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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 11046370 SAN MATEO C A SAN ONOFRE CA
San Diego County, California
Hydrologic Unit Code 18070301
Latitude  33°23'28", Longitude 117°35'23" NAD27
Drainage area 132  square miles
Gage datum 20.00 feet above NGVD29
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 		 Channel
Number		 Channel
Name		 Meas.
type 		 Stream
flow
method 		 Velocity
method 		 Channel
flow
(ft3/s)		 Channel
width
(ft)		 Channel
area
(ft2)		 Channel
vel.
(ft/s)		 Channel
stability 		 Channel
material 		 Channel
evenness 		 Long.
vel.
desc. 		 Horz.
vel.
desc. 		 Vert.
vel.
desc. 		 Channel
loc.
code 		 Channel
loc.
dist.(ft)
582003-01-06 12:00PSTYesJLAUSGS0.04 Fair NONE1Imported Channel 1OTHRQFLUM 0.04 UNSPUNSPUNSPunknUNSPUNSPUNSP
572002-12-05 11:41PSTYesJLAUSGS0.05 Fair NONE1Imported Channel 1OTHRQFLUM 0.05 UNSPUNSPUNSPunknUNSPUNSPUNSP
562002-11-13 10:55PSTYesJLAUSGS0.08 Fair NONE1Imported Channel 1OTHRQFLUM 0.08 UNSPUNSPUNSPunknUNSPUNSPUNSP
552002-10-03 08:28PDTYesJLAUSGS0.08 Fair NONE1Imported Channel 1OTHRQFLUM 0.08 UNSPUNSPUNSPunknUNSPUNSPUNSP
542002-08-27 11:30PDTYesJLAUSGS0.19 Fair NONE1Imported Channel 1OTHRQFLUM 0.19 UNSPUNSPUNSPunknUNSPUNSPUNSP
532002-08-08 09:16PDTYesJLAUSGS0.11 Fair NONE1Imported Channel 1OTHRQFLUM 0.11 UNSPUNSPUNSPunknUNSPUNSPUNSP
522002-07-03 08:35PDTYesJLAUSGS0.36 Fair NONE1Imported Channel 1OTHRQFLUM 0.36 UNSPUNSPUNSPunknUNSPUNSPUNSP
512002-04-04 11:40PSTYesJLAUSGS0.29 Fair NONE1Imported Channel 1OTHRQFLUM 0.29 UNSPUNSPUNSPunknUNSPUNSPUNSP
502001-11-14 11:53PSTYesJLAUSGS0.23 Fair NONE1Imported Channel 1OTHRQFLUM 0.23 UNSPUNSPUNSPunknUNSPUNSPUNSP
492001-10-02 11:20PDTYesJLAUSGS0.27 Fair NONE1Imported Channel 1OTHRQFLUM 0.27 UNSPUNSPUNSPunknUNSPUNSPUNSP
482001-09-05 07:40PDTYesJLAUSGS0.37 Poor NONE1Imported Channel 1OTHRQFLUM 0.37 UNSPUNSPUNSPunknUNSPUNSPUNSP
472001-08-01 11:40PDTYesJLAUSGS0.22 Poor NONE1Imported Channel 1OTHRQFLUM 0.22 UNSPUNSPUNSPunknUNSPUNSPUNSP
462001-07-06 07:15PDTYesJLAUSGS0.39 Fair NONE1Imported Channel 1OTHRQFLUM 0.39 UNSPUNSPUNSPunknUNSPUNSPUNSP
452001-06-05 14:41PDTYesJLAUSGS0.34 Fair NONE1Imported Channel 1OTHRQFLUM 0.34 UNSPUNSPUNSPunknUNSPUNSPUNSP
442001-05-03 14:15PDTYesJLAUSGS0.46 Fair NONE1Imported Channel 1OTHRQFLUM 0.46 UNSPUNSPUNSPunknUNSPUNSPUNSP
432001-04-03 10:00PDTYesJLAUSGS0.42 Poor NONE1Imported Channel 1OTHRQFLUM 0.42 UNSPUNSPUNSPunknUNSPUNSPUNSP
422001-03-12 11:50PSTYesJLAUSGS10.7 Fair NONE1Imported Channel 1WADEunspeunkno10.711.013.50.79UNSPUNSPUNSPunknUNSPUNSPUNSP
412001-02-07 11:30PSTYesJLAUSGS0.22 Poor NONE1Imported Channel 1WADEunspeunkno0.222.000.420.52UNSPUNSPUNSPunknUNSPUNSPUNSP
402001-01-10 11:20PSTYesKSSUSGS0.04 Poor NONE1Imported Channel 1OTHRQFLUM 0.04 UNSPUNSPUNSPunknUNSPUNSPUNSP
392000-12-06 12:20PSTYesJLAUSGS0.25 Poor NONE1Imported Channel 1WADEunspeunkno0.252.000.770.32UNSPUNSPUNSPunknUNSPUNSPUNSP
382000-11-06 14:10PSTYesJLAUSGS0.47 Poor NONE1Imported Channel 1OTHRQFLUM 0.47 UNSPUNSPUNSPunknUNSPUNSPUNSP
