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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.

Nanaimo River near Cassidy Water Level

Live river level, flow, historical records and forecast for Nanaimo River near Cassidy in Canada, BC, Canada, built from official government gauge data.

About Nanaimo River near Cassidy

Nanaimo River - a vital waterway of South Central Vancouver Island.

The Nanaimo River flows through the heart of South Central Vancouver Island, offering a rich aquatic environment that supports both natural ecosystems and human activities. This intriguing river emerges as a vital conduit in this region’s intricate hydrology, with a catchment area spanning approximately 675 square kilometres above the gauging station. It serves as a key resource for local communities, anglers, and those enjoying the stunning landscapes of the island.

The watershed context

The Nanaimo River weaves through a dynamic watershed on Vancouver Island, bordered by various tributaries and peers such as Ash River and Englishman River. Nestled within a mountainous landscape, this river experiences a freshet driven by seasonal snowpack from late spring to early summer, usually peaking between May and July. During this freshet, water levels rise significantly due to snowmelt, contributing vital flows to the river and its ecosystem. The health of this aquatic corridor is essential, influencing the surrounding flora and fauna, while also sustaining agricultural and recreational needs of the region.

Why the data matters here

The hydrological data from the Nanaimo River near Cassidy, monitored by the Water Survey of Canada, provides invaluable insights into the river's flow conditions. Today's reading can be compared to the median for this calendar day across the station's historical record of nearly 49 years. This context allows for a better understanding of current flows amidst seasonal variations, highlighting trends and potential anomalies in water volume. By offering context to streamflow measurements, this data is critical for both conservation efforts and community planning in the watershed, contributing to responsible water resource management in this vibrant area of British Columbia.

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