The City of Ottawa measures water quality for many of its streams and rivers. Information about the monitoring program is available at: http://ottawa.ca/en/residents/water-and-environment/air-land-and-water/water-quality-ottawas-rivers-and-streams#wq21
The data have been posted on the City’s web site at: http://data.ottawa.ca/en/dataset/water-quality
Anyone can download and analyze this data. The City measures 20 values about once a month (although there are gaps, usually in winter), with data available from 1998 through 2014 for some locations and parameters. 2015 data had not yet been posted as of February 2016 when we generated the graphs.
Measured parameters are:
E Coli – Total
Total Suspended Solids
Total Kjeldahl Nitrogen
Total Nitrite Nitrate