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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 11074000 SANTA ANA R BL PRADO DAM CA


Riverside County, California
Hydrologic Unit Code 18070203
Latitude  33°53'00", Longitude 117°38'40" NAD27
Drainage area 2,258  square miles
Contributing drainage area 1,490  square miles
Gage datum 451.58 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 1940-10-01 -> 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
1 318 293 529 351 224 163 132 110 103 107 124 184
2 282 301 574 365 213 166 134 108 101 112 124 187
3 252 320 522 315 217 167 133 107 101 114 127 187
4 283 340 504 287 218 170 132 108 99 112 128 194
5 298 345 495 303 213 170 129 107 99 111 130 198
6 329 374 548 303 221 170 127 106 99 121 128 188
7 341 424 524 290 232 169 125 105 100 109 130 218
8 396 467 465 281 223 167 126 105 103 110 135 212
9 405 453 438 279 222 168 125 105 103 109 133 204
10 446 424 416 280 219 167 125 106 99 113 134 207
11 527 353 437 283 202 164 123 105 100 116 142 208
12 483 332 410 271 196 164 122 105 100 117 153 203
13 400 439 366 258 231 152 122 104 100 117 162 207
14 491 430 366 254 200 149 121 104 102 114 152 205
15 465 466 421 263 178 150 121 102 100 113 145 209
16 471 462 465 258 171 148 121 101 98 116 140 217
17 448 441 374 270 170 146 120 108 101 120 140 240
18 406 389 314 255 170 146 119 108 102 120 146 242
19 345 391 298 244 170 145 118 107 103 121 146 258
20 396 488 289 241 170 143 119 107 101 133 155 301
21 425 584 325 239 169 140 119 110 101 147 171 293
22 430 635 359 246 168 138 118 110 101 145 157 298
23 435 591 391 239 173 138 115 106 101 146 161 281
24 446 562 315 231 168 139 116 104 103 148 164 300
25 483 557 289 216 163 138 116 104 103 149 163 293
26 543 602 302 221 162 137 116 104 104 125 169 271
27 404 575 350 223 165 134 114 103 107 151 174 234
28 346 541 375 226 171 132 113 102 103 153 175 249
29 349 294 337 212 169 131 113 101 102 151 174 312
30 305   305 219 166 130 112 103 105 137 174 347
31 298   309   164   113 103   125   337