The Environmental Protection Agency (EPA) says it is near approving an application from Colorado to administer permitting for Class VI “underground injection control” (UIC) wells under the Safe Drinking Water Act (SDWA). However, as the application is not finalized, the EPA is accepting comments on its proposed decision through May 4, 2026, and has scheduled an online public hearing for April 23, 2026 on the agency’s planned determination.
UIC wells are bored, drilled, or driven shafts used to place fluids—such as water, wastewater, brine, or chemicals—into porous geologic formations for storage or disposal, EPA says. In order to protect drinking water, EPA regulates the wells, which are essential for geothermal energy mining, industrial waste disposal, oil and gas production, brine disposal and enhanced recovery, and carbon sequestration.
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