https://apnews.com/article/xcel-energy-nuclear-leak-tritium-6e522afbb12ad26925c40d833853088d

Minnesota regulators knew four months ago that radioactive waste had leaked from a nuclear power plant in Monticello — but they didn’t announce anything about the leak until this week.

The delay in notifying the public about the November leak raised questions about public safety and transparency, but industry experts said Friday there was never a public health threat. They said Xcel Energy voluntarily notified state agencies and reported the leak of tritium to the Nuclear Regulatory Commission soon after it was confirmed and that the leak of 400,000 gallons (1.5 million liters) of radioactive water never reached a threshold that would have required public notification.