CO2 Management > CCUS > US EPA grants Arizona Class VI primacy, expands state role in CCS

US EPA grants Arizona Class VI primacy, expands state role in CCS

Published 19:58 on September 10, 2025 / Last updated at 19:58 on September 10, 2025 / / Americas (US & Canada), CO2 Management (CCUS)

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The US EPA has finalised approval of Arizona’s request for Class VI primacy for underground injection wells under the Safe Drinking Water Act (SDWA).
The US EPA has finalised approval of Arizona’s request for Class VI primacy for underground injection wells under the Safe Drinking Water Act (SDWA).


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