High Quality Content by WIKIPEDIA articles! Marc Edwards (born 1964) is a civil engineering/environmental engineer and the Charles P. Lunsford Professor of Civil and Environmental Engineering at Virginia Tech. An expert on water treatment and corrosion, Edwards`s research on elevated lead levels in Washington, DC`s municipal water supply gained national attention, changed the city`s recommendations on water use in homes with lead service pipes, and caused the Centers for Disease Control and Prevention to admit to publishing a report so rife with errors that a congressional investigation called it "scientifically indefensible". He is considered one of the world`s leading experts in water corrosion in home plumbing, and a nationally recognized expert on copper corrosion.