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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Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.
One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.
Agua Fria River near Mayer Water Level
Live river level, flow, historical records and forecast for Agua Fria River near Mayer in AZ, United States, built from official government gauge data.
- Location AZ, United States
- Watershed agua fria
- Primary gauge 09512500 (USGS)
About Agua Fria River near Mayer
Agua Fria River - a pulse of life in Arizona's dry landscape.
The Agua Fria River near Mayer flows through a region characterized by the dramatic rhythms of the Arid Southwest hydrology. With its watershed spanning approximately 585 square miles, the river is vital to the ecological fabric of the area, serving as a conduit for the seasonal torrents that can reshape the landscape. The watershed's dynamics are driven by summer monsoon thunderstorms that lead to rapid flash floods, while winter storms and high-country snowmelt contribute to flows in larger rivers downstream. The Agua Fria River plays an essential role in this system, offering a vital source of water when many channels run dry.
The watershed context
The Agua Fria River is situated in a watershed that influences both the flora and fauna that depend on its waters. Nearby, other water bodies like the Agua Fria River near Rock Springs and New River near Rock Springs share the responsibilities of sustaining ecosystems in this arid region. These neighboring rivers often intersect in their hydrological stories, together supporting the diverse habitats that thrive during periods of rainfall.
During the summer, rainfall can dramatically raise the river’s flow, followed by drier conditions that lead to declines as evaporation and reduced inflows take their toll. Winter storms often bring additional water to the region, resulting in a complex interplay between the water levels in the Agua Fria and surrounding streams, which contributes to the overall health of the watershed.
Why the data matters here
Today's observations of the Agua Fria River, monitored by the U.S. Geological Survey (USGS), are critical for understanding this dynamic system. Monitoring discharge levels helps assess the volume of water moving through the river, which is particularly important in a region where rapid flooding can occur. Every reading provides insights not just into the current conditions, but when compared to the median for this calendar day across the station’s historical record—spanning more than 50 years—it allows for meaningful context. This crucial comparison helps indicate whether the river's flow is above or below typical levels, informing local communities about potential flooding risks or drought conditions while enabling better management of this essential resource.
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
