The Conshohocken Borough Sewage Treatment Plant serves only a very small area of the southwest corner of the township.
The Ambler Municipal Sewage Treatment Plan serves the northern area of
the township and the area of the township bordered by Skippack Pike and
Bethlehem Pike, known as the Arlingham Section, is served by the City of
Philadelphia Southwest WPCC.
For information on
Whitemarsh Township Authority sewer rentals, see their website.