From Wikipedia:  "Andrew Jackson Young, Jr. (born March 12, 1932) is an American politician, diplomat, activist, and pastor from Georgia. He has served as a Congressman from Georgia's 5th congressional district, the United States Ambassador to the United Nations, and Mayor of Atlanta. He served as President of the National Council of Churches USA, was a member of the Southern Christian Leadership Conference (SCLC) during the Civil Rights Movement, and was a supporter and friend of Martin Luther King Jr."

Aside from his advanced age (84), Andrew is politician, diplomat, activist and pastor.  I see nothing there that gives him any special scientific qualiications with regard to water quality.  There are vanishingly few politicians or pastors that I would trust to tell me that the sun had risen today.  In both cases, they are folk who couldn't get honest work or were just too dirt lazy to do it.