When chernobyl happened, it left marks on finlands nature. Upper finland you still get some elevated radiation levels from mushrooms etc. Not much but clearly elevated compared to otherwhere on the country.

So, when you fly up in 12 kilometers you get a dose of 5 µSv/h. When chernobyl happened, on average dose on ground level here in finland was the same.

0,4 µSv/h - and you get an alert from automated radiation monitoring network set up in country.

30 µSv/h for that, who has received radiation therapy. He gets home after the count, from one meter away, is below this.

100 µSv/h is when you need to get inside.


New Hampshire shore, Dover/Portsmouth area has 50316cpm. That is 132 µSv/h.