Arizona would be the fifth state to gain “primacy” over the permitting of wells used to inject carbon dioxide underground.

Arizona carbon injection wells oversight transferred to state control, officials celebrate while environmental groups fear ...

Arizona will regulate thousands of wells across the state used to inject water, chemicals, and possibly even carbon, into the earth.

For years, the EPA has enforced federal standards and overseen a type of well used across Arizona to inject certain materials deep underground. But now, the federal government has announced that it ...

At that event, EPA granted the state’s request for authority over carbon dioxide injection wells, which are regulated under the Safe Drinking Water Act. Arizona has also applied for that same ...

was in the spotlight Monday after securing permits from the U.S. Environmental Protection Agency (EPA) to store carbon dioxide in underground wells 14 miles from the city of Odessa in Ector county.