Scottsdale Water Quality Report
Population: 260K+ · TDS: 500+ ppm · 4 contaminants above EWG health guidelines
Water Hardness
Scottsdale water measures 20.1 grains per gallon (gpg) — classified as Extremely Hard.
Contaminants Detected
All contaminants shown exceed EWG health guidelines, even if they meet federal legal limits. The worst offender exceeds guidelines by 642x.
| Contaminant | Detected | EWG Guideline | Times Above |
|---|---|---|---|
Total Trihalomethanes (TTHMs) Disinfection byproducts linked to bladder cancer. Formed when chlorine reacts with organic matter in water. | 36.0 ppb | 0.2 ppb | 180x |
Chromium-6 Toxic metal linked to cancer. Found in Scottsdale groundwater at levels exceeding health guidelines. | 0.36 ppb | 0.03 ppb | 12x |
Haloacetic Acids (HAA9) Chlorine disinfection byproducts. Associated with increased cancer risk at levels far above health guidelines. | 38.5 ppb | 0.06 ppb | 642x |
Uranium Radioactive element naturally present in Arizona geology. Kidney toxin and cancer risk factor. | 4.1 ppb | 1.7 ppb | 2.4x |
What This Means For You
Scottsdale's water is legally “safe” according to federal standards — but those standards were last updated decades ago. The EWG sets health guidelines based on the latest science, and Scottsdale exceeds them on 4 contaminants.
With a hardness level of 20.1 gpg, your water is classified as extremely hard. That means accelerated scale buildup in your pipes, water heater, and appliances. Most water heaters in Scottsdale lose 25–40% of their efficiency within 5 years from hard water deposits.
Recent: Scottsdale has some of the hardest water in the entire Phoenix metro, with hardness levels exceeding 20 grains per gallon.
Flo Says:
City data shows averages across the whole system. Your home could be better or worse depending on your pipes, neighborhood, and how far you are from the treatment plant. A free in-home test shows you exactly what's coming out of your tap.
Book Your Free Water Test in Scottsdale
City reports show averages. A free in-home test shows you exactly what's coming out of your tap.
Book Your Free Water Test