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Geologic Sequestration in Region 5

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Region 5 UIC

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Geologic sequestration activity in Region 5

EPA Region 5 began directly implementing the UIC Class VI regulations for all states in Region 5 on September 7, 2011. The Region’s Underground Injection Control Branch will implement the Class VI regulations in these states until a state submits an application for Class VI primary enforcement responsibility within its borders and EPA approves the application.

Class VI permit applications

Map of Class VI Injection Sites in Region 5

View a larger map of Class VI Injection Sites in Region 5

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What is Geologic Sequestration?

Geologic sequestration of carbon dioxide

Geologic sequestration of greenhouse gases is the underground injection of carbon dioxide (CO2) through wells into deep porous rock formations.

Geologic sequestration, (also called geosequestration), is part of a larger group of technologies being considered to reduce the amount of greenhouse gases that we emit to the atmosphere.

Carbon Capture and Sequestration (CCS), (sometimes called Carbon Capture and Storage):

This type of injection involves new factors that need to be considered to ensure that it is done with as little risk to human health and the environment as possible.

This is why EPA has issued regulations for a new class of underground injection well (Class VI) that is designed for geologic sequestration of carbon dioxide.

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