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UIC Program Primacy

State UIC Programs have primary enforcement responsibility (or primacy) once their UIC programs have been approved by EPA. This page provides information about the requirements for obtaining primacy and which states have been granted this authority.


What is primacy?

The UIC Program requirements were developed by EPA and designed to be adopted by states, territories, and tribes. States, territories, and tribes can submit an application to EPA to obtain primary enforcement responsibility, or primacy. Agencies that have been granted this authority oversee the injection activities in their states. The requirements for primacy programs are outlined in the UIC regulations at 40 CFR Part 145.

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Is there more than one way for a state to apply for primacy?

Yes. States can apply for primacy in the following ways:

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Who currently has primacy?

EPA has delegated primacy for all well classes to 33 states and 3 territories; it shares responsibility with 7 states and 2 Indian tribes ( i.e. EPA has authority over some classes and the state has authority for others).

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What if a state, territory, or tribe does not get primacy?

If a state does not obtain primacy for all or some of the well classes, EPA implements the program directly through one of its Regional offices. Currently, EPA implements the program for all well classes in 10 states.

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