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Data Collection

Reliable, high quality stream data is critical to understanding the overall health of a watershed. In particular, how development and other landscape-altering activities can negatively impact stream health and natural stream functions.

Routine monitoring of Salt Lake County streams allows the Watershed Program to assess where watershed conditions appear to be changing, identify areas of concern, and guide stream restoration efforts.

macroinvertebrate sampling with kicknet water chemistry data collected with multimeter

Water Quality Monitoring

An expanded water quality data collection program was undertaken in 2009, and has been refined over time to reflect specific interests in the watershed.

Data collected include:

  • Water chemistry, flow, and bacteria sampling.
  • Aquatic macroinvertebrate samples (a.k.a. bugs) help identify long term water quality trends.
  • Stream channel stability analysis.
  • *New in 2019* Stream sediment sampling.

Visit our GIS OpenData Portal to access our data, including:  stream sampling site locations, sample data collected, and SLCo waterways. This data is shared with regulatory agencies at the federal, state, and local levels.  

Download Water Quality Monitoring Data

Annual Report

Salt Lake County Watershed published the first annual 2016 Water Quality Report. This report provides a fine scale analysis of the health of County waterways. Site-specific data tracks the functionality of sub-basins and, over time, track how these ecosystems respond to management practices and restoration efforts.  

Streamflow & Precipitation

The Watershed Program maintains a network of streamflow and precipitation gauges located throughout county. Daily flow data collected from many stream sites is needed to forecast floods, manage water quality, and assess water availability. In addition, stream gauge data is key to understanding the relationship between precipitation and how quickly streamflows peak.

See Real-time Streamflows & 24-hour Precipitation


Watershed Program Interactive Map