(Portland, OR) -- The City of Portland has installed new equipment that should reduce lead in drinking water. Officials say the system will make the city's water less corrosive. The Portland Water Bureau doesn't have lead pipes in the distribution system, but lead exists in plumbing systems of older homes. Corrosive water causes lead in home plumbing to increase which is a risk to children. The treatment system adds sodium carbonate and carbon dioxide to increase pH and alkalinity of the water.