(Portland, OR) -- The best way to treat the parasite cryptosporidium in Portland's water is still up in the air. The Portland Tribune reports the Portland Utility Board met at City Hall yesterday to discuss a recommendation to Portland City council and how to treat the problem, but was unable to come to an agreement. A few options are in the running, one includes killing the parasite with an ultraviolet light and costs 105-million dollars. Another would be to build a filtration plant that would cost between 350 and 500-million. The board will meet again next Tuesday.