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 4.85 ft on 2026-09-11 00:00:00 UTC. No NWS minor flood stage is published for this gauge.

Gauge height
4.85 ft
as of 2 hours ago
Streamflow
data refreshed 2 min ago

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 · 2.81–6.98 ft

Nearby gauges

GaugeDistanceCounty
Railroad Cut a Old River near Brentwood CA3.4 miSan Joaquin County
Middle River at Middle River CA4.1 miSan Joaquin County
Grant Line Cn near Tracy CA5.1 miSan Joaquin County
Old River a Bacon Island CA5.4 miSan Joaquin County
Old River near Delta Mendota Canal CA5.8 miSan 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