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USGS Surface-Water 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 -> 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 46,400 40,300 59,700 89,200 55,900 37,200 23,700 14,200 12,400 19,800 27,900 43,500
2 46,400 39,600 59,700 93,100 55,700 35,800 22,500 14,800 14,200 18,700 26,900 45,100
3 46,200 39,300 59,900 94,800 53,600 34,900 22,000 15,200 14,400 17,900 26,700 45,000
4 46,400 41,900 59,600 96,500 51,300 33,600 21,000 15,400 13,500 17,300 25,900 42,500
5 43,600 43,500 61,000 97,000 50,400 32,800 20,100 15,200 14,100 17,000 25,300 42,300
6 42,600 41,100 68,000 98,700 51,000 32,100 19,500 14,100 14,000 16,500 25,200 41,900
7 42,700 39,100 72,900 99,700 51,500 31,400 18,300 13,600 14,800 16,000 25,300 41,300
8 43,200 39,600 73,700 95,400 52,000 31,300 17,800 13,200 18,800 15,700 25,100 41,600
9 43,800 38,600 70,000 89,800 52,000 29,600 17,400 13,000 18,500 15,600 26,700 41,400
10 44,200 36,900 68,800 84,700 50,900 27,200 17,500 12,900 16,600 17,000 29,600 40,700
11 43,200 35,400 72,100 81,300 50,100 25,500 18,400 12,700 16,800 17,600 30,500 40,500
12 41,500 36,900 74,300 78,900 51,500 24,800 17,400 13,200 16,600 17,700 29,600 42,900
13 38,900 38,200 73,900 76,800 53,000 24,700 16,300 13,900 15,100 16,700 29,700 44,200
14 38,600 39,500 73,200 76,900 54,000 25,300 16,000 14,600 14,700 16,900 31,300 45,900
15 39,200 42,900 73,800 76,300 54,200 25,400 16,500 14,900 14,300 17,100 31,800 46,100
16 39,200 44,500 76,200 77,000 52,800 25,200 16,000 14,800 13,500 17,100 31,400 44,300
17 38,200 43,700 77,500 78,200 52,300 26,400 16,000 14,200 14,100 18,300 31,200 42,900
18 37,200 43,900 79,300 77,800 50,700 26,200 16,700 13,400 16,200 18,900 32,600 41,100
19 36,600 45,200 82,200 72,500 49,500 25,500 15,700 14,100 20,000 19,900 32,500 40,700
20 40,100 46,400 81,700 67,700 48,900 25,600 15,500 15,500 20,600 20,700 31,800 40,500
21 41,400 47,700 78,700 65,500 47,300 25,000 15,700 14,700 17,500 21,800 32,500 40,100
22 40,300 50,600 80,000 64,300 46,500 29,300 15,300 14,100 15,700 22,500 33,300 40,400
23 40,600 53,000 83,000 63,300 47,600 36,700 15,600 13,300 15,000 22,800 34,100 40,400
24 41,700 55,300 84,700 60,700 48,300 35,900 16,700 14,400 16,600 22,400 33,300 41,000
25 45,900 58,200 82,800 58,000 45,300 31,900 18,100 15,300 16,700 22,300 32,500 42,300
26 49,900 61,600 79,800 57,300 42,900 28,100 19,100 13,600 19,300 22,100 33,900 44,500
27 51,600 62,600 78,700 58,700 41,800 24,500 17,800 12,200 21,800 21,700 35,200 43,900
28 53,400 59,900 80,000 60,000 41,300 24,000 16,000 11,500 22,000 22,500 36,700 42,400
29 50,100 55,600 82,000 58,600 42,600 25,400 15,900 11,300 21,800 24,500 40,300 41,000
30 45,800   83,400 56,400 41,400 24,600 15,600 11,800 20,800 26,700 43,600 41,000
31 42,300   85,100   39,700   14,800 11,900   28,400   44,700