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As the largest private water utility in Arizona and New Mexico, EPCOR understands the obligation we have to protect our more than 350,000 customers. Every day, we're focused on water quality and safety, we test for state and federal standards, and we prepare to invest more in our precious infrastructure.

Now and in the future

Keeping your water safe is about more than testing and notifying. It's also about operating a complex, fragile system. The American Society of Civil Engineers estimates that in Arizona alone, more than $9.7 billion needs to be invested in water infrastructure in the next 20 years.

EPCOR is committed to the communities we serve today, and into the future. We've announced plans to invest more than $500 million in the precious underground infrastructure that delivers water to homes, families, schools and businesses every day.

Our process and commitment

EPCOR tests water in our systems daily, and adheres to stringent Federal and local guidelines. We check water 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.

In the rare event that we identify something potentially harmful in the water, we follow federally prescribed procedures for notifying the public and conducting further monitoring.

Every year, we publish a water quality report that provides details on the water in your service area. You can read yours now at

Where we excel

EPCOR's commitment to safety and water quality is one that we take seriously, and we're proud that our colleagues have taken notice.

In 2016, EPCOR was recognized with 21 AZ Water Awards for our commitment to quality and safety, and in 2014 our Anthem Water Treatment Facility was recognized with the coveted Director's Award of Recognition from the Safe Drinking Water Partnership, a joint program of the U.S. Environmental Protection Agency and the American Water Works Association.

What about Chromium-6?

Chromium is an odorless and tasteless metallic element that is found naturally in rocks, plants, soil, volcanic dust, humans and animals. The most common forms of chromium that occur in natural waters in the environment are trivalent chromium (chromium-3) and hexavalent chromium (chromium-6). In the southwestern United States, chromium naturally occurs from the erosion of geologic deposits.

The Safe Drinking Water Act requires EPA to determine the level of contaminants in drinking water at which no adverse health effects are likely to occur. The current drinking water maximum contaminant level (MCL) for Total Chromium at 0.1 milligrams per liter (mg/L) or 100 parts per billion (ppb).

EPCOR Water regularly tests its water supply for Total Chromium. To date, we have not had a case where a chromium level has exceeded the maximum contaminant level. In fact, the results of our tests detect Total Chromium well below the EPA maximum contaminant level.

What about lead?

Lead pipes became a concern across the country once we learned the news from Flint. Lead, however, should not be a significant concern in the Southwest. We are unaware of any service lines made of lead in our districts.

Because much of the Southwest was developed after World War II, lead service lines are extremely rare. Our population booms occurred well after 1930, when most cities stopped installing lead service lines and switched to different materials for infrastructure use.