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USGS Surface-Water Daily Statistics for Puerto Rico

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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 50059050 RIO GRANDE DE LOIZA BLW LOIZA DAMSITE, PR


Trujillo Alto Municipio, Puerto Rico
Hydrologic Unit Code 21010005
Latitude  18°20'32.17", Longitude  66°00'21.51" NAD27
Drainage area 209  square miles
Gage datum 49.2 feet above NGVD29
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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 1986-10-01 -> 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
1 175 34 32 55 208 200 251 236 211 222 445 318
2 89 38 32 62 240 222 461 161 153 238 361 562
3 98 75 19 9.5 92 244 277 1,040 485 505 272 327
4 87 53 41 36 169 356 161 333 311 322 247 295
5 454 108 68 23 275 151 188 178 874 327 474 225
6 338 216 55 86 194 154 241 175 547 286 510 638
7 205 111 147 39 178 176 202 131 465 567 982 824
8 138 53 76 268 203 126 267 137 531 330 1,270 1,300
9 122 68 65 44 188 69 258 138 209 235 639 414
10 131 35 112 33 200 208 547 156 3,100 785 709 289
11 132 57 16 170 130 93 428 204 386 729 611 501
12 96 44 24 82 175 202 158 73 273 521 1,220 432
13 119 68 47 101 463 128 219 89 580 454 1,450 146
14 236 48 10 187 250 123 342 182 208 1,190 819 154
15 325 27 21 69 135 190 234 202 1,220 418 530 152
16 141 36 37 54 111 205 235 388 768 803 638 242
17 123 114 9.2 598 587 259 238 206 626 330 967 164
18 90 57 49 291 638 85 309 188 2,100 417 734 144
19 102 21 14 100 289 461 481 263 1,550 255 364 119
20 205 38 66 185 934 314 485 271 2,320 321 279 210
21 107 39 40 203 505 462 537 297 1,530 574 372 116
22 70 39 124 145 249 517 454 1,250 3,160 944 433 149
23 99 69 143 173 525 201 319 2,550 790 550 334 159
24 38 23 79 208 304 339 183 1,500 445 313 775 132
25 121 41 56 71 241 114 151 654 334 470 276 611
26 64 54 34 107 250 162 106 381 223 861 292 152
27 49 52 106 106 203 274 99 244 295 918 1,600 149
28 68 26 81 89 216 81 192 233 239 975 448 95
29 60 114 101 309 139 86 155 235 204 595 250 317
30 71   154 104 379 131 797 292 280 433 268 135
31 58   99   181   260 308   288   178