The polygons delineate the boundaries of each of the major sub-watersheds within City of Calgary boundaries. These include Bow River Direct, Elbow River, Fish Creek, Nose Creek, Pine Creek and Shepard Wetland/Western Headworks Canal. The sub-watersheds delineate the major drainage areas within The City. Polygons should be layered over an orthophoto of Calgary, with the rivers, creeks and streams visible. This data is updated on an as needed basis by Watershed Strategy and has been simplified for viewing purposes.

This dataset contains results for the City of Calgary's Watershed Monitoring Program. The program monitors surface water quality across a network of sites that include rivers, tributaries, and reservoirs within the Calgary region. Sampling locations have been added, removed, or modified over time. Grab sampling methodologies are used for sample collection.

The City of Calgary uses approved and documented analytical testing methodologies, and the City of Calgary laboratory is accredited to the ISO/IEC 17025 standard. Quality Assurance programs track and ensure consistent laboratory performance. Changes in data over time, such as method detection limits, accredited testing parameters, and formatting are the result of newer analytical techniques and improved data quality standards.

Sampling locations for the City of Calgary's Watershed Monitoring Program