Current St. Lawrence water levels from official gauges, both sides of the river.
74.68m above IGLD 1985
74.43m above IGLD 1985
74.56m above IGLD 1985
74.39m above IGLD 1985
Updated 2 min ago. Readings refresh about every 30 minutes.
Data: Canadian Hydrographic Service (Fisheries and Oceans Canada) and NOAA CO-OPS. All readings are metres above the IGLD 1985 datum. For navigation and flood decisions use official sources directly.