A July 16 EPA memo exempts off-grid power plants from acid rain rules, potentially lowering costs for data centers and crypto miners like Riot Platforms.
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A July 16 memo from the EPA exempts off-grid power plants from the Acid Rain Program, a regulatory shift that could lower costs for data centers and, by extension, crypto miners.
The memo, signed by EPA Assistant Administrator Aaron Szabo, clarifies that the Acid Rain Program under the Clean Air Act applies only to generators that sell electricity “primarily for use by the public.” Facilities that serve a single private consumer and never connect to the grid fall outside the program’s scope. The EPA calls these “islanded” power generation facilities.
The Acid Rain Program caps emissions of sulfur dioxide and nitrogen oxides from large grid-connected units. Removing that layer of compliance compresses project timelines and capital costs for dedicated power infrastructure. The memo was prompted by inquiries from companies and state regulators about a proposed 500 MW natural gas plant designed solely to power a data center.
That logic applies equally to any islanded facility powering a private operation. Bitcoin mining operations, which consume enormous amounts of electricity, have increasingly sought dedicated power sources. Marathon Digital, Riot Platforms, and other publicly traded miners have spent years negotiating power agreements and, in some cases, building or co-locating with generation assets.
Riot Platforms carries an Alpha Score of 62, labeled Moderate. The stock sits in the Financials sector. A faster, cheaper path to dedicated power could improve margins for miners that build or contract their own generation.
Directly, companies that build data center infrastructure benefit from lower permitting burdens. The risk side is real. State regulators could impose their own emissions caps that replicate the federal rules. Environmental litigation is virtually guaranteed, and a memo clarifying statutory definitions is a weaker legal foundation than a formal rulemaking with public comment periods.
The EPA under Administrator Lee Zeldin has been pushing to streamline air permitting for data centers. In December 2025, the agency launched a Clean Air Act resource hub for data centers. In May 2026, it proposed allowing partial construction before full permitting is complete. The ARP clarification is the latest step in that sequence.
No national standard for data center operations has been enacted. Oversight has shifted to state authorities, creating a patchwork of rules that varies by location. The memo’s effect on crypto miners will depend on how state-level regulators and the courts respond.
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