Arizona's extremely hard water (10-20+ GPG) leaves a film of calcium and magnesium on your skin after every shower, disrupting your skin's natural moisture barrier and exacerbating dryness, eczema, and irritation. Combined with Arizona's low humidity (often under 15%), hard water is a major contributor to the skin problems that plague Valley residents — especially those who moved from areas with softer water.
If your skin "went bad" after moving to Arizona, the culprit is almost certainly the water, not just the dry air.
How Hard Water Damages Your Skin
When you shower in hard water, calcium and magnesium minerals don't rinse off your skin cleanly. They leave behind an invisible film — a residue that:
- Clogs pores: The mineral film mixes with soap to form a sticky residue (soap scum) that settles into pores
- Disrupts the skin barrier: The natural lipid layer on your skin gets coated, preventing it from retaining moisture
- Prevents soap from rinsing: That "squeaky clean" feeling after showering in hard water? It's actually soap scum on your skin, not cleanliness
- Increases pH: Hard water is more alkaline, which disrupts the skin's natural slightly acidic pH (4.5-5.5)
Research published in the Journal of Investigative Dermatology found that hard water significantly increases skin sensitivity and can trigger eczema flare-ups, even in people without a history of eczema.
Arizona-Specific Factors
- Extreme low humidity: 5-15% relative humidity is common in Phoenix. Your skin is already losing moisture to the air.
- Higher water temperatures: Hot showers (common after being outside in 110F heat) open pores wider, allowing more mineral penetration.
- More showers: Arizonans shower more frequently due to heat and sweat, multiplying the exposure.
- Chlorine: The disinfectants in Arizona water add another drying factor on top of the hardness minerals.
Signs Hard Water Is Affecting Your Skin
- Persistent dryness despite using moisturizer
- Itchy skin after showering
- Eczema flare-ups that started after moving to Arizona
- Skin feels tight and uncomfortable after bathing
- Breakouts, especially along the jawline and forehead
- Hair that feels dry, brittle, or has lost its shine
The Fix: Water Softener
A whole-house water softener removes the calcium and magnesium before the water reaches your shower. The difference is noticeable from the first shower — your skin feels slippery (that's your natural oils working correctly, not residue), soap rinses cleanly, and your skin retains moisture much better.
Many Arizona residents report that their dry skin and eczema improve dramatically within 2-4 weeks of installing a softener. It's one of the most commonly cited quality-of-life improvements.
Cost: $1,500-3,500 installed. For a cheaper intermediate step, a shower-head filter ($20-40) can reduce chlorine but won't address hardness minerals effectively.
Not sure how hard your water is? Get a free test kit and see the number for yourself.
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
Can hard water cause eczema?+
Research shows hard water can trigger and worsen eczema by disrupting the skin barrier and increasing sensitivity to irritants. A study in the Journal of Investigative Dermatology found hard water combined with soap significantly increases skin irritation. At Arizona's 10-20+ GPG hardness, this effect is pronounced.
Will a water softener help my dry skin?+
Most Arizona residents report noticeable skin improvement within 2-4 weeks of installing a water softener. Soft water allows soap to rinse cleanly, preserves your skin's natural oils, and eliminates the mineral film that disrupts moisture retention.
Do shower head filters work for hard water?+
Shower head filters reduce chlorine (which helps with dryness) but do NOT soften water. They cannot remove the calcium and magnesium minerals that cause the skin barrier disruption. A whole-house water softener is the effective solution for hard water skin issues.
Keep Reading
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.