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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 01573560 Swatara Creek near Hershey, PA


Dauphin County, Pennsylvania
Hydrologic Unit Code 02050305
Latitude  40°17'54", Longitude  76°40'05" NAD27
Drainage area 483  square miles
Gage datum 325.94 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 1975-10-01 -> 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
1 922 862 1,090 1,420 1,090 700 662 370 447 659 813 1,120
2 997 1,010 1,240 1,450 895 731 581 436 655 538 697 1,180
3 948 1,000 1,200 1,580 921 674 505 397 569 515 707 1,040
4 910 1,160 1,160 1,590 894 711 467 485 338 500 578 991
5 860 1,110 1,530 1,440 888 760 596 514 412 471 543 1,020
6 831 908 1,550 1,310 1,020 830 568 448 537 436 580 1,010
7 782 866 1,320 1,310 1,060 773 574 570 836 377 560 954
8 905 822 1,170 1,230 965 650 599 500 1,940 447 550 897
9 1,040 719 1,160 1,160 949 606 489 465 1,730 592 655 799
10 1,060 664 1,320 1,240 843 564 433 498 648 717 611 850
11 908 743 1,480 1,240 873 746 400 439 443 647 628 1,020
12 861 832 1,480 1,200 901 751 402 624 378 596 667 1,170
13 880 787 1,320 1,270 873 793 553 726 472 456 794 1,140
14 899 739 1,420 1,240 917 729 554 737 469 474 678 1,240
15 845 834 1,520 1,340 999 575 584 469 327 529 670 1,100
16 809 866 1,300 1,700 1,080 550 506 407 337 481 722 1,050
17 766 918 1,140 1,720 1,230 559 512 355 433 483 909 1,110
18 758 917 1,150 1,290 973 607 509 362 749 524 750 1,190
19 818 892 1,140 1,100 1,020 585 417 411 915 726 660 1,090
20 1,140 921 1,180 1,050 1,130 657 363 345 492 781 687 885
21 1,180 974 1,380 968 911 793 353 442 352 800 762 1,030
22 875 995 1,800 989 779 688 380 520 408 652 754 1,010
23 843 1,040 1,630 928 786 624 639 422 504 559 935 993
24 1,140 1,350 1,530 883 788 602 988 364 512 601 819 1,120
25 1,560 1,600 1,360 929 748 569 987 305 423 570 849 1,450
26 1,330 1,460 1,270 899 718 741 857 285 457 559 768 1,250
27 1,510 1,140 1,470 929 707 752 600 258 448 570 843 1,020
28 1,320 1,070 1,520 894 637 1,010 439 393 624 777 994 964
29 1,030 1,290 1,560 884 784 1,110 402 422 640 854 1,280 932
30 953   1,370 876 901 656 406 322 534 858 1,020 867
31 938   1,320   746   364 311   809   820