A Thorough Monitoring of the State of the St. Lawrence River

For each indicator, the monitoring sheets summarize the knowledge arising from the State of the St. Lawrence Monitoring Program. These apply to water, biological resources, shoreline, sediment and uses.
Previous editions of monitoring sheets are available in the catalog of publications.

Table of the latest monitoring sheets

Element

Symbol

Sheet

Water

Salubrité des eaux coquillières

Marine Water Quality Monitoring in Shellfish Areas, 2015 (PDF / HTML)

Indicateur de la contamination de l’eau par les toxiques

Water quality of the fluvial sector (transport of contaminants), 3rd Ed., 2015 (PDF / HTML)

Pictogramme de l’indicateur débit et niveau d’eau

Changes in water levels and flows in the St. Lawrence River, 2nd Ed., 2015 (PDF / HTML)

Water quality of the Richelieu and Yamaska rivers, 3rd Ed., 2015  (PDF / HMTL)

Paramètres physicochimiques et bactériologiques

Water Quality in the Fluvial section - Physicochemical and Bacteriological Parameters, 4th Ed., 2015 (PDF / HTML)

Processus océanographiques

Oceanographic Processes in the Estuary and Gulf, 3rd Ed., 2014

Safety of Potential Freshwater Swimming Sites, 2nd Ed., 2006



Biological resources


















Contamination des poissons par les toxiques

Toxic Contamination of fresh Water fish, 3rd Ed., 2016 (PDF / HTML)

Contamination du grand héron par les toxiques

Great Blue Heron - A Sentinel Species for the River, 3rd Ed., 2015 (PDF / HTML)

Béluga

St. Lawrence Estuary Beluga Whale, 3rd Ed., 2015 (PDF / HTML)

Milieux humides

Freshwater Wetlands, 3rd Ed., 2014 (PDF / HTML)

Oiseaux marins

Seabirds - Sentinel Species for the Gulf, 3rd Ed., 2014 (PDF / HTML)

Fou de Bassan

Northern Gannet - A Sentinel Species for the Gulf, 3rd Ed., 2014 (PDF / HTML)

Processus océanographiques

Oceanographic Processes in the Estuary and Gulf, 3rd Ed., 2014

Communautés benthiques

Benthic Macroinvertebrate Communities, 2nd Ed., 2013

Communautés de poissons

St. Lawrence Freshwater Fish Communities, 2nd Ed., 2008

Espèces envahissantes

Invasive Plant Species of the St. Lawrence Wetlands, 2008

Bar rayé

Reintroduction of the Striped Bass into the St. Lawrence, 2nd Ed., 2008

Shoreline

Land Cover along the Great Lakes and the St. Lawrence River, 2010

Sediments

Contamination des sédiments par les toxiques

Butyltins in Sediments of the St. Lawrence River, 2014 ( PDF / HTML )

Contamination des sédiments par les toxiques

Polybrominated diphenyl ethers in the suspended matter and sediments of the St. Lawrence River, 2013

Contamination des sédiments par les toxiques

Toxic Contamination in Sediments – Lake Saint-Louis: Where Two Rivers Meet, 2008

Contamination des sédiments par les toxiques

Toxic Contamination in Sediments – Lake Saint-Pierre: Last Stop before the Estuary, 2005

Contamination des sédiments par les toxiques

Toxic Contamination in Sediments – Lake Saint-François: A Century-Old Story, 2002


Uses




Contamination des poissons par les toxiques

Toxic Contamination of fresh Water fish, 3rd Ed., 2016 (PDF / HTML)

Salubrité des eaux coquillières

Marine Water Quality Monitoring in Shellfish Areas, 2015 (PDF / HTML)

Paramètres physicochimiques et bactériologiques

Water Quality in the Fluvial section - Physicochemical and Bacteriological Parameters, 4th Ed. (PDF / HTML)

Safety of Potential Freshwater Swimming Sites, 2nd Ed., 2006

Previous editions of monitoring sheets are available in the catalog of publications.

The monitoring program for potential swimming sites in the St. Lawrence River, ongoing since 2003, has led to the production of a detailed overview to allow for observation of changes. Bacteriological quality exhibits interannual variability that is now well documented. In 2010, this program was consequently placed on hiatus until the next major improvements are implemented, notably the disinfection of wastewater from Montréal and construction of additional retention ponds in Québec City. The monitoring program will therefore be resumed at some point, at which time it should indicate a significant improvement in bacteriological quality in the river.