Stewart River near Mayo Water Level
Live river level, flow, historical records and forecast for Stewart River near Mayo in YT, Canada, built from official government gauge data.
- Location YT, Canada
- Watershed upper stewart
- Primary gauge 09DC006 (Water Survey of Canada)
About Stewart River near Mayo
Stewart River near Mayo is a gauged river in the Upper Stewart watershed in Yukon.
What the record shows
The record high is 9.73 m (31.91 ft), set in June 1992. The record low is 2.61 m (8.57 ft), set in November 2018. Over 46 years on record, that spread is wide enough to matter for banks, launch sites, and any intake set close to the waterline.
The seasonal pattern is clear. June is the usual high month at 6.34 m (20.78 ft), while March is the usual low month at 3.34 m (10.96 ft). The typical annual swing is 3 m (9.8 ft). For anyone keeping a dock or shoreline setup in place, that is the range to plan around each year.
The watershed
The station drains 31650 km2 (12220 sq mi) above the gauge. That is the area feeding this reading, not the watershed as a whole. In a subarctic mountain setting, the broad pattern is a late-spring to midsummer high and a winter low, so this reach asks for room in June and more caution in late winter and early spring.
Reading the hero number
The number on the page is most useful when you compare today’s level with the median for this calendar day across the station record. That shows whether the river is sitting above or below its usual level for this date, instead of just how high it looks in metres.
This station has 46 years of record, so the day-of-year median gives a better sense of where the river stands within its own cycle than a raw elevation does. Water Survey of Canada is the operating agency for this site.
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
Nibi Metrics - live water levels, flow, and forecasts for lakes and rivers across Canada, the US and the UK
Real-time water levels, forecasts, and alerts for lakes and rivers across Canada, the US and the UK. Built on official government data.
Nibi Metrics tracks more than 13,000 gauged lakes and rivers across Canada, the United States and the United Kingdom, reading directly from official federal monitoring networks: the Water Survey of Canada, the United States Geological Survey, Quebec's provincial hydrometric network, and the Environment Agency for England. Every number on the platform is measured, not modelled - taken from a government gauge on the water itself and compared against that location's own historical record for this exact date.
What you can see for any monitored lake or river
The level right now, in feet or metres, updated as the source agency publishes new readings - for many stations that is every five to fifteen minutes. How today compares to typical: every location carries its own typical-for-this-date band built from its historical record, so a reading is never just a number - it is above, below, or near what this water usually does on this calendar day. Which way it is moving: a measured RISING, FALLING, or STEADY verdict computed from the gauge's own recent readings, with the rate of change - the difference between a flood ending and one beginning. What comes next: level forecasts up to 72 hours ahead, driven by the gauge's recent behaviour, upstream water, and quantitative precipitation forecasts, alongside live radar, lightning, and weather for the surrounding region.
Alerts that watch the water for you
Set a threshold on any location - a level, a distance above typical, or a rate of climb - and Nibi emails or notifies you the moment the gauge crosses it. Cottagers use it for spring freshet, anglers for river conditions, marinas and municipalities for operations. The scanning runs around the clock against the same measured data shown on every page.
Where Nibi comes from
Nibi means water in Anishinaabemowin. The platform began at a family cottage on Lake Muskoka, Ontario, where the spring melt floods the shoreline most years and the only forecast was standing on the dock, looking, and guessing. It grew into an independent, member-funded platform run by Muskoka Research Inc. - no investors, no data resale, and a privacy policy shorter than most cookie banners. The core data is free for everyone, forever; paid plans add automation like multi-location alerts, deep history, and reports.
Coverage
Nibi spans the continent: every Canadian province and territory with active federal gauges - from Vancouver Island rivers to the Muskoka lakes, prairie reservoirs, and Quebec's hydrometric network - and the United States from Maine to the Texas Hill Country, the Ohio Valley, and the Pacific Northwest. Coverage grows where the water news is: when a basin floods, its gauges join the platform with their full historical records attached. Many stations report every five to fifteen minutes; most report at least hourly; every page states exactly when its gauge last spoke.
Free forever, funded by members
The core promise is simple: the water data is free, for everyone, forever. Live levels, maps, radar, and recent history never sit behind a paywall. Paid plans fund the platform by adding automation - multi-location alerts, decades of history, longer forecasts, and PDF reports - so the people who need more carry the cost for everyone who just needs to check the lake before driving up. There are no investors and no advertising deals shaping what the data says.
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