USGS Surface Water for USA: Streamflow Measurements

USGS Home
Contact USGS
Search USGS

National Water Information System: Web Interface

USGS Water Resources

Data Category:
Geographic Area:

Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins

Due to a lapse in government funding, the majority of USGS websites will not be updated except to provide important public safety information. Websites displaying real-time water data will be updated with limited support. For more information please see www.doi.gov/shutdown.
Explore the NEW USGS National Water Dashboard interactive map to access real-time water data from over 13,500 stations nationwide.

Streamflow Measurements for the Nation

USGS 11162735 SAN MATEO C AB JUNCTION BOX A DAM1 NR HILLSBOROUGH

San Mateo County, California

Hydrologic Unit Code 18050004

Latitude 37°33'25.1", Longitude 122°25'05.7" NAD83

Drainage area 2.1 square miles

Gage datum 648.36 feet above NAVD88

**Output formats**
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
Graph of data
Reselect output format

Output formats

HTML table with channel data

HTML table without channel data

Tab-separated data with channel data

Tab-separated data without channel data

Graph of data

Reselect output format

Meas. Number	Date Time	Time Datum	Measurement Used?	Who	Measuring Agency	Stream flow (ft³/s)	Gage Height (ft)	GH Change (ft)	Meas. Duration (hr)	Meas. Rated	Control	Flow Adjust. Code
40	2025-08-07 14:47	PDT	Yes	MDAVAULT/JEV	USGS	0.00				Unspecified		NONE
39	2025-07-03 15:14:39	PDT	Yes	AGUERRIE	USGS	0.03	0.30	0.00	0.40	Poor	VegetationHeavy	NONE
38	2025-05-28 15:16:51	PDT	Yes	MDAVAULT	USSG	0.26	0.31	0.01	0.50	Poor	VegetationHeavy	NONE
37	2025-04-24 11:14:03	PDT	Yes	MDAVAULT	USGS	0.72	0.31	0.01	0.40	Fair	VegetationModerate	NONE
36	2025-03-11 12:54:25	PDT	Yes	MDAVAULT	USGS	1.28	0.35	0.01	0.60	Fair	VegetationLight	NONE
35	2025-02-10 11:06:31	PST	Yes	TNAKAMURA/RB	USGS	10.4	0.67	-0.01	0.50	Good	Clear	OTHR
34D	2025-02-04 17:30	PST	Yes	TNAKAMURA/MD	USGS	81.0	1.85	0.00	0.10	Poor		NONE
34C	2025-02-04 17:00	PST	Yes	TNAKAMURA/MD	USGS	72.9	1.74	0.00	0.10	Poor		NONE
34B	2025-02-04 11:00	PST	Yes	TNAKAMURA/MD	USGS	57.7	1.60	0.00	0.10	Poor		NONE
34A	2025-02-04 09:30	PST	Yes	TNAKAMURA/MD	USGS	50.7	1.47	0.00	0.10	Poor		NONE
34	2025-01-06 11:26:21	PST	Yes	TNAKAMURA	USGS	2.81	0.42	0.00	0.40	Good	VegetationLight	NONE
33A	2024-12-29 12:00	PST	Yes	TNAKAMURA/MD	USGS	27.9	1.04	0.00	0.10	Poor		NONE
