USGS - science for a changing world

Current California Streamflow Conditions

The colored dots on this map depict streamflow conditions as a percentile, which is computed from the period of record for the current day of the year. Only stations with at least 30 years of record are used. The white circles indicate other stations that were not ranked in percentiles either because they have fewer than 30 years of record or because they report parameters other than streamflow. Some stations, for example, measure stage only.

USGS WaterNow

Get current-conditions for water data directly to your mobile phone or email.

Get Water Alerts

National Water Data

USGS National Water Information System (NWIS)

National Water Information System: Mapper

National Water Watch

Water Resources of the United States

* DOI and USGS link and privacy policies apply.