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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 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 -> 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
1 322 295 532 343 223 161 133 110 104 108 124 185
2 285 301 578 359 212 164 135 108 101 113 124 188
3 253 321 523 311 215 165 135 108 101 114 127 188
4 283 334 500 283 217 167 133 109 99 112 129 195
5 301 287 491 300 210 168 130 108 100 112 130 200
6 333 302 546 301 218 168 128 107 100 122 128 189
7 345 343 520 288 229 168 126 106 101 110 130 220
8 401 386 460 278 219 165 127 105 103 110 135 214
9 411 439 432 276 220 167 126 105 103 110 133 205
10 453 422 409 276 218 167 125 107 100 114 135 209
11 536 352 431 279 200 165 123 105 100 116 142 210
12 491 328 408 267 195 165 123 105 100 117 154 205
13 407 435 365 254 231 153 122 104 101 118 163 209
14 499 424 364 249 198 150 121 104 102 114 152 207
15 473 464 420 260 176 151 121 102 100 113 145 211
16 479 464 465 254 170 149 121 102 99 117 140 219
17 455 443 371 266 169 147 120 109 101 120 139 243
18 412 388 308 251 169 147 119 108 102 121 145 245
19 350 388 291 240 169 146 118 108 103 122 146 261
20 402 463 284 238 168 144 119 108 101 134 154 305
21 432 530 324 236 166 141 119 110 101 148 171 296
22 436 595 359 243 165 139 118 110 101 146 158 300
23 439 589 391 236 170 139 115 107 101 147 162 282
24 447 561 314 229 166 140 116 105 103 149 165 301
25 485 556 288 215 161 139 116 105 103 150 164 295
26 546 605 300 219 160 138 116 104 104 126 170 272
27 404 580 350 220 162 135 114 104 107 152 175 233
28 345 547 373 225 169 133 113 103 103 154 176 252
29 348 293 331 210 167 132 114 102 103 152 175 316
30 302   290 217 164 131 112 103 106 138 175 352
31 297   295   162   113 103   126   341