33	2024-12-03 13:04:59	PST	Yes	MDAVAULT	USGS	0.48	0.29	0.01	0.40	Fair	VegetationModerate	NONE
32	2024-10-24 12:00	PDT	Yes	TNAKAMURA/DM	USGS	0.00				Unspecified	NoFlow	NONE
31	2024-07-17 13:02:25	PDT	Yes	MDAVAULT	USGS	0.03	0.26	0.01	0.50	Poor	VegetationHeavy	NONE
30	2024-06-05 13:19:34	PDT	Yes	MDAVAULT/JEV	USGS	0.35	0.35	0.00	0.70	Poor	VegetationModerate	NONE
29	2024-04-23 12:38:51	PDT	Yes	MDAVAULT	USGS	1.72	0.38	0.00	0.40	Good	DebrisModerate	NONE
28	2024-03-25 11:49:31	PDT	Yes	MDAVAULT	USGS	3.38	0.44	0.00	0.60	Fair	DebrisModerate	NONE
27	2024-02-27 13:05:15	PST	Yes	MDAVAULT	USGS	5.46	0.52	0.00	0.30	Good	Clear	NONE
26	2024-01-26 15:37:58	PST	Yes	MDAVAULT	USGS	11.5	0.71	0.00	0.40	Good	Clear	NONE
25	2023-12-22 12:24:09	PST	Yes	MDAVAULT	usgs	0.54	0.39	0.00	0.50	Fair	VegetationHeavy	NONE
24	2023-10-12 15:45	PDT	Yes	TNAKAMURA/MD	USGS	0.00				Unspecified	NoFlow	NONE
23	2023-07-18 14:20:07	PDT	Yes	MDAVAULT	USGS	0.05	0.29	0.00	0.50	Poor	VegetationHeavy	NONE
22	2023-06-15 10:52	PDT	Yes	MDAVAULT	USGS	0.25	0.34	0.00	0.60	Poor	VegetationHeavy	NONE
21	2023-05-11 14:24:57	PDT	Yes	MDAVAULT/LCA	USGS	0.84	0.36	0.00	0.50	Fair	VegetationLight	NONE
20	2023-03-23 11:53:30	PDT	Yes	MDAVAULT	USGS	32.5	1.14	-0.01	0.60	Good	Clear	NONE
19	2023-03-01 14:57:40	PST	Yes	MDAVAULT	USGS	16.4	0.81	0.00	0.50	Fair	Clear	NONE
18	2023-01-25 13:13:10	PST	Yes	MDAVAULT	USGS	3.97	0.45	0.00	0.40	Fair	Clear	NONE
17	2022-12-29 09:53:18	PST	Yes	MDAVAULT	USGS	4.34	0.48	0.00	0.60	Fair	DebrisLight	NONE
16	2022-12-27 14:24:13	PST	Yes	MDAVAULT	USGS	22.8	0.96	-0.03	0.40	Good	Clear	NONE
15	2022-12-13 12:32:17	PST	Yes	MDAVAULT	USGS	0.20	0.32	0.00	0.60	Fair	DebrisModerate	NONE
14	2022-10-19 11:43	PDT	Yes	MDAVAULT/BDC	USGS	0.00				Unspecified		NONE
13	2022-07-21 12:02:15	PDT	Yes	MDAVAULT	USGS	0.00				Unspecified	NoFlow	NONE
12	2022-06-15 17:08:28	PDT	Yes	MDAVAULT	USGS	0.05	0.21	0.00	0.20	Poor	DebrisHeavy	NONE
11	2022-05-06 11:03:04	PDT	Yes	RCTHOMAS	USGS	0.21	0.24	0.00	0.40	Poor	DebrisLight	NONE
10	2022-03-25 14:55:24	PDT	Yes	LCANNAR/RCTH	USGS	0.29	0.23	0.00	0.60	Fair	VegetationModerate	NONE
9	2022-02-23 14:28:13	PST	Yes	LCANNAR/SMUL	USGS	0.38	0.24	0.00	0.70	Fair	VegetationLight	NONE
8F	2021-12-15 14:00	PST	No
7F	2019-02-13 12:48	PST	No
6F	2019-01-15 13:20	PST	No
5F	2017-03-22 14:30	PDT	No
4F	2016-12-09 11:55	PST	No
3F	2015-05-14 15:00	PDT	No
2F	2011-02-16 11:40	PST	No
1F	2010-12-20 11:29	PST	No

