Our commitment to water safety

Water is our most precious resource. As the largest private water utility in Arizona and New Mexico, we understand the obligation we have to protect our more than 360,000 customers.

We test water in our systems daily, and adhere to stringent federal and local guidelines, including checking at various stages of its cycle — from wells and canals to the tap itself — to ensure that you and your family are drinking safe water. It's a process our skilled analysts and scientists repeat 21,000 times a year to make sure water meets our standards.

Daily testing

Every day, we conduct water quality testing. We examine lab results, note any changes in water quality, and then compare them to local and national standards and expectations. The tests look for and measure microorganisms, organic and inorganic contaminants, and physical water quality parameters including, but not limited to:

  • Microorganisms: bacteria, viruses, cryptosporidium, giardia.
  • Disinfectants and Disinfection Byproducts: chlorine, trihalomethane–TTHMs, haloacetic acid-HAA5.
  • Inorganic chemicals: arsenic, lead, copper, asbestos, nitrates.
  • Organic chemicals: PCB, TCE, herbicides, pesticides, petroleum products.
  • Radionuclides: radium 226 and 228.
  • Physical Parameters: hardness, pH, turbidity.

Industry recognition

Safety is a commitment we take seriously, and our colleagues have taken notice:

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