A whole-house water filter (point-of-entry system) treats all water entering your home, primarily removing chlorine, sediment, and some organic contaminants — but it does NOT soften hard water or remove dissolved minerals like arsenic and chromium-6. For most Arizona homes, a whole-house filter is a useful add-on but should not be the only treatment system.
What a Whole-House Filter Does
- Sediment pre-filter (5-20 micron): Catches sand, rust, and particulate matter
- Activated carbon: Removes chlorine, chloramine, some VOCs, improves taste/odor
- Optional KDF media: Reduces some heavy metals and inhibits bacterial growth
What It Does NOT Do
- Does not soften water: Your 15+ GPG hard water stays 15+ GPG
- Does not remove dissolved minerals: Arsenic, chromium-6, nitrate, uranium pass through
- Does not remove PFAS effectively: Insufficient contact time for meaningful reduction
- Does not reduce TDS: Mineral content stays unchanged
The Arizona Treatment Hierarchy
If you can only install one system, here's the priority order:
- Water softener — addresses the biggest financial impact (hard water damage)
- Under-sink RO — addresses the biggest health concern (contaminants in drinking water)
- Whole-house carbon filter — addresses comfort and chlorine throughout the house
When a Whole-House Filter Makes Sense
- You already have a softener and want chlorine-free shower water
- You're sensitive to chlorine/chloramine
- You want to extend the life of your softener resin
- You have well water with sediment issues
Cost
- Equipment: $1,000-3,000
- Installation: $500-1,500
- Media replacement (every 3-5 years): $200-500
- Pre-filter replacement (every 3-6 months): $10-30 each
Book a free water test and we'll help you figure out which components your home actually needs.
Want answers specific to your home?
A 15-minute in-home water test tells you exactly what's coming out of your taps — hardness, TDS, chlorine, and more.
Book Your Free Water TestFrequently Asked Questions
Does a whole-house filter replace a water softener?+
No. A whole-house carbon filter removes chlorine and some organic compounds but does not remove hardness minerals. Your scale buildup and appliance damage problems will continue without a separate water softener.
How often do whole-house water filters need to be changed?+
The sediment pre-filter should be changed every 3-6 months. The main carbon media lasts 3-5 years depending on usage. Annual professional inspection is recommended.
Can I install a whole-house water filter myself?+
If you're comfortable with basic plumbing, a DIY installation is possible. You'll need to cut into your main water line and install bypass valves. Professional installation ($500-1,500) is recommended for most homeowners.
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About The Very Good Water Company
We help Arizona homeowners understand what's really in their water — and what to do about it. No scare tactics, no upsells. Just independent data, honest recommendations, and systems that actually work for desert water. Based in Mesa, serving the entire Valley.