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St. Lawrence Monitoring Sheets

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, shorelines, sediment and uses.

Water

Pictogramme Salubrité des eaux coquillières

Shellfish water quality in the Estuary and Gulf of St. Lawrence, 2021

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Pictogramme de l’indicateur débit et niveau d’eau

Changes in water levels and flows in the St. Lawrence River

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Water quality

Contamination of water by toxic substances 

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Contamination by toxic substances

Water quality in the Richelieu and Yamaska rivers, 2020

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Pictogramme Salubrité des eaux coquillières

Marine Water Quality Monitoring in Shellfish Areas, 2015

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Indicateur de la contamination de l’eau par les toxiques

Water quality of the fluvial sector - Contamination by toxic substances, 2017

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Pictogramme qualité de l’eau des rivières Richelieu et Yamaska

 

Water quality of the Richelieu and Yamaska rivers, 2015

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Paramètres physicochimiques et bactériologiques

Water Quality in the Fluvial section - Physicochemical and Bacteriological Parameters, 4th Ed., 2015

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Pictogramme de Processus océanographiques

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

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Pictogramme salubrité des sites potentiels de baignade en eau douce

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

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Biological Resources

Northern Gannet pictogram intermediate indocato

A sentinel species for the gulf, 4th edition, 2021

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Beluga image

St. Lawrence Estuary beluga whale, 4th edition, 2021

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Phytoplankton Pictogram

Phytoplankton, toxic algae and zooplankton in the estuary and Gulf of St. Lawrence, 2021

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Pictogramme de Processus océanographiques

Oceanographic processes: Temperatures, dissolved oxygen and acidification, 2021

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Seabirds

Seabirds - Sentinel Species for the Gulf, 3rd Ed., 2014

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What is the status of benthic communities in the St. Lawrence River?

What is the status of benthic communities in the St. Lawrence River?

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Status of fish communities of the freshwater and brackish waters of the St. Lawrence

Status of fish communities of the freshwater and brackish waters of the St. Lawrence

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Pictogramme d'un bar rayé

The successful reintroduction of striped bass in the St. Lawrence River: from initial stocking to population monitoring, 2018

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Pictogramme d'espèces animales aquatiques envahissantes

Aquatic invasive animal species in the freshwater section of the St. Lawrence River, 2018

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Pictogramme d'espèces aquatiques envahissantes du Saint-Laurent marin

Aquatic invasive species in the marine section of the St. Lawrence, 2017

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Pictogramme de contamination des poissons d’eau douce par les toxiques

Toxic Contamination of Freshwater Fish, 3rd Ed., 2016

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Pictogramme d'un grand héron

Great Blue Heron - A Sentinel Species for the River, 3rd Ed., 2015

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Pictogramme des milieux humides en eau douce

Freshwater Wetlands, 3rd Ed., 2014

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Pictogramme des communautés benthiques

What is the status of benthic communities in Lake Saint-Pierre?, 3ed Ed., 2016

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Pictogramme d'espèces végétales exotiques envahissantes

Invasive alien plant species of the St. Lawrence wetlands, 2019

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Shorelines

Pictogramme de l'occupation du sol

Suivi de l'occupation du sol le long du Saint-Laurent en 2015

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Pictogramme de l'occupation du sol

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

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Sediments

Sediment Quality Status of Lake Saint-François in 2018

Sediment Quality Status of Lake Saint-François in 2018

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Pictogramme des sédiments

Sediment quality in the fluvial section of the St. Lawrence, 2019

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Pictogramme des sédiments

Sediment quality in the St. Lawrence River in the Quebec sector in 2012 and its evolution since 1989

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Pictogramme des sédiments

Butyltins in Sediments of the St. Lawrence River, 2014

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Pictogramme des sédiments

 

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

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Pictogramme des sédiments

Sediment quality status of Lake Saint-Louis in 2015

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Pictogramme des sédiments

Sediment quality status of Lake Saint-Pierre in 2013

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Pictogramme des sédiments

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

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Uses

Pictogramme de contamination des poissons d’eau douce par les toxiques

Toxic Contamination of Freshwater Fish, 3rd Ed., 2016

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Pictogramme pour la qualité des eaux marines dans les secteurs coquilliers

Marine Water Quality Monitoring in Shellfish Areas, 2015

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Pictogramme pour les paramètres physicochimiques et bactériologiques

Water Quality in the Fluvial section - Physicochemical and Bacteriological Parameters, 4th Ed.

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Pictogramme pour salubrité des sites potentiels de baignade en eau douce

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

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

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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. The program was resumed in 2017 to set up an updated status report before the finalizing of wastewater disinfection works in Montreal and to highlight a clear improvement of the bacteriological quality of the river, as a result of these.