Where do I start with home water filtration?

Start with a free water test. Before you shop for a system, find out what's actually in your water. Then match the system to the problem. That's the only way to avoid buying the wrong thing.

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Homeowner Guides

Residential Water Filtration: A Beginner's Guide

If you're just starting to research home water filtration, start here. The basics, in plain English.

H2OGeneration H2OSeptember 27, 2026

Beginner's guide to residential water filtration showing common system types

Start With the Problem, Not the Product

The biggest mistake new homeowners make is buying a system before they know what's in their water. Water filtration isn't one-size-fits-all — different systems solve different problems. The right first step is a free test that tells you what you're dealing with.

The Three Main Types

1. Whole House Filtration

Installed where water enters your home, so every faucet and shower gets filtered water. Best for chlorine taste and odor, sediment, and whole-home water quality. It does not soften water or match RO for dissolved contaminants.

2. Reverse Osmosis (Under-Sink)

A dedicated system under the kitchen sink that gives you highly filtered drinking water at one tap. Best for the water your family drinks and cooks with. It doesn't treat the whole home.

3. Water Softening

Removes hardness minerals that cause scale, spots, and dry skin throughout the home. Best for hard water — the most common issue in the Central Valley. It doesn't improve taste or reduce dissolved contaminants.

How to Decide

Match the system to the problem: chlorine taste → whole house filter; hard water → softener; drinking water quality → RO. If you have more than one concern — very common here — the systems work together. We'll tell you exactly which combination your home needs after a free test, with clear pricing before you decide.

See our residential water filtration options, or book a free test to get started.

Frequently Asked Questions

It depends on what your water test shows and what you want to improve. The three main types are whole house filtration (every tap), reverse osmosis (drinking water), and water softening (hard water). Many homes use a combination. A free test tells you which makes sense for yours.

Not Sure What’s In Your Water?

Schedule a free in-home water test with Generation H2O. We’ll test your water, explain what we find, recommend the appropriate solution if one is needed, and provide clear pricing before you decide.