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Saint Louis River Estuary/AOC

WLSSD Historical & Ongoing Monitoring Data


The Western Lakes Superior Sanitary District (WLSSD) has been monitoring sites in the St. Louis River for a number of years. This plotting tool presents 2 datasets:

  1. Historical: bacterial, physical & chemical data, collected from 18 sites on the river, from 1973 to 1996.
  2. Ongoing: bacterial & physical data, collected from 12 sites, from 2004 to 2010.

Launch the WLSSD SLR Estuary data plotter

WLSSD SLRE data plotter


The data are provisional and subject to change.

Interactive map of the sampling sites

Note: All sites are in the St Louis River, except:

* - SL 259 (Site 8) is at the Thomson Rd crossing of the Forbay Lake hydro channel

* - SL 241N is at the east end of Forbay Lake

** - Site 13 is the Midway River, 4.22 miles upstream from Thomson Reservoir