Of course the article does not mention the lever of danger posed by 1 bq per cubic meter of seawater. Its actually pretty insignificant, health-wise.
Seems to me like it is just more scare-mongering to gain more control over the people.
http://en.wikipedia.org/wiki/BecquerelOne Bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
http://en.wikipedia.org/wiki/Caesium-137Caesium-137 reacts with water producing a water-soluble compound (caesium hydroxide), and the biological behavior of caesium is similar to that of potassium and rubidium. After entering the body, caesium gets more or less uniformly distributed throughout the body, with higher concentration in muscle tissues and lower in bones. The biological half-life of caesium is rather short at about 70 days. Experiments with dogs showed that a single dose of 3800 μCi/kg (140 MBq/kg, or approximately 44 μg/kg) is lethal within three weeks.
Accidental ingestion of caesium-137 can be treated with Prussian blue, which binds to it chemically and reduces the biological half-life to 30 days.