Pondera County, environmental groups petition EPA over refinery wastewater

By: Jordan Hansen

Outlets: Daily Montanan

Published: June 16, 2026

Words: 1,380

Last Updated: 1 month, 1 week ago

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Pondera County and several advocacy groups have filed a petition against the Environmental Protection Agency in federal court to stop an energy company from dumping wastewater into a nearby aquifer.

Montana Renewables, a Great Falls biofuels company, has an agreement with the owner of the wells to dispose of wastewater into two old oil wells near Valier, which feeds into the Madison aquifer. The aquifer underlies eight states and provinces in the United States …

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