Ontario Stream Assessment Protocol Manual (Version 10)
The Ontario Stream Assessment Protocol (OSAP) contains a series of standardized methodologies for identifying sites, evaluating benthic macroinvertebrates, fish communities, physical habitat and water temperatures in wadeable streams. The OSAP provides standardized methods that ensure data repeatability. Use of these standard methodologies allow data to be shared, used for multiple purposes and stored in a common database. Download a PDF copy of the OSAP Manual Version 10, updated April 2017, from Toronto and Region Conservation.