Judge rules radioactive water can be released into the Hudson River

By Frank Brill, EnviroPolitics Editor
A federal judge (U.S. District Judge Kenneth Karas) ruled on Wednesday, September 24, that New York’s “Save the Hudson” law is invalid. The state law, enacted in 2023, banned the discharge of radioactive wastewater (including water containing tritium) into the Hudson River.
The court found that the state law interferes with federal authority over nuclear matters, specifically radiological safety and waste disposal, which is regulated by the Nuclear Regulatory Commission (NRC).
Holtec International, the company overseeing the decommissioning of the Indian Point nuclear plant, had challenged the New York law. The ruling allows Holtec to discharge treated radioactive wastewater, provided it remains within federal standards/regulations.
Local officials and environmental groups strongly oppose the plan. They warn that the ruling undermines decades of effort to rehabilitate the Hudson, and risks harm to ecosystems, drinking water, and public trust.
Some data points:
• Holtec claims the discharges will comply with federal safety limits.
• Opponents point out that tritium is a radioactive form of hydrogen that can be challenging because it behaves chemically like water, making removal difficult.
• The judge’s ruling underscores that federal law preempts state law when the state law “categorically precludes” a federally accepted disposal method.
Key legal & technical issues
| Issue | Description / Tension |
|---|---|
| Federal preemption | The core of the court’s decision is that the state law is preempted by federal law — states can’t override or block federally licensed/disposed nuclear operations. |
| Regulatory authority & safety standards | The NRC has exclusive authority in many areas related to nuclear safety, including radiological releases during decommissioning. The question is whether the proposed discharge truly stays within those limits. |
| Nature of tritium / radioactive water | Tritium (a radioactive isotope of hydrogen) is difficult or impossible to remove from water in many cases, since its chemistry is nearly identical to ordinary water. That means many strategies focus on dilution and monitoring rather than filtration. |
| Appeal and delays | It’s likely the state or environmental groups will appeal. Meanwhile, Holtec’s decommissioning timeline, budget, and engineering plans may be affected by continued litigation or regulatory scrutiny. |
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