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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 11092450 LOS ANGELES R A SEPULVEDA DAM CA


Los Angeles County, California
Hydrologic Unit Code 18070105
Latitude  34°09'42", Longitude 118°27'57" NAD27
Drainage area 158  square miles
Gage datum 655.13 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1942-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 55 81 231 113 32 30 28 29 30 30 34 40
2 109 123 171 48 33 29 28 30 30 30 31 84
3 134 110 85 80 65 28 28 30 30 30 31 63
4 128 167 273 83 41 28 28 30 30 30 32 94
5 229 295 112 70 31 28 28 29 36 38 39 70
6 161 266 151 82 39 28 28 29 32 33 63 98
7 207 111 106 64 34 28 27 33 28 31 105 53
8 83 106 165 69 64 28 28 29 29 29 75 36
9 324 233 46 80 49 28 28 29 29 28 47 37
10 226 261 99 45 31 29 28 29 48 28 33 37
11 89 278 76 49 33 29 30 31 31 32 40 67
12 96 264 88 56 33 29 28 29 28 29 43 115
13 63 123 88 70 30 29 29 28 28 41 34 43
14 143 94 78 77 33 30 29 28 29 54 57 78
15 137 53 233 50 31 30 29 29 42 31 60 96
16 212 108 122 35 35 31 29 28 29 30 74 94
17 107 179 77 35 32 29 29 61 29 54 103 55
18 200 149 45 40 35 29 36 30 29 41 47 125
19 131 221 43 34 33 28 30 28 30 45 52 129
20 186 139 219 44 30 28 29 101 29 69 98 120
21 151 209 165 37 29 28 29 50 31 31 128 128
22 215 204 148 42 43 28 29 30 45 29 134 122
23 131 169 68 33 29 28 30 30 29 28 45 125
24 178 204 42 35 29 28 29 31 28 33 52 115
25 255 263 68 35 28 28 30 30 29 43 45 91
26 167 113 43 48 28 29 29 30 29 58 60 114
27 129 141 91 42 29 28 29 29 29 48 36 99
28 70 238 117 49 29 28 29 29 32 33 68 230
29 57 50 59 32 29 28 29 29 31 30 147 210
30 80   94 36 29 28 28 29 30 35 70 173
31 93   79   30   29 29   29   103