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.
Explore→Salt-Free Conditioner
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→Whole-Home Ozone System
Generates ozone on site to oxidize iron, manganese and sulfur and to disinfect — then filters the solids out. Installed whole-home, most often on wells.
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.
Read guide→Buying Guide
Reverse Osmosis vs. Whole-House Filtration: Which Do You Need?
RO and whole-house filtration solve different problems. Here's how each works, what each removes, and how to decide — or whether you need both.
Read guide→Basics
Is My Tap Water Safe? How to Read Your Water Quality Report
Your utility's annual water quality report (CCR) is full of acronyms. Here's how to actually read it, what the numbers mean, and where the report stops telling the whole story.
Read guide→
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