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State UIC ProgramsEPA can authorize states to implement the UIC program. States have the
option of applying for primary responsibility, or primacy, for the UIC
program for all classes of wells; only oil and gas related wells (class
II wells); or all wells except oil and gas related wells (classes I, III,
IV and V). If a state does not obtain primacy for all or some of the
well classes, then EPA implements the program directly through one of
its Regional offices. Native American tribes also follow the same rules
for obtaining primacy if they are considered a "Federally Recognized Tribe"
and have been designated as "Treatment Similar to a State". To date the
UIC program in all Native American lands is implemented by EPA. EPA has
delegated primacy for all well classes to 34 states, it shares responsibility
in 6 states and implements a program for all well classes in 10 states.
The Agency has also delegated primary enforcement responsibility to 3
territories. EPA provides grant funds to all delegated programs to help
pay for program costs. States must provide a 25% match on EPA funds.
The graphic below shows the breakdown of responsibility for the UIC program
in the states. A list of the primacy status of states is also
available.
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