372000-10-05 14:00PDTYesJLAUSGS0.26 Poor NONE1Imported Channel 1WADEunspeunkno0.262.000.880.30UNSPUNSPUNSPunknUNSPUNSPUNSP
362000-09-07 11:15PDTYesJLAUSGS0.34 Poor NONE1Imported Channel 1WADEunspeunkno0.342.000.920.37UNSPUNSPUNSPunknUNSPUNSPUNSP
352000-08-03 09:15PDTYesJLAUSGS0.38 Fair NONE1Imported Channel 1WADEunspeunkno0.382.000.930.41UNSPUNSPUNSPunknUNSPUNSPUNSP
342000-07-07 09:00PDTYesJLAUSGS0.42 Fair NONE1Imported Channel 1WADEunspeunkno0.422.100.960.44UNSPUNSPUNSPunknUNSPUNSPUNSP
332000-06-08 12:15PDTYesJLAUSGS0.50 Poor NONE1Imported Channel 1OTHRQFLUM 0.50 UNSPUNSPUNSPunknUNSPUNSPUNSP
322000-05-02 15:00PDTYesJLAUSGS0.52 Fair NONE1Imported Channel 1WADEunspeunkno0.522.501.040.50UNSPUNSPUNSPunknUNSPUNSPUNSP
312000-04-04 10:00PDTYesJLAUSGS0.58 Fair NONE1Imported Channel 1WADEunspeunkno0.583.001.110.52UNSPUNSPUNSPunknUNSPUNSPUNSP
302000-03-02 12:45PSTYesJLAUSGS0.58 Fair NONE1Imported Channel 1WADEunspeunkno0.584.601.330.44UNSPUNSPUNSPunknUNSPUNSPUNSP
292000-02-02 12:45PSTYesJLAUSGS0.41 Poor NONE1Imported Channel 1WADEunspeunkno0.412.000.530.77UNSPUNSPUNSPunknUNSPUNSPUNSP
282000-01-10 12:35PSTYesJLAUSGS0.43 Fair NONE1Imported Channel 1WADEunspeunkno0.432.300.650.66UNSPUNSPUNSPunknUNSPUNSPUNSP
271999-12-01 10:30PSTYesJLAUSGS0.47 Fair NONE1Imported Channel 1WADEunspeunkno0.472.300.820.57UNSPUNSPUNSPunknUNSPUNSPUNSP
261999-11-04 13:00PSTYesJLAUSGS0.52 Fair NONE1Imported Channel 1WADEunspeunkno0.523.001.440.36UNSPUNSPUNSPunknUNSPUNSPUNSP
251999-10-08 11:40PDTYesJLAUSGS0.56 Fair NONE1Imported Channel 1WADEunspeunkno0.563.001.560.36UNSPUNSPUNSPunknUNSPUNSPUNSP
241999-09-08 14:15PDTYesJLAUSGS0.31 Poor NONE1Imported Channel 1OTHRQFLUM 0.31 UNSPUNSPUNSPunknUNSPUNSPUNSP
231999-08-11 12:00PDTYesJLAUSGS0.50 Poor NONE1Imported Channel 1WADEunspeunkno0.504.301.380.36UNSPUNSPUNSPunknUNSPUNSPUNSP
221999-07-08 11:30PDTYesJLAUSGS0.62 Poor NONE1Imported Channel 1WADEunspeunkno0.623.001.770.35UNSPUNSPUNSPunknUNSPUNSPUNSP
211999-06-14 16:40PDTYesJAUSGS0.64 Poor NONE1Imported Channel 1WADEunspeunkno0.644.102.180.29UNSPUNSPUNSPunknUNSPUNSPUNSP
201999-05-05 14:10PDTYesJLAUSGS0.67 Fair NONE1Imported Channel 1WADEunspeunkno0.673.001.570.43UNSPUNSPUNSPunknUNSPUNSPUNSP
191999-04-06 11:10PDTYesJLAUSGS0.68 Fair NONE1Imported Channel 1WADEunspeunkno0.682.901.210.56UNSPUNSPUNSPunknUNSPUNSPUNSP
181999-03-02 10:20PSTYesJLA/KSSUSGS0.72 Fair NONE1Imported Channel 1WADEunspeunkno0.722.800.950.76UNSPUNSPUNSPunknUNSPUNSPUNSP
171999-02-05 12:00PSTYesJLAUSGS0.71 Fair NONE1Imported Channel 1WADEunspeunkno0.712.801.050.68UNSPUNSPUNSPunknUNSPUNSPUNSP
161999-01-05 11:45PSTYesJLAUSGS0.66 Fair NONE1Imported Channel 1WADEunspeunkno0.662.900.840.79UNSPUNSPUNSPunknUNSPUNSPUNSP
151998-12-03 12:10PSTYesJLAUSGS0.68 Fair NONE1Imported Channel 1WADEunspeunkno0.682.901.050.65UNSPUNSPUNSPunknUNSPUNSPUNSP
141998-11-06 13:10PSTYesJLA/KSSUSGS0.84 Poor NONE1Imported Channel 1WADEunspeunkno0.84 0.00UNSPUNSPUNSPunknUNSPUNSPUNSP
131998-10-09 12:10PDTYesJLAUSGS0.86 Poor NONE1Imported Channel 1WADEunspeunkno0.865.401.030.83UNSPUNSPUNSPunknUNSPUNSPUNSP