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USGS Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 01573000 Swatara Creek at Harper Tavern, PA


Lebanon County, Pennsylvania
Hydrologic Unit Code 02050305
Latitude  40°24'09", Longitude  76°34'39" NAD27
Drainage area 337  square miles
Gage datum 356.03 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 1918-10-01 -> 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
1 680 596 900 1,030 775 552 393 276 355 458 497 781
2 749 643 919 1,100 648 553 375 304 462 341 468 791
3 712 701 880 1,150 664 521 388 281 324 371 537 693
4 702 752 934 1,090 695 488 319 366 248 312 435 720
5 650 668 1,160 1,060 717 481 344 295 239 293 418 840
6 690 580 1,180 1,100 694 565 335 260 309 302 399 846
7 655 709 1,100 1,100 697 488 324 277 424 261 407 831
8 674 711 999 946 660 454 392 257 735 272 431 767
9 723 575 988 944 672 396 326 260 429 324 561 723
10 744 545 995 920 662 380 342 267 271 371 460 680
11 633 636 1,140 859 656 431 294 270 253 296 412 779
12 584 701 1,220 865 751 437 294 336 228 275 440 801
13 582 675 1,120 886 713 487 305 430 296 258 561 791
14 589 745 1,090 877 661 444 323 397 268 281 462 846
15 609 751 1,150 944 682 369 313 259 264 309 470 737
16 580 702 1,010 1,060 717 351 312 230 233 287 530 714
17 562 698 1,000 1,120 781 330 338 297 257 316 642 736
18 547 678 989 875 648 397 308 284 374 321 547 751
19 608 720 962 775 697 417 313 337 415 425 514 655
20 772 733 1,040 769 725 440 307 215 316 441 541 599
21 765 765 1,090 719 671 487 304 242 243 405 554 794
22 757 797 1,260 713 728 722 316 273 259 331 593 726
23 660 849 1,160 695 723 759 468 264 296 398 632 670
24 807 1,000 1,120 658 609 455 523 391 281 420 517 698
25 980 1,060 1,060 703 597 373 469 306 306 399 600 793
26 909 1,100 1,000 671 660 484 363 236 400 418 633 725
27 879 943 1,070 679 591 467 299 193 436 433 573 685
28 796 954 1,080 743 554 644 246 258 438 478 710 646
29 664 769 1,050 707 658 556 272 227 354 482 818 647
30 635   928 682 637 451 299 185 413 480 723 709
31 657   982   600   240 232   445   686