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Official. Public. Transparent.

All data comes directly from official government sources. We aggregate, timestamp, and present agency data without replacing the source record.

Our data sources

USGS

usgs waterdata

USGS Water Data

Data provided by the U.S. Geological Survey

Observations
Agency
U.S. Geological Survey
Last sync
NWPS

nwps

NOAA NWPS

Forecasts from NOAA National Water Prediction Service

ForecastsFlood stages
Agency
National Weather Service
Last sync
NWS

nws alerts

NWS Alerts

Weather alerts from the National Weather Service

Alerts
Agency
National Weather Service
Last sync
EPA

epa hows my waterway

EPA How's My Waterway

Context links from EPA How's My Waterway and ATTAINS

Agency
U.S. Environmental Protection Agency
Last sync
Sync time unavailable
RIVE

riverstatus app

RiverStat.us app data

Derived RiverStat.us cache, rollup, and search rows

ObservationsForecastsFlood stages
Agency
RiverStat.us
Last sync
USAC

usace rivergages

USACE Rivergages

Historical river stage data from USACE Rivergages

Observations
Agency
U.S. Army Corps of Engineers
Last sync
CDEC

cdec

California Data Exchange Center

Historical river stage data from California Data Exchange Center

Observations
Agency
California Department of Water Resources
Last sync
Sync time unavailable
WSC

wsc

Water Survey of Canada

Historical hydrometric data from Water Survey of Canada

Observations
Agency
Environment and Climate Change Canada
Last sync
Sync time unavailable
MN_D

mn dnr csg

Minnesota Cooperative Stream Gaging

Historical stream level and discharge data from Minnesota Cooperative Stream Gaging

Observations
Agency
Minnesota Department of Natural Resources
Last sync
Sync time unavailable
USBR

usbr hydromet

USBR Hydromet

Historical stage and discharge data from USBR Hydromet

Observations
Agency
U.S. Bureau of Reclamation
Last sync
Sync time unavailable
Attribution

Rights and data ownership remain with the respective agencies.

USGS WATERDATA USGS Water DataNWPS NOAA NWPSNWS ALERTS NWS AlertsEPA HOWS MY WATERWAY EPA How's My WaterwayRIVERSTATUS APP RiverStat.us app dataUSACE RIVERGAGES USACE RivergagesCDEC California Data Exchange CenterWA ECOLOGY Washington Freshwater DataStreamWSC Water Survey of CanadaMN DNR CSG Minnesota Cooperative Stream GagingUSBR HYDROMET USBR Hydromet

Update cadence at a glance

USGS gauges

15 min - 1 hr

Typical update
NWPS forecasts

Every 6 hours

Typical update
NWS alerts

Real-time

As issued
EPA water quality

Quarterly

Typical update

Common questions about sources

Why do I see different values than another site?

Values can differ by observation time, parameter, quality flags, and source refresh cadence.

Why are some gauges or forecasts missing?

RiverStat.us displays only source-backed data that is linked and persisted in the database.

How often is data updated?

Each source has its own cadence; freshness is shown where the API provides timestamps.

RiverStat.us is an independent public data viewer and is not affiliated with USGS or NOAA.

A clear view of U.S. river conditions, gauges, and forecasts.

RiverStat.us aggregates public water data from official and public sources. Data may be delayed, provisional, missing, incorrect, or later corrected by the source.

Data from USGS Water Data and NOAA/NWS.