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Waterloo Water Works · Cedar River alluvial wells (groundwater). Your water meets federal legal limits — but those limits haven't been updated in nearly 20 years.

⚠ PFAS DETECTED

Perfluorohexane sulfonate (a 'forever chemical') at 1,747x the health-based guideline. The EPA set its first-ever national PFAS limits in 2024 — reverse osmosis is one of the few proven ways to reduce it.

Above health guidelines

1,747x

PFAS (PFHxS) vs. guideline

214x

Arsenic vs. guideline

Bottom line: 16 contaminants came back above the latest health guidelines — led by PFAS 'forever chemicals', arsenic and farm-runoff nitrate. The good news: the right system reduces all of them.

Detected above health-based guidelines

Level found vs. a non-enforceable, health-based guideline. Detection data comes from public Iowa DNR & U.S. EPA testing records (2021–2023); health guidelines are drawn from state public-health authorities (such as California's OEHHA) and peer-reviewed research, and are far stricter than federal legal limits. Water that exceeds a health guideline can still meet all legal standards.

Perfluorohexane sulfonate (PFHxS, a PFAS) · PFAS 'forever chemical'

1.75 ppt detected · guideline 0.001 ppt · legal limit 10 ppt

1,747x

Arsenic

0.856 ppb detected · guideline 0.004 ppb · legal limit 10 ppb

214x

Total trihalomethanes (TTHMs) · disinfection byproduct

10.6 ppb detected · guideline 0.15 ppb · legal limit 80 ppb

70x

Haloacetic acids (HAA9) · disinfection byproduct

3.71 ppb detected · guideline 0.06 ppb · no legal limit

62x

Nitrate · farm runoff

5.88 ppm detected · guideline 0.14 ppm · legal limit 10 ppm

42x

+ 10 more · Dibromoacetic acid, Haloacetic acids, Dibromochloromethane, Chloroform…

2.6–33x

Recommended for your home: Whole-Home Softener + Reverse Osmosis

A whole-home softener handles Iowa's hard water and protects your plumbing; 7-stage reverse osmosis at your kitchen tap is one of the most effective ways to reduce the contaminants above.

Helps reduce:✓ PFAS✓ Arsenic✓ Nitrate✓ Disinfection byproducts✓ Hard-water scale

🛡 Lifetime parts warranty 🧪 Free in-home water test 🛠 Installed by licensed plumbers

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No pressure, no obligation — or call (319) 536-1924

Based on publicly available drinking-water testing data from the Iowa Department of Natural Resources and the U.S. Environmental Protection Agency (detections 2021–2023; radiologicals 2018–2023). Levels are utility-wide annual averages and meet federal legal limits; 'health-based guideline' refers to non-enforceable health goals set by federal or state public-health authorities. Informational only — not a medical or safety determination. Your home's water, especially on a private well, may differ; a free in-home test measures your actual water.