Global Water Resources issued another statement at noon today, encouraging water customers to continue heeding a boil water advisory. 

The advisory was initially released yesterday around 5:30 p.m., following two preliminary tests that indicated tap water could be contaminated with E. coli. The presence of E. coli in the water system has not been confirmed and repeat testing is underway.   

The Arizona Department of Environmental Quality regulations require repeat samples at and near the location where the two preliminary positive samples were originally taken.  

What customers need to know  

As of Oct. 7, 2026, you should boil all water for drinking, cooking, making ice, brushing teeth, or washing dishes. 

• Bring water to a rolling boil for at least one minute, then let it cool before using. 

• Bottled water may be used as an alternative. 

• Boil your tap water even if you filter it through a home water filter or a pitcher that filters water. 

• Do not use un-boiled tap water for drinking or cooking, making ice or beverages, brushing teeth, preparing infant formula or food. 

• E. coli bacteria can make you sick and are a particular concern for people with weakened immune systems. 

• Boiling water kills bacteria, viruses, and other organisms that can cause disease. This precaution helps protect your health and that of your family. See advice from your health care provider if you have health concerns. 

• If you have a compromised immune system, have an infant, or are elderly, you may be at increased risk and should seek advice about drinking water from your health care providers. 

When will customers get an update 

The water company is still waiting for testing results from a third-party laboratory that will confirm whether E. coli is present in the Global Water system. Testing results take approximately 24 hours from repeat sampling. 

In the meantime, Global Water advised they are utilizing all appropriate measures, including activating their emergency operation center in case of contamination. 

Global Water plans to provide an update after the 24-hour testing window, which began around5:30 p.m. yesterday. 

Visit the website for public health information and updates at GRWesources.com/public-notice or contact customer service at 866-940-1102.