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USGS Surface-Water Daily Statistics for California

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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 11078000 SANTA ANA R A SANTA ANA CA


Orange County, California
Hydrologic Unit Code 18070203
Latitude  33°45'04", Longitude 117°54'27" NAD27
Drainage area 1,700  square miles
Gage datum 66.18 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 1939-10-01 -> 2024-09-30)

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
1 124 89 488 130 27 8.9 0.93 0.1 0.02 27 2.9 10
2 106 104 522 144 25 9.3 1.1 0.1 0.02 2.8 1.7 10
3 50 127 407 115 34 10 1.4 0.03 0.06 5.1 1.3 12
4 144 124 413 88 32 17 1.4 0.01 0.02 4.9 1.8 27
5 125 94 410 85 37 23 1.5 0.04 0.18 6.4 1.5 24
6 160 117 393 114 45 18 1.8 0.06 0.1 13 1.3 66
7 215 158 305 95 47 17 1.7 0.04 0.07 2.3 3.7 65
8 212 167 289 76 42 16 1.6 0.02 0.1 3.6 14 31
9 254 304 213 66 41 14 1.4 0.02 0.02 3.8 9.7 18
10 303 295 212 64 42 14 1.2 0.02 4.3 3.6 3.8 15
11 391 196 245 71 33 12 1.2 0.03 1.7 3.2 13 19
12 371 233 215 68 22 11 1.1 0.22 0.03 3.1 11 26
13 217 312 182 59 62 7.2 1 0.01 0.02 3.7 39 16
14 283 389 156 68 41 1.3 0.99 0.01 0.06 1.1 12 14
15 278 300 266 73 22 0.46 1.1 0.05 1.9 0.11 3.5 31
16 332 280 271 56 13 1.5 0.7 0.03 0.03 0.03 3.6 57
17 295 287 206 65 11 2.4 0.16 6.1 0.03 12 2.1 55
18 248 225 95 57 12 0.54 0.05 6.9 0.02 2.6 13 59
19 186 211 76 34 9.6 0.41 0.38 8.3 0.45 5.6 5.7 72
20 175 275 78 37 7.4 0.33 0.18 10 0.12 38 8.6 123
21 225 350 115 34 5.2 0.29 0.06 8.3 0.36 22 25 126
22 261 404 146 41 12 0.29 0.01 5.5 1.1 21 16 159
23 260 433 174 40 5.5 0.31 0.25 0.16 0.17 22 3.8 68
24 243 456 124 38 4.9 0.27 0.08 0.06 0.79 19 27 91
25 294 550 98 30 4.7 0.21 0.17 0.05 10 20 16 82
26 324 580 97 17 5 0.25 0.26 0.06 0.31 7.7 21 71
27 219 472 147 17 6 0.6 0.33 0.08 0.33 39 12 42
28 132 416 172 37 12 0.7 0.35 0.08 2.6 20 17 58
29 176 186 132 27 15 0.68 0.22 0.05 2.6 20 32 87
30 152   89 24 10 0.71 0.17 0.02 6.9 19 25 152
31 128   78   9.9   0.14 0.02   5.1   135