Environmental Groups Sue EPA Over Approval of Toxic Semiconductor Chemicals

CHIPS Communities United and the Sierra Club have filed a lawsuit against the U.S. Environmental Protection Agency (EPA) in the U.S. Court of Appeals for the Ninth Circuit. The legal challenge alleges that the agency approved two new chemicals for semiconductor manufacturing despite knowing they pose severe health risks.

Represented by Earthjustice, the plaintiffs argue that the EPA approved the substances while identifying potential risks of cancer, neurological harm, and sudden death. According to the lawsuit, the EPA admitted it lacked the necessary information to fully calculate the extent of these health risks before granting approval. The specific names of the chemicals remain redacted in the EPA documents attached to the case, though they are suspected to be persistent, bioaccumulative toxins capable of contaminating cord blood and breast milk.

The AI Infrastructure Push

The semiconductor industry is a primary source of per- and polyfluoroalkyl substances, commonly known as "forever chemicals." The current surge in chip manufacturing is largely driven by the rapid expansion of AI data centers, which require massive quantities of specialized hardware. This industrial boom has placed significant pressure on the EPA to accelerate the approval of new manufacturing chemicals under the Toxic Substances Control Act (TSCA).

Critics argue that this speed comes at the expense of public safety. "The Trump administration is rushing dangerous chemicals to market without the review or the protection that the law requires," said Jonathan Kalmuss-Katz, a senior attorney with Earthjustice. Jane Williams, chair of the Grassroots Network National Clean Air Team at Sierra Club, added that the rush to build data centers is causing harm that extends far beyond the facilities themselves.

Industry and Legal Implications

This case underscores a growing tension between the U.S. strategic push for AI infrastructure and environmental safety mandates. If the court determines that the EPA bypassed legal risk assessment processes to prioritize industry speed, the ruling could set a major precedent. Such a decision would fundamentally change how new industrial chemicals are vetted during high-priority national technology expansions, potentially slowing the rollout of new materials used in the tech supply chain.

What's Next

The Ninth Circuit will now determine if the EPA's approval process met the legal requirements of the TSCA. The outcome will likely hinge on whether the agency's admission of insufficient data constitutes a failure to perform its statutory duty to protect public health. For now, the identity of the chemicals remains shielded by redactions, leaving the full scope of the environmental impact unconfirmed.