NEW : Experts say the release will not likely cause lasting environmental harm . Water from a treatment facility and around four reactors is being dumped . Complicating the situation is the fact that , in some cases , authorities do n't even know how much radiation is getting out . The water has been treated to remove radioactive iodine, which can be harmful if ingested by humans or animals. Basement water threatens the `` stability '' of the cooling systems of Nos . 5 and 6 units .
NEW : Experts say the release will not likely cause lasting environmental harm . Water from a treatment facility and around four reactors is being dumped . The water has been treated to remove radioactive iodine, which can be harmful if ingested by humans or animals. Basement water threatens the `` stability '' of the cooling systems of Nos . 5 and 6 units .