Pittsburgh Stormwater Design Manual

The City of Pittsburgh Stormwater Design Manual (manual) offers technical guidance for compliance with the stormwater management requirements set forth in Title 13, and, to a lesser extent, Titles 4 and 9 of the city’s code. This includes the planning, design, and construction of stormwater management infrastructure specifically tailored to conditions often encountered in the city. The contents of the manual are primarily intended to be used by stormwater design professionals, such as engineers, landscape architects, and planners, for projects that trigger the requirements for a stormwater management site plan (SWM site plan) review.

This manual includes requirements that all construction does not increase post-development total runoff volume for all storms equal to or less than the two-year, twenty-four-hour duration rainfall event, and that runoff from at least the annual 95th percentile rainfall event is managed on-site (not released into sewer system or surface waters).