Fortunately I found this...
"We have no evidence at this time that there are impacts to public drinking water in the vicinity of the plant. We will continue to monitor and assess the situation. The EPA safe drinking water concentration for tritium is 20,000 picocuries/liter. It is not expected or likely that this concentration would be exceeded as a result of this event. "Private well testing in the vicinity of the plant for tritium is not necessary at this time. We will continue to assess the situation to determine the need as we monitor the situation.
MN State Health: Xcel Energy Monticello Power Plant Tritium Leak
And this...
