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USGS 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 50144000 RIO GRANDE DE ANASCO NR SAN SEBASTIAN, PR


Anasco Municipio, Puerto Rico
Hydrologic Unit Code 21010003
Latitude  18°17'03.00", Longitude  67°03'03.46" NAD27
Drainage area 134  square miles
Gage datum 164.0 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 1962-10-01 -> 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
1 170 148 135 144 320 358 238 345 571 837 619 351
2 171 122 120 143 365 346 246 324 594 692 599 342
3 163 121 113 145 396 332 276 336 629 618 670 317
4 158 121 108 148 335 322 244 303 547 561 606 304
5 154 129 111 146 356 326 273 390 528 597 544 302
6 186 124 126 174 380 295 256 327 601 683 574 301
7 160 131 107 146 491 262 270 359 694 805 549 276
8 165 120 114 146 417 310 287 342 599 901 628 273
9 155 121 106 190 444 315 260 350 518 795 690 267
10 153 135 111 183 477 374 258 366 817 779 565 296
11 155 121 130 169 484 510 277 406 632 909 519 375
12 151 116 110 172 365 392 323 329 600 797 546 309
13 150 110 108 175 425 328 322 314 780 696 675 262
14 166 111 133 186 426 314 322 542 590 733 642 269
15 161 122 121 200 334 324 295 375 591 797 557 244
16 169 115 106 164 403 349 286 427 1,180 704 563 243
17 150 115 96 164 510 351 288 525 767 795 541 253
18 150 110 99 177 714 356 321 398 840 824 565 240
19 144 103 124 180 584 306 373 475 975 717 509 209
20 140 106 130 200 422 293 359 386 2,160 763 503 219
21 149 117 120 220 494 315 326 378 1,740 771 485 229
22 161 134 99 199 386 301 307 403 1,990 690 448 221
23 150 109 106 191 413 299 349 523 850 746 398 203
24 150 113 114 240 406 287 305 572 815 717 391 198
25 134 113 125 232 393 333 276 587 838 743 400 198
26 133 108 123 321 353 321 281 447 718 763 410 203
27 131 109 118 326 506 304 299 508 806 755 427 194
28 126 113 133 281 460 331 307 453 666 701 399 185
29 143 97 153 309 423 321 315 411 715 733 347 184
30 130   152 312 396 292 381 407 750 734 336 177
31 139   159   343   376 669   681   170