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"Reducing the Risk of Inflow and Infiltration (I/I) in New Sewer Construction"
Robinson, Sandink and Lapp for SCC, 2019

Norton, ICLR, and Engineers Canada worked with an expert stakeholder committee from across Canada to develop a National Standard of Canada. This document is largely based on Norton's self-published manuals of best practice (see "Publications"). 

BNQ (a Standards Development Organization), working with a Steering Committee from across Canada,  has developed this foundational document  into a National Standard of Canada, to be published in 2023.

The first national standard on I/I, developed for municipalities

New sewers in Ontario are leaking unacceptably (Norton, 2015)

In 2015, Norton initiated a project to address the issue of I/I in new subdivisions. We started by collecting flow monitoring data from new subdivisions across Ontario, Results were alarming. See results at left, of 35 subdivisions reporting from across Ontario See Norton Publication, "Project to Address I/I in New Subdivisions, 2017).


Norton's Recommendations are being
widely adopted.

As of 2023, many municipalities have adopted Norton's primary recommendation: install a flow monitor at the downstream end of all subdivisions, and do not accept the sewers until they are leak-acceptable per existing specifications.

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