Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

Click to hideNews Bulletins

USGS Daily Statistics for Texas

Click to hide state-specific text

Explore Real-time Water Data Using New Products from USGS TXWSC

View over 750 USGS real-time stream, lake, reservoir, precipitation, and groundwater stations in context with current weather and hazard conditions on both desktop and mobile devices.

Click to go to the Texas Water Dashboard Click to go to the WATER On-the-go app

Follow @USGS_TexasFlood and @USGS_TexasRain on Twitter to get current water level and precipitation data during flooding or severe rainfall events.


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 08172000 San Marcos Rv at Luling, TX


Caldwell County, Texas
Hydrologic Unit Code 12100203
Latitude  29°39'58", Longitude  97°39'02" NAD27
Drainage area 838  square miles
Contributing drainage area 838  square miles
Gage datum 322.05 feet above NGVD29
Output formats
HTML table of all data
Tab-separated data
Reselect output format

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 1983-10-01 -> 2019-09-30)

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
1 420 395 417 439 339 866 751 298 263 220 829 383
2 413 407 414 389 332 670 719 294 256 217 483 387
3 506 452 437 388 354 901 913 293 240 236 432 403
4 433 721 675 387 491 1,160 878 288 244 250 617 518
5 408 764 672 529 460 782 742 278 239 226 684 426
6 397 551 532 523 465 567 938 270 263 248 470 377
7 382 489 472 435 363 994 581 266 325 232 423 357
8 381 474 443 544 348 792 503 265 283 226 372 498
9 398 441 425 416 474 762 434 260 364 452 368 401
10 429 451 434 387 486 1,030 407 256 326 270 345 401
11 397 443 423 385 461 896 386 250 274 262 326 371
12 380 511 880 501 388 816 391 247 295 266 318 404
13 393 416 727 399 354 730 365 244 278 341 322 379
14 423 393 549 428 428 647 345 239 249 307 354 356
15 414 390 449 401 436 589 367 236 258 285 388 404
16 449 385 463 376 434 501 364 238 254 276 867 503
17 438 379 539 384 491 462 393 256 318 396 703 399
18 628 425 460 505 675 512 455 305 255 2,750 940 375
19 480 384 428 412 505 485 379 257 258 808 532 393
20 408 473 500 379 635 428 377 241 271 665 476 453
21 388 590 468 375 448 440 732 261 266 422 466 810
22 391 547 427 364 538 631 688 244 242 430 1,260 1,360
23 388 479 416 340 517 1,070 437 256 245 498 1,200 1,120
24 371 538 387 455 1,140 605 441 251 242 663 694 652
25 748 589 374 429 863 498 484 245 246 651 627 501
26 500 590 367 390 796 470 440 268 237 494 531 489
27 584 488 443 373 607 438 368 659 281 416 512 503
28 490 446 479 358 510 423 349 469 245 376 475 527
29 427 398 580 332 566 446 339 270 328 349 415 497
30 426   427 328 723 595 349 249 240 398 395 444
31 406   530   920   318 297   1,560   446