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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
1 320 295 531 351 226 164 133 110 103 107 124 185
2 284 303 577 365 214 167 135 108 101 112 124 188
3 253 322 522 315 217 168 134 107 101 114 127 187
4 285 342 502 287 219 170 133 108 99 112 128 194
5 300 347 495 303 212 171 129 107 99 111 130 199
6 331 377 549 303 220 170 127 106 99 121 128 189
7 344 425 523 290 231 170 126 105 100 109 130 219
8 399 467 464 280 221 168 127 105 103 110 135 213
9 408 453 436 278 222 169 126 105 103 109 133 205
10 450 424 414 279 220 168 125 106 99 113 135 208
11 532 354 435 282 202 165 123 105 100 116 142 210
12 487 334 409 270 197 164 122 105 100 117 153 204
13 404 441 365 257 233 153 122 104 100 117 162 208
14 495 431 363 253 201 149 121 104 102 114 152 206
15 469 468 419 262 179 150 121 102 100 113 145 210
16 475 465 463 257 172 149 121 101 98 116 140 218
17 452 444 371 269 170 147 120 108 101 120 140 242
18 409 389 309 254 171 147 119 108 102 120 146 244
19 348 389 293 243 170 146 118 107 103 121 147 260
20 399 486 286 240 170 144 119 107 101 133 156 303
21 429 584 325 238 169 141 119 110 101 147 171 295
22 433 635 360 245 169 139 118 110 101 145 157 300
23 439 591 392 239 173 139 115 106 101 146 161 283
24 450 561 315 232 169 139 116 104 103 148 164 302
25 488 556 290 217 164 138 116 104 103 149 164 296
26 546 602 302 222 163 137 116 104 104 125 170 273
27 405 576 351 222 165 135 114 103 107 151 174 235
28 347 543 376 227 172 133 113 102 103 153 175 251
29 351 294 338 213 170 131 113 101 102 151 175 314
30 307   305 220 166 131 112 103 105 137 175 350
31 299   308   165   113 103   125   340