EPA data · 501 cities · Updated 2026 Q2
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Free · Real EPA records · No signup · 501 cities
Phoenix, Arizona
- Arsenic — violation on record
- PFAS detected
- Very hard water
Serving 1,719,141 people
Source: EPA SDWIS · 2026 Q2
1 of 501 city reports
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Water Softener
Swaps the calcium and magnesium that cause hard water for sodium — so scale stops forming.
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Changes how hardness minerals behave so scale doesn't stick — no salt, no drain, no softening.
Explore→Reverse Osmosis
Pushes water through a fine membrane that removes the dissolved solids most filters miss.
Explore→Whole-House Carbon Filter
A point-of-entry carbon bed that strips chlorine, chloramine, and chemical taste from every tap.
Explore→Sediment Filter
A first-stage barrier that catches sand, silt, and rust before they reach the rest of the home.
Explore→UV Purifier
Shines UV light through the water to inactivate bacteria, viruses, and other microbes — no chemicals.
Explore→Iron & Sulfur Filter
Oxidizes dissolved iron and rotten-egg sulfur into solids, then filters them out — a well-water staple.
Explore→Water Test Kit
The first step — measures what's actually in your water so you treat the real problem.
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Buying Guide
Water Softener vs. Conditioner: What Actually Works for Hard Water
Salt-based softeners and salt-free 'conditioners' are sold side by side, but they work differently and deliver different results. Here's the honest comparison for hard water.
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How Much Does a Water Softener Cost? (2026 Price Breakdown)
A plain-English breakdown of what a water softener actually costs — by type and capacity, plus installation, salt, and the factors that drive the price up or down.
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Understanding Your Water Score
What the 0–100 Water Score means, how it's calculated from EPA data, and what to do about it.
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