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
 | Water quality in the fluvial section Physicochemical and bacteriological parameters–5th edition |
 | Safety of potential freshwater St. Lawrence swimming sites – 3rd edition, 2021 |
 | Shellfish water quality in the Estuary and Gulf of St. Lawrence, 2021 |
 | Changes in water levels and flows in the St. Lawrence River |
 | Contamination of water by toxic substances |
 | Water quality in the Richelieu and Yamaska rivers, 2020 |
| Marine Water Quality Monitoring in Shellfish Areas, 2015 |
 | Water quality of the fluvial sector - Contamination by toxic substances, 2017 |
| Water quality of the Richelieu and Yamaska rivers, 2015 |
 | Oceanographic Processes in the Estuary and Gulf, 3rd Ed., 2014 |
Biological Resources
 | Freshwater Wetlands – 4th edition, 2022 |
| Toxic Contamination of Freshwater Fish, 4th Ed., 2021 |
 | A sentinel species for the gulf, 4th edition, 2021 |
 | St. Lawrence Estuary beluga whale, 4th edition, 2021 |
 | Phytoplankton, toxic algae and zooplankton in the estuary and Gulf of St. Lawrence, 2021 |
| Oceanographic processes: Temperatures, dissolved oxygen and acidification, 2021 |
 | Seabirds - Sentinel Species for the Gulf, 3rd Ed., 2014 |
 | What is the status of benthic communities in the St. Lawrence River? Ed., 2020 |
 | Status of fish communities of the freshwater and brackish waters of the St. Lawrence |
| The successful reintroduction of striped bass in the St. Lawrence River: from initial stocking to population monitoring, 2018 |
 | Aquatic invasive animal species in the freshwater section of the St. Lawrence River, 2018 |
 | Aquatic invasive species in the marine section of the St. Lawrence, 2017 |
| Great Blue Heron - A Sentinel Species for the River, 3rd Ed., 2015 |
 | Invasive alien plant species of the St. Lawrence wetlands, 2019 |
Shorelines
 | Suivi de l'occupation du sol le long du Saint-Laurent en 2015 |
| Land Cover along the Great Lakes and the St. Lawrence River, 2010 |
Sediments
 | Sediment Quality Status of Lake Saint-François in 2018 |
| Sediment quality in the fluvial section of the St. Lawrence, 2019 |
| Sediment quality in the St. Lawrence River in the Quebec sector in 2012 and its evolution since 1989 |
| Butyltins in Sediments of the St. Lawrence River, 2014 |
| Polybrominated diphenyl ethers in the suspended matter and sediments of the St. Lawrence River, 2013 |
| Sediment quality status of Lake Saint-Louis in 2015 |
| Sediment quality status of Lake Saint-Pierre in 2013 |
| Toxic Contamination in Sediments – Lake Saint-François: A Century-Old Story, 2002 |
Uses
| Marine Water Quality Monitoring in Shellfish Areas, 2015 |
| Water Quality in the Fluvial section - Physicochemical and Bacteriological Parameters, 4th Ed. |
Previous editions of the monitoring sheets are available in the catalog of publications.
Consult 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. 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.