Matanzas C A Santa Rosa water level

Name: Matanzas C A Santa Rosa water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, California, United States

Directions

Below flood stage

Water level

155.16ft Steady over the last 24 hours

Measured Oct 19, 2026, 06:00 PM PDT (53 min ago)

Flow: 0.0 cfs

History

7 days

Water level Minor flood stage

What this means

Matanzas C A Santa Rosa is at 155.16 ft, in the normal range.

It is 18.14 ft below the flood stage of 173.30 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 155.14 ft and 155.16 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Floating and fishing near Matanzas C A Santa Rosa

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 173.30 ft, 18.14 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

176.00 ft: Major Flooding. Brookwood Avenue and adjacent residences and businesses under several feet of water.
174.50 ft: Moderate Flood Stage. Brookwood Avenue and adjacent businesses and residences under 1 foot of water or more. NWS will issue a Flash Flood Warning, if not yet already issued.
173.30 ft: Minor Flooding. Water levels have reached the left bank floodplain and Brookwood Avenue may begin to flood. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
171.00 ft: Action Stage. Water level is approximately 2.3 feet below flooding onto Brookwood Avenue and adjacent businesses and residences. NWS may issue a Flash Flood Watch, if not yet already issued.
155.16 ft: Right now

Impact statements from the U.S. National Weather Service.

Weather at the gauge

The forecast is not available right now.

Sunrise 07:25 AM Sunset 06:27 PM Daylight 11 hr, 2 min First quarter 64%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Santa Rosa C A Santa RosaRiver gauge	23.21 ft	Below flood stage	−0.01 ft	1.2 mi
Colgan Creek near Santa RosaRiver gauge, Colgan Creek	97.69 ft	Below flood stage	±0	3.0 mi
Santa Rosa C A Willowside Road near Santa RosaRiver gauge, Santa Rosa C A Willowside Road	57.72 ft	Below flood stage	−0.01 ft	5.7 mi
Colgan Creek near SebastopolRiver gauge, Colgan Creek	67.72 ft	Below flood stage	±0	5.7 mi
Laguna De Santa Rosa A Stony Point Road near CotatiRiver gauge, Laguna De Santa Rosa A Stony Point Road	73.20 ft	Below flood stage	±0	6 mi
Copeland C A Rohnert ParkRiver gauge	1.31 ft	Below flood stage	+0.07 ft	7 mi
Laguna De Santa Rosa Creek near SebastopolRiver gauge, Laguna De Santa Rosa Creek	55.47 ft	Below flood stage	+0.01 ft	7 mi
Sonoma Creek A KenwoodRiver gauge	0.0 cfs	Low	±0	8 mi

Questions and answers

What is flood stage for Matanzas C A Santa Rosa?

The official flood stage is 173.30 ft. The level is currently 18.14 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Matanzas C A Santa Rosa today?

On Oct 19, 2026, 06:00 PM PDT, the water level was 155.16 ft. Steady over the last 24 hours.

Is Matanzas C A Santa Rosa rising or falling?

Steady over the last 24 hours.

Is the level of Matanzas C A Santa Rosa normal?

Below flood stage. Judged against the official flood stage for this gauge.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:11466170 (Agency page)
Coordinates: 38.43876, -122.70245 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	155.16 ft	2026-10-20 01:00	Provisional
Flow	0.0 cfs	2026-10-20 01:00	Provisional

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How to cite

U.S. Geological Survey: Matanzas C A Santa Rosa (usgs:11466170). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/matanzas-c-a-santa-rosa

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer