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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 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
1 171 33 31 53 223 200 251 236 211 222 440 310
2 87 37 31 60 253 222 461 161 153 238 356 547
3 95 73 18 9.3 124 244 277 1,040 485 505 270 318
4 85 51 40 35 187 356 161 333 311 322 240 287
5 442 105 66 22 270 151 188 178 874 327 461 219
6 329 272 54 84 203 154 241 175 547 286 503 621
7 199 129 143 38 214 176 202 131 465 567 963 801
8 135 53 74 270 255 126 267 137 531 330 1,240 1,270
9 118 72 63 60 220 69 258 138 209 235 645 403
10 128 37 109 35 215 208 547 156 3,100 785 697 281
11 129 55 15 166 127 93 428 204 386 729 602 488
12 93 43 24 85 181 202 158 73 273 521 1,200 420
13 116 66 46 112 451 128 219 89 580 454 1,420 143
14 229 47 10 183 243 123 342 182 208 1,190 803 150
15 316 26 21 77 135 190 234 202 1,220 418 518 153
16 137 35 36 102 111 205 235 388 768 803 628 241
17 120 111 9 588 587 259 238 206 626 321 941 178
18 88 55 47 290 638 85 309 188 2,100 406 714 145
19 99 20 13 137 289 461 481 263 1,550 248 356 116
20 199 37 65 194 934 314 485 271 2,320 326 279 204
21 104 38 39 211 505 462 537 297 1,530 571 362 113
22 68 38 121 220 249 517 454 1,250 3,160 950 421 151
23 96 67 139 195 525 201 319 2,550 790 567 325 161
24 37 22 77 223 304 339 183 1,500 445 322 754 133
25 117 40 63 81 241 114 151 654 334 483 269 595
26 62 52 55 105 250 162 106 381 223 860 284 148
27 47 51 103 107 203 274 99 244 295 897 1,550 145
28 67 27 79 93 216 81 192 233 239 967 436 93
29 59 102 99 313 139 86 155 235 204 618 243 309
30 70   150 122 379 131 797 292 280 434 261 132
31 56   96   181   260 308   286   173