
Wastewater from oil and gas operations could affect drinking water
Access to clean drinking water is a basic human right.
Environmental groups joined Pondera County officials to challenge an underground wastewater-disposal permit that benefits the Montana Renewables biorefinery in Great Falls, potentially affecting the drinking water. The petition focuses on two unproductive oil wells near Lake Frances.
They also called for information on what exactly is in Montana Renewables’ wastewater.
Injection sites, at more than 3,400 feet below ground in the Madison Aquifer, have been used to dispose of wastewater from oil and gas operations. The EPA said this part of the aquifer is not a valuable source of drinking water.
Pondera County officials are asking for more information from Montana Renewables on what they are doing related to safe drinking water wells. The group claims their wastewater is nonhazardous. However, the wastewater contains phosphorus, nitrogen, salts, and other impurities.
More here: https://montanafreepress.org/2026/06/16/groups-challenge-epa-decision-on-montana-renewables-wastewater-site/.