By Ethan Faverino |
In a decision advancing American energy dominance, the U.S. Environmental Protection Agency (EPA) announced a final rule granting the State of Arizona full primacy to control all classes of underground injection wells under the Safe Drinking Water Act (SDWA).
This approval positions Arizona as the primary regulator for protecting its underground sources of drinking water, while developing economic growth and innovation in clean energy technologies.
The move aligns with the EPA’s Powering the Great American Comeback Initiative, which emphasizes delivering clean and safe water to every American, restoring U.S. energy leadership, and empowering states to manage their own resources with local expertise.
By delegating authority to Arizona, the federal government recognizes the state’s unparalleled understanding of its unique water challenges and business landscape.
“Efficient and effective permitting is essential to bolstering American industry and unleashing energy dominance while protecting our nation’s water resources,“ said EPA Administrator Lee Zeldin. “States know their water resources best and understand the needs of their business community; entrusting them to take on permitting makes common sense. I am excited to see the economic growth that will be spurred by granting Arizona primacy to regulate underground injection under the Safe Drinking Water Act.”
The approval enables the Arizona Department of Environmental Quality (ADEQ) to oversee permitting and enforcement for all underground injection wells, including Class I wells for hazardous waste storage— ensuring these operations occur far below drinking water aquifers—and Class VI wells, critical for carbon capture and storage.
Following technical and legal review, the EPA confirmed that Arizona’s Underground Injection Control (UIC) program fully complies with SDWA standards. ADEQ will now handle authorizations and compliance monitoring with the EPA retaining oversight and permitting authority for wells on Indian Lands, except for Class II wells on Navajo Nation lands, because the Nation already holds primacy.
The move got the support from Arizona’s congressional delegation, emphasizing the significance of federalism and local priorities.
“Our Founding Fathers were clear in their commitment to states’ rights and a small federal government. Individual states must have the power to govern in the best interests of their own people. This ruling affirms that Arizona—not Washington bureaucrats—is best equipped to protect our water, foster economic growth, and ensure the well-being of our citizens. It is a key step in ensuring access to safe drinking water for Arizona communities for years to come. No one understands Arizona’s communities and resources better than Arizonans ourselves,” said Congressman Andy Biggs (AZ-05). “I am grateful to President Trump and EPA Administrator Zeldin for their commitment to slashing needless regulations and restoring authority to the states. This is a victory for federalism, for common sense, and for the people of Arizona.”
“Arizona understands our land, our water, and our energy needs better than anyone in Washington ever could. Granting primacy to our state of the Underground Injection Control program is a recognition that local expertise and innovation should lead the way,” said Congressman Juan Ciscomani (AZ-06). “It means that Arizona will now oversee the permitting for all underground injection wells, including Class VI wells essential for carbon capture and storage—a critical part of a secure and cleaner energy future, and Class I wells, which store hazardous waste far below drinking water resources critical for the health of all Arizonans. This step is a win for clean water, a win for responsible energy development, and a win for our economy.”
“I want to thank Administrator Zeldin and the Trump administration for recognizing that Arizona is best positioned to protect its underground sources of drinking water. This rule will allow us to provide clean and safe water for every Arizonan while bringing more and exciting economic opportunities to our great state,” said Congressman Abe Hamadeh (AZ-08). “This rule will strengthen Arizona’s ability to manage our future for our families.”
Arizona Governor Katie Hobbs also praised the decision as a pivotal achievement for the state saying, “Today’s decision is a major milestone for Arizona. By granting our state primacy over underground injection wells, the EPA is once again recognizing that Arizona is best positioned to protect its water and natural resources. This authority allows us to safeguard the integrity of our groundwater, while also supporting responsible economic growth and clean energy development. With this step, Arizona gains the tools to lead on sustainable environmental management and innovation for years to come.”
Ethan Faverino is a reporter for AZ Free News. You can send him news tips using this link.
