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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 11046325 SAN MATEO C A SAN MATEO RD NR SAN ONOFRE CA
San Diego County, California
Hydrologic Unit Code 18070301
Latitude  33°25'09.60", Longitude 117°32'13.40" NAD83
Drainage area 92.5  square miles
Gage datum 133.11 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
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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 
132026-01-07 12:11:30PSTYesZBARRYUSGS0.00 UnknownClearNONE
122025-11-15 10:59PSTYesZBARRYUSGS0.00 UnspecifiedDebrisLightNONE
112025-09-02 15:18:30PDTYesZBARRYUSGS0.00 Unknown NONE
102025-06-02 12:49PDTYesZBARRYUSGS0.00 UnspecifiedClearNONE
92025-05-05 12:03PDTYesZBARRYUSGS0.00 UnspecifiedClearNONE
82025-04-02 12:37PDTYesZBARRYUSGS0.00 UnspecifiedClearNONE
62025-03-14 15:35:12PDTYesZBARRYUSGS13.06.53 PoorDebrisLightNONE
72025-03-13 18:35:48PDTYesZBARRY/JVCLAUSGS1467.10 PoorDebrisLightNONE
42025-02-14 10:11PSTYesZBARRYUSGS0.00 UnspecifiedClearNONE
52025-02-14 06:15:30PSTYesZBARRYUSGS0.00 Unknown NONE
32025-01-28 15:53PSTYesZBARRYUSGS0.00 UnspecifiedDebrisModerateNONE
22024-12-16 13:24:30PSTYesZBARRYUSGS0.00 UnspecifiedClearNONE
12024-11-19 13:00PSTYesSPEPIN/ZBARRUSGS0.00 Unspecified NONE