is often a few hundred. Cheap pitchers may only change taste. See Do Brita filters remove fluoride?

The Benefits of Berkey

Berkey countertop systems filter municipally treated tap water without electricity. Sizes fit different households. Official replacements are the Phoenix filters.

They are not for untreated stream or well water.

Shop Berkey systems.