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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 01576000 Susquehanna River at Marietta, PA


Lancaster County, Pennsylvania
Hydrologic Unit Code 02050306
Latitude  40°03'16", Longitude  76°31'52" NAD27
Drainage area 25,990  square miles
Gage datum 200.56 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 1931-10-01 -> 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 46,400 40,300 59,700 89,200 55,600 37,100 23,600 14,200 12,500 19,700 27,700 43,300
2 46,400 39,600 59,700 93,100 55,400 35,800 22,400 14,700 14,300 18,700 26,700 44,900
3 46,200 39,300 59,900 94,800 53,300 34,800 22,000 15,100 14,400 17,900 26,500 44,800
4 46,400 41,900 59,600 96,500 51,000 33,400 20,900 15,400 13,500 17,200 25,700 42,300
5 43,600 43,500 61,000 97,000 50,200 32,700 20,000 15,200 14,100 16,900 25,100 42,000
6 42,600 41,100 68,000 98,700 50,800 32,000 19,400 14,200 14,000 16,400 25,000 41,600
7 42,700 39,100 72,900 99,700 51,300 31,300 18,200 13,700 14,800 16,000 25,100 41,100
8 43,200 39,600 73,700 95,400 51,700 31,200 17,700 13,300 18,700 15,600 24,900 41,400
9 43,800 38,600 70,000 89,800 51,800 29,400 17,300 13,300 18,400 15,500 26,500 41,200
10 44,200 36,900 68,800 84,700 50,700 27,100 17,400 14,200 16,500 16,900 29,400 40,400
11 43,200 35,400 72,100 81,300 50,100 25,400 18,300 14,900 16,800 17,500 30,300 40,200
12 41,500 36,900 74,300 78,900 51,600 24,700 17,300 14,800 16,500 17,600 29,400 42,900
13 38,900 38,200 73,900 76,800 53,200 24,600 16,300 14,900 15,000 16,600 29,400 44,200
14 38,600 39,500 73,200 76,900 54,100 25,200 16,000 15,300 14,700 16,800 31,100 45,900
15 39,200 42,900 73,800 76,300 54,300 25,300 16,400 15,400 14,300 17,000 31,600 46,100
16 39,200 44,500 76,200 77,000 53,100 25,100 15,900 15,100 13,500 17,000 31,100 44,300
17 38,200 43,700 77,500 78,500 52,500 26,200 15,900 14,400 14,100 18,200 30,900 42,900
18 37,200 43,900 79,300 78,000 50,800 26,100 16,600 13,600 16,100 18,800 32,300 41,100
19 36,600 45,200 82,200 72,700 49,500 25,400 15,600 14,300 19,900 19,800 32,200 40,700
20 40,100 46,400 81,700 67,800 48,900 25,500 15,400 15,800 20,500 20,500 31,500 40,500
21 41,400 47,700 78,700 65,600 47,300 24,800 15,600 15,000 17,300 21,700 32,300 40,100
22 40,300 50,600 80,000 64,300 46,500 29,100 15,200 14,300 15,600 22,400 33,000 40,400
23 40,600 53,000 83,000 63,300 47,500 36,400 15,500 13,500 14,900 22,600 33,800 40,400
24 41,700 55,300 84,700 60,600 48,200 35,600 16,600 14,500 16,500 22,200 33,100 41,000
25 45,900 58,200 82,800 57,900 45,200 31,700 18,000 15,400 16,700 22,100 32,300 42,300
26 49,900 61,600 79,800 57,200 42,800 27,900 19,000 13,600 19,200 21,900 33,700 44,500
27 51,600 62,600 78,700 58,500 41,700 24,400 17,800 12,300 21,600 21,500 34,900 43,900
28 53,400 59,900 80,000 59,800 41,200 23,900 16,000 11,600 21,800 22,400 36,400 42,400
29 50,100 55,600 82,000 58,400 42,400 25,300 15,900 11,400 21,700 24,300 40,100 41,000
30 45,800   83,400 56,200 41,200 24,500 15,600 11,800 20,700 26,400 43,400 41,000
31 42,300   85,100   39,600   14,800 12,000   28,200   44,700