(Portland, OR) -- Water tests in older Portland homes shows higher than acceptable levels of lead. Twice a year, the water from 100 homes that have plumbing with lead solder are tested and the results show 21 parts per billion. The EPA limit is 15 parts per billion. Homeowners with plumbing that uses lead solder should run water to flush out the lead and consider using a filter. Next year, the Portland Water Bureau will bring a Corrosion Control facility online that will reduce the ability of the water to leach lead from the solder.