State University of New York Institute of Technology
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Pretreatment

Publicly owned treatment works (POTW's) collect wastewater from homes, and commercial buildings then sends transports it to a treatment plant through a collection system (series of pipes).  Here harmful organisms and contaminants are removed so it can be released to a recieving stream.  The POTW's are regulated by Federal, State and local government. 

http://cfpub.epa.gov/npdes/home.cfm?program_id=3


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