St. Louis River Alliance

Stream Monitoring

At all streams/rivers we sampled for the following:

  • Dissolved Oxygen – the amount of diatomic oxygen, or gaseous oxygen (O2), dissolved in the water.
  • Specific Conductance – the water’s ability to conduct electricity. This measures the water’s ionic activity and content.
  • Turbidity – measures the cloudiness of the water caused by suspended solids.
  • pH – this measures the acidity or basicity or the water.
  • Temperature – a fairly obvious measurement, but also very important to a stream or river’s well being.
  • Transparency – measured by using a transparency tube.  The greater the transparency reading in centimeters, the clearer the water.

Water samples were taken to a certified laboratory and tested for the following parameters:

  • E. Coli Bacteria
  • Total Phosphorus
  • Ortho-Phosphorus
  • Ammonia Nitrogen
  • Total Kjeldahl Nitrogen
  • Nitrate + Nitrite Nitrogen
  • Total Suspended Solids
  • Chloride

If you are interested in learning more about these parameters, please visit

Zach Moore at Beaver River, 2010

The SLRA compiled field data and lab results and sent all information to the Minnesota Pollution Control Agency for processing. This data is then housed on the Environmental Data Access (EDA) System for Surface Water. To search for stream information by name, click here.

What sites were we testing?

Ten North Shore Sites

n.shore sites map

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