The Trump administration’s push to gut five critical EPA regulations could unleash a surge of toxic pollution from Indiana’s 12 coal plants, according to a new Sierra Club tool launched on May 6, 2025. The Trump Coal Pollution Dashboard shines a light on the dire consequences for the state’s environment and public health, as coal-heavy utilities like Duke Energy lobby to dodge emissions controls.

A Looming Pollution Crisis

Indiana, a coal powerhouse, faces the loss of rules targeting major pollutants:

Good Neighbor Plan: Curbs nitrogen oxides fueling cross-state smog.
Regional Haze Rule: Cuts emissions to clear skies over national parks.
Mercury and Air Toxics Standards: Reduces mercury and other toxic air pollutants.
Effluent Limitation Guidelines: Limits toxic wastewater from coal plants.
Greenhouse Gas Standards: Caps CO2 emissions from fossil fuel facilities.

These safeguards, if enforced, would cut Indiana’s coal plant emissions by 14.36 million tons of carbon dioxide (55%), 4,045 tons of nitrogen oxides (75%), 11,276 tons of sulfur dioxide (47%), and 14,050 pounds of wastewater pollutants (51%) annually. Trump’s EPA, since March 2025, has moved to dismantle these rules, threatening massive pollution spikes.

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Coal Plants Under Scrutiny

The Sierra Club’s dashboard names 12 Indiana plants, owned by utilities like Duke Energy, AES, NIPSCO, Indiana Michigan Power, Alcoa, and the Indiana Municipal Power Agency. Standouts include:

Rockport (Indiana Michigan Power): Set to skirt Regional Haze and wastewater rules.
Petersburg (AES): Faces looser smog and haze controls.
Gibson (Duke Energy): At risk of higher CO2 and haze emissions.
Merom (Hallador): Could avoid CO2 and visibility standards.
Whitewater Valley (Indiana Municipal Power): Threatened by weakened smog, CO2, and wastewater rules.

Duke Energy, with three plants, has pushed hardest for rollbacks, signaling more coal use post-inauguration and requesting EPA exemptions. It scored the lowest among Indiana utilities on the Sierra Club’s Clean Energy Transition Scorecard.

Health and Environmental Toll

Undoing these rules could flood Indiana with toxins like mercury, linked to neurological damage, and arsenic, a carcinogen. The state’s 100 coal ash sites—more than any other state—already leach contaminants into groundwater at 91% of plants, endangering drinking water.

“These rollbacks hit Hoosiers’ lungs and rivers hardest,” said Robyn Skuya-Boss, Sierra Club Hoosier Chapter Director. Laurie Williams, Beyond Coal Campaign Director, warned, “Trump’s policies are poisoning our communities.”

Utilities Face Backlash

Indiana’s coal reliance is under fire as nearby states like Ohio embrace renewables. Utilities like Duke and AES risk investor and public backlash for clinging to coal. With coal ash tainting water sources, the push for cleaner energy grows louder.

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Why It Matters?

Indiana’s coal plants are at a crossroads. EPA rollbacks could lock in decades of toxic emissions, harming health and stalling the state’s clean energy shift. A 2024 PwC survey shows 83% of consumers want sustainable solutions, pressuring utilities to act. The Sierra Club’s tool exposes the stakes, urging action to protect Indiana’s future.

Looking Forward

With federal protections fading, Indiana’s leaders and utilities must prioritize renewables and state-level safeguards. The fight for clean air and water is heating up, and the Sierra Club’s dashboard is a rallying cry for communities to demand accountability from polluters.

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