One impediment to the use of treated sludge as agricultural fertilizer is

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    possible disease outbreaks in livestock grazing on treated lands.
     in some instances the sludge may contain high levels of toxic metals.
     rivers could become oligotrophic if sludge is not discharged into the water.
     the potential for groundwater contamination with pathogens.
asked Jun 25, 2012 in Environmental Science by anonymous
    

1 Answer

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in some instances the sludge may contain high levels of toxic metals.
answered Jun 26, 2012 by Geodude ~Top Expert~ (9,680 points)



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