For documentation of WWTP ...

Published October 27, 2015 12:59 by John R. Ackerman, P.E., P.G., BCEE, F.NSPE, President / Chief Engineer at Twin Oaks Water Systems, Inc.

For documentation of WWTP performance in the United States check out the US Environmental Protection (USEPA) website, http://www.epa.gov/, for information. Similar information should be available for other countries.