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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.

Water Stories

The flood of record that was overtaken

For five years, spring 2019 was the mark every Lake Muskoka decision answered to. In April 2026 the lake went two centimeters higher - and the official books have not caught up yet.

Why the Assiniboine floods every spring

Inside the freshet cycle that puts Manitoba shorelines at risk each year - and why 2026 broke the script.

How snowpack becomes summer water

The science of snow water equivalent and why it drives the season ahead.

Reading a staff gauge like a hydrologist

What the numbers on the measuring stick actually tell you.

Flash Flood Alley: how Texas rivers rise in hours

Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.

What a "100-year flood" actually means

One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.

St. Marys River at Stillwater Water Level

Live river level, flow, historical records and forecast for St. Marys River at Stillwater in Canada, NS, Canada, built from official government gauge data.

About St. Marys River at Stillwater

St. Marys River - A dynamic flow shaped by rainfall.

The St. Marys River at Stillwater is an important waterway located in Nova Scotia, draining a catchment of approximately 1,340 square kilometers. This region experiences distinct annual hydrological patterns, characterized primarily by rain-driven floods in the fall and winter, followed by a brief spring melt. During these seasons, the river can respond rapidly to rainfall accumulation, making monitoring essential for understanding water levels and discharge dynamics.

The watershed context

The St. Marys River flows through the St. Marys watershed, a landscape shaped by the passage of time and natural processes. The river collects water from its extensive drainage area, helping to channel rainfall and snowmelt into the system. With no parent river, the St. Marys River stands as a significant feature on its own within the local hydrology, crucial for the ecosystem and communities nearby.

As we consider the watershed's health and integrity, the variability in flow during different seasons highlights the need to be attentive to water levels. The responsiveness of smaller basins, like those surrounding the St. Marys River, further emphasizes the importance of observing precipitation patterns and their direct effects on local water bodies.

Why the data matters here

Today's readings from the St. Marys River at Stillwater, measured through Water Survey of Canada at station 01EO001, provide critical insight into the river's current status. Understanding today's flow compared to the median level for this date across the past 15 years is vital. Such data helps gauge the river's health and anticipate conditions that could lead to flooding or other impacts on the surrounding ecosystem and communities.

Monitoring water levels effectively allows anglers, cottagers, and local residents to make informed decisions regarding their activities and preparedness, especially given the region’s susceptibility to rapid changes in water flow. By comparing today's measurements to historical averages, stakeholders gain a clearer picture of the river's behavior, highlighting the importance of this ongoing water intelligence in Nova Scotia's diverse landscape.

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