Meas.
Number

Date Time

Time
Datum

Measurement
Used?

Who

Measuring
Agency

Stream
flow
(ft³/s)

Gage
Height
(ft)

GH
Change
(ft)

Meas.
Duration
(hr)

Meas.
Rated

Control

Flow
Adjust.
Code

2025-08-07 14:47

PDT

Yes

MDAVAULT/JEV

USGS

0.00

Unspecified

NONE

2025-07-03 15:14:39

PDT

Yes

AGUERRIE

USGS

0.03

0.30

0.00

0.40

Poor

VegetationHeavy

NONE

2025-05-28 15:16:51

PDT

Yes

MDAVAULT

USSG

0.26

0.31

0.01

0.50

Poor

VegetationHeavy

NONE

2025-04-24 11:14:03

PDT

Yes

MDAVAULT

USGS

0.72

0.31

0.01

0.40

Fair

VegetationModerate

NONE

2025-03-11 12:54:25

PDT

Yes

MDAVAULT

USGS

1.28

0.35

0.01

0.60

Fair

VegetationLight

NONE

2025-02-10 11:06:31

PST

Yes

TNAKAMURA/RB

USGS

10.4

0.67

-0.01

0.50

Good

Clear

OTHR

34D

2025-02-04 17:30

PST

Yes

TNAKAMURA/MD

USGS

81.0

1.85

0.00

0.10

Poor

NONE

34C

2025-02-04 17:00

PST

Yes

TNAKAMURA/MD

USGS

72.9

1.74

0.00

0.10

Poor

NONE

34B

2025-02-04 11:00

PST

Yes

TNAKAMURA/MD

USGS

57.7

1.60

0.00

0.10

Poor

NONE

34A

2025-02-04 09:30

PST

Yes

TNAKAMURA/MD

USGS

50.7

1.47

0.00

0.10

Poor

NONE

2025-01-06 11:26:21

PST

Yes

TNAKAMURA

USGS

2.81

0.42

0.00

0.40

Good

VegetationLight

NONE

33A

2024-12-29 12:00

PST

Yes

TNAKAMURA/MD

USGS

27.9

1.04

0.00

0.10

Poor

NONE

2024-12-03 13:04:59

PST

Yes

MDAVAULT

USGS

0.48

0.29

0.01

0.40

Fair

VegetationModerate

NONE

2024-10-24 12:00

PDT

Yes

TNAKAMURA/DM

USGS

0.00

Unspecified

NoFlow

NONE

2024-07-17 13:02:25

PDT

Yes

MDAVAULT

USGS

0.03

0.26

0.01

0.50

Poor

VegetationHeavy

NONE

2024-06-05 13:19:34

PDT

Yes

MDAVAULT/JEV

USGS

0.35

0.00

0.70

Poor

VegetationModerate

NONE

2024-04-23 12:38:51

PDT

Yes

MDAVAULT

USGS

1.72

0.38

0.00

0.40

Good

DebrisModerate

NONE

2024-03-25 11:49:31

PDT

Yes

MDAVAULT

USGS

3.38

0.44

0.00

0.60

Fair

DebrisModerate

NONE

2024-02-27 13:05:15

PST

Yes

MDAVAULT

USGS

5.46

0.52

0.00

0.30

Good

Clear

NONE

2024-01-26 15:37:58

PST

Yes

MDAVAULT

USGS

11.5

0.71

0.00

0.40

Good

Clear

NONE

2023-12-22 12:24:09

PST

Yes

MDAVAULT

usgs

0.54

0.39

0.00

0.50

Fair

VegetationHeavy

NONE

2023-10-12 15:45

PDT

Yes

TNAKAMURA/MD

USGS

0.00

Unspecified

NoFlow

NONE

2023-07-18 14:20:07

PDT

Yes

MDAVAULT

USGS

0.05

0.29

0.00

0.50

Poor

VegetationHeavy

NONE

2023-06-15 10:52

PDT

Yes

MDAVAULT

USGS

0.25

0.34

0.00

0.60

Poor

VegetationHeavy

NONE

2023-05-11 14:24:57

PDT

Yes

MDAVAULT/LCA

USGS

0.84

0.36

0.00

0.50

Fair

VegetationLight

NONE

2023-03-23 11:53:30

PDT

Yes

MDAVAULT

USGS

32.5

1.14

-0.01

0.60

Good

Clear

NONE

2023-03-01 14:57:40

PST

Yes

MDAVAULT

USGS

16.4

0.81

0.00

0.50

Fair

Clear

NONE

2023-01-25 13:13:10

PST

Yes

MDAVAULT

USGS

3.97

0.45

0.00

0.40

Fair

Clear

NONE

2022-12-29 09:53:18

PST

Yes

MDAVAULT

USGS

4.34

0.48

0.00

0.60

Fair

DebrisLight

NONE

2022-12-27 14:24:13

PST

Yes

MDAVAULT

USGS

22.8

0.96

-0.03

0.40

Good

Clear

NONE

2022-12-13 12:32:17

PST

Yes

MDAVAULT

USGS

0.20

0.32

0.00

0.60

Fair

DebrisModerate

NONE

2022-10-19 11:43

PDT

Yes

MDAVAULT/BDC

USGS

0.00

Unspecified

NONE

2022-07-21 12:02:15

PDT

Yes

MDAVAULT

USGS

0.00

Unspecified

NoFlow

NONE

2022-06-15 17:08:28

PDT

Yes

MDAVAULT

USGS

0.05

0.21

0.00

0.20

Poor

DebrisHeavy

NONE

2022-05-06 11:03:04

PDT

Yes

RCTHOMAS

USGS

0.21

0.24

0.00

0.40

Poor

DebrisLight

NONE

2022-03-25 14:55:24

PDT

Yes

LCANNAR/RCTH

USGS

0.29

0.23

0.00

0.60

Fair

VegetationModerate

NONE

2022-02-23 14:28:13

PST

Yes

LCANNAR/SMUL

USGS

0.38

0.24

0.00

0.70

Fair

VegetationLight

NONE

2021-12-15 14:00

PST

2019-02-13 12:48

PST

2019-01-15 13:20

PST

2017-03-22 14:30

PDT

2016-12-09 11:55

PST

2015-05-14 15:00

PDT

2011-02-16 11:40

PST

2010-12-20 11:29

PST