Nibi Metrics
Real-time water levels, forecasts, and alerts for lakes and rivers across Canada and the US. Built on official government data.
Nibi Metrics turns raw gauge readings from official hydrometric networks into something a person standing on a dock can actually use: is the water high or low for today, which way is it moving, and how unusual is this? This page explains where every number on the platform comes from and what we do to it along the way.
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Nottawasaga River near Alliston Water Level
Live river level, flow, historical records and forecast for Nottawasaga River near Alliston in Canada, ON, Canada, built from official government gauge data.
- Location Canada, ON, Canada
- Watershed nottawasaga
- Primary gauge 02ED101 (Water Survey of Canada)
About Nottawasaga River near Alliston
Nottawasaga River near Alliston - A vital waterway within the Nottawasaga watershed.
The Nottawasaga River near Alliston winds through the heart of Ontario, reflecting the dynamic character of its watershed. This river plays an essential role in the local ecosystem and hydrology, delivering water across a drainage area of approximately 329 square kilometres. Serving as a tributary to the broader Nottawasaga Watershed, this river supports a vibrant network of waterways, including notable peers such as the Boyne River and the Coldwater River.
The watershed context
The Nottawasaga River is key to the region's water management and ecology. Fed primarily by snowmelt, the river experiences a seasonal flow pattern that peaks during the spring freshet from late April to May. This surge is crucial for replenishing the river system and sustaining aquatic habitats. In the warmer months, from July to September, the river's flow typically declines due to natural evaporation and lower inflow, a pattern typical of Ontario rivers. As winter approaches, early declines are noted as the river begins to freeze, marking another turning point in the water cycle.
Why the data matters here
Monitoring this river's water levels is essential for a range of stakeholders, from local residents and farmers to anglers and environmentalists. The latest data is vital for understanding the river's health and managing its resources sustainably. Today’s reading from the Nottawasaga River gauge is compared against the median for this calendar day across 49 years of historical records, providing context for current conditions. The analysis, conducted by the Water Survey of Canada, shows shifts in water levels that can indicate trends affecting everything from agricultural irrigation to flood risk management.
How this page is built
Readings come from official government gauges and are rolled into daily records: the daily mean, high and low for every day on record. Each calendar day gets its own baseline from the full history, so the level you see is compared against what this specific date usually looks like rather than an annual average.
How Nibi Metrics works · Water stories
