Live river level, flow, historical records and forecast for Mystic R at Amelia Earhart Dam near Somerville in MA, United States, built from official government gauge data.
Mystic River is a gauged river in the Charles watershed, Massachusetts.
The seasonal pattern here is narrow, but it still matters for anyone watching a bank, landing, or intake. The usual high point comes in August at 105.6 ft (32.19 m), and the usual low point comes in February at 105.01 ft (32.01 m). That is a small annual swing of 7.1 in (18 cm), so day-to-day changes are more likely to be subtle than dramatic in an average year.
For New England, the broader rhythm is spring snowmelt and rain freshet, then quieter summer water. On this reach, the monthly pattern from the record keeps that summer emphasis visible: August sits above February, even though the gap is modest. For a shoreline user, that means the waterline does move through the year, but not by much in a typical season.
The catchment above the station is 62.7 sq mi (162 km2), which is the area feeding this gauge. That is the footprint behind the numbers reported here, not the whole watershed.
The highest level in the record is 106.94 ft (32.6 m), set in May 2010. The lowest is 103.78 ft (31.63 m), set in March 2008. Those two points show the range this reach has already reached during its period of record.
The station has more than 19 years of record, so those marks sit on a modest but useful history. For someone fishing or maintaining a dock, the value is in seeing that the river has already moved well above and below its typical seasonal band, even if the day-to-day swing is often small.
This page’s hero number is most useful when read against the median for this calendar day, not as a raw elevation on its own. The same level can mean something different depending on the season, and the day-median comparison shows whether the river is running high or low for this time of year.
At this station, the reading is published by the U.S. Geological Survey. That context matters because the comparison is built from this gauge’s own record, which is the better guide for local use than a single standalone height.
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.
Real-time water levels, forecasts, and alerts for lakes and rivers in a growing number of countries. Built on official government data.
Nibi Metrics tracks more than 22,890 gauged lakes and rivers in a growing number of countries, reading directly from official federal monitoring networks: the Water Survey of Canada, the United States Geological Survey, Quebec's provincial hydrometric network, the Environment Agency for England, the Scottish Environment Protection Agency, Natural Resources Wales, the Office of Public Works in Ireland (waterlevel.ie), the Norwegian Water Resources and Energy Directorate (NVE), the State of Queensland's, the State of Victoria's, the State of South Australia's, the Northern Territory's and the State of Western Australia's water monitoring networks, the French State's hydrometric network (Vigicrues, through Hub'Eau), the German Federal Waterways and Shipping Administration's gauges (WSV, through PEGELONLINE), and on the Great Lakes the Canadian Hydrographic Service and NOAA. 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.
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.
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.
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.
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.
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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