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USGS Daily Statistics for the Nation

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 -> 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
1 678 592 896 1,020 769 574 393 276 352 454 493 775
2 746 638 914 1,100 643 563 375 304 458 339 464 784
3 709 696 874 1,150 659 528 388 281 322 368 533 688
4 698 746 928 1,080 696 493 319 366 247 310 431 714
5 646 663 1,160 1,050 721 484 344 295 238 291 415 833
6 685 576 1,190 1,100 696 566 335 260 306 300 395 839
7 651 704 1,100 1,100 704 489 324 277 421 259 404 824
8 669 707 999 939 662 456 392 257 729 270 428 761
9 718 572 985 938 685 398 326 260 425 321 556 717
10 739 542 991 913 677 390 342 267 269 368 456 675
11 628 632 1,130 854 663 437 294 270 252 293 408 777
12 580 696 1,220 859 754 439 294 336 227 273 437 810
13 578 672 1,120 881 715 488 305 430 294 256 556 790
14 585 742 1,080 871 686 444 323 397 266 279 458 842
15 604 747 1,140 938 700 371 313 259 262 306 466 733
16 576 702 1,000 1,050 731 354 312 230 232 285 526 710
17 558 708 997 1,110 800 334 338 297 255 314 637 733
18 543 680 986 869 657 401 308 284 371 319 542 748
19 603 718 957 769 701 423 313 337 412 422 510 653
20 766 729 1,030 764 727 442 307 215 314 438 537 597
21 759 761 1,080 714 672 487 304 242 241 402 550 789
22 751 792 1,260 708 731 720 316 272 257 328 588 722
23 655 844 1,150 690 726 756 468 263 295 395 627 665
24 801 994 1,120 654 611 454 523 389 280 416 512 694
25 972 1,060 1,050 698 598 373 469 304 305 396 595 788
26 902 1,090 997 667 659 482 363 235 397 415 628 720
27 872 938 1,070 676 590 466 299 192 434 430 568 680
28 790 949 1,070 738 554 647 246 256 435 474 704 642
29 659 769 1,040 702 660 556 272 225 352 478 813 645
30 630   922 677 637 451 299 184 410 476 718 707
31 652   975   652   240 230   441   683