Water from the sea around Japan's crippled Fukushima nuclear plant shows levels of Cesium-134 and Cesium-137 well above regulatory limits, Tokyo Electric Power Co. said Thursday.

Cesium-137 readings near the plant's Reactor 2 were 830 becquerels per liter, compared with the regulatory limit of 90 per liter.

Both Cesium-134 and Cesium-137 are harmful to humans.

The latest water samples contain "high density of tritium and strontium," a TEPCO spokesman told Efe, adding that he had no new information on the condition of six Fukushima workers who were doused with radioactive water as a result of human error.

Wednesday's mishap, which saw nearly 10 tons of radioactive water spilled, was the fourth attributed to human error in less than a week at Fukushima, devastated in March 2011 by a massive earthquake and ensuing tsunami. EFE