Check-out Frederick Kaufman's (meandering but sound) 'Wasteland' (Harpers Magazine, 2008), and Radiolab's (naive, rose-coloured) 'Pooptrain' (WNYC, 2013), to kick-off an investigation of the larger sewage/bio-solids-for-breakfast epidemiological back-story  1990 to present. 

 ::::::::::: And here's a smorgasbord appetizer of related sludge fertilizer material: 

 ::::::::::: 'Sewage Sludge' at Sourcewatch.org 
 ::::::::::: 'Hazardous Waste in Fertilizer' by Diane Olson Rutter (2003) 
 ::::::::::: 3 part Sludge Series, C. Vahnyk, Toronto Star, 2008. 
 ::::::::::: "Holding the Bag: Toxic Waste in Fertilizer", 'Washington Toxics Coalition Report', 2001. 
 ::::::::::: "Citizens for Sludge Free Land" non-profit (anti-bio-solidsfertilizer advocacy site)      

 :::::::::::