Old River near Byron CA

Contra Costa County, California · USGS gauge 11313315 · NWS OHFC1 · Old River flood status · California river levels

Is Old River near Byron CA flooding right now?

Old River near Byron CA measured 5.74 ft on 2026-10-27 17:00:00 UTC. No NWS minor flood stage is published for this gauge.

Gauge height

5.74 ft

as of 59 min ago

Streamflow

4,340 cfs

data refreshed 13 min ago

Streamflow outlook

NOAA National Water Model forecast, issued 12 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

No National Weather Service flood stage is published for this gauge, so no flood category can be shown — why some gauges have no flood stage.

Last 7 days

Past 7 days · 3.21–7.32 ft

Nearby gauges

Gauge	Distance	County
Railroad Cut a Old River near Brentwood CA	3.4 mi	San Joaquin County
Middle River at Middle River CA	4.1 mi	San Joaquin County
Grant Line Cn near Tracy CA	5.1 mi	San Joaquin County
Old River a Bacon Island CA	5.4 mi	San Joaquin County
Old River near Delta Mendota Canal CA	5.8 mi	San Joaquin County

Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast