Upgrading Sacramento’s wastewater treatment could cost $2 billion

In December 2010, the Central Valley Regional Water Quality Control Board told the plant to clean up its effluent as a condition of renewing its state discharge permit. The board found that high volumes of ammonia in the water were disrupting the food chain and endangering fish such as salmon and Delta smelt. Single-celled organisms posed health risks to people who came in contact with the river water, board members concluded. Read more here  09:12

Read more here: http://www.sacbee.com/2014/05/25/6430489/upgrading-sacramentos-wastewater.html#storylink=cpy