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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 01570500 Susquehanna River at Harrisburg, PA


Dauphin County, Pennsylvania
Hydrologic Unit Code 02050305
Latitude  40°15'17", Longitude  76°53'11" NAD27
Drainage area 24,100  square miles
Gage datum 290.01 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 1890-10-01 -> 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 39,200 34,900 57,500 87,500 51,000 34,700 22,200 13,200 12,200 17,700 24,600 37,200
2 39,200 34,600 60,600 87,400 51,600 32,500 21,200 13,500 13,100 17,200 23,600 37,600
3 39,700 34,800 60,100 86,800 49,400 31,200 20,400 13,300 12,600 16,900 23,700 37,200
4 39,700 36,400 58,300 85,900 47,400 31,300 19,500 13,300 12,300 16,200 23,600 36,300
5 38,300 37,400 58,700 84,600 47,800 31,500 19,100 13,400 12,700 15,200 23,300 36,400
6 37,900 35,300 64,400 85,600 47,300 30,400 18,400 12,900 12,300 14,700 23,700 36,200
7 38,700 34,900 66,800 86,200 46,700 30,100 17,500 12,400 13,200 14,100 23,500 35,700
8 39,500 35,200 68,100 84,200 47,000 29,100 16,700 12,300 15,500 13,900 22,900 35,200
9 40,000 34,200 66,000 81,800 46,700 27,600 16,500 12,000 14,800 14,100 23,700 35,100
10 39,400 32,800 65,600 80,300 45,400 25,900 17,200 11,900 13,900 15,000 25,800 34,300
11 36,900 32,600 67,900 78,000 45,100 24,700 17,700 12,200 14,400 15,600 26,000 34,800
12 35,100 35,400 70,200 74,100 46,100 23,900 16,600 12,400 14,000 15,700 25,600 36,400
13 34,800 35,600 72,200 70,700 47,400 23,600 15,400 12,500 12,900 15,800 26,000 36,600
14 35,500 35,500 73,500 69,000 48,900 23,600 15,000 12,800 12,500 16,000 27,000 37,900
15 37,000 38,300 75,600 70,400 48,500 23,500 15,100 13,100 12,100 16,200 26,600 39,400
16 36,900 40,500 77,400 72,900 46,100 23,400 14,500 13,300 11,700 16,500 26,300 40,500
17 35,700 41,500 76,700 73,400 45,000 24,500 14,500 12,800 12,300 16,800 27,900 38,800
18 34,500 42,000 76,500 71,900 43,900 25,100 14,100 11,900 13,600 16,700 29,500 37,400
19 33,300 42,500 76,800 66,200 43,000 24,400 13,300 13,200 16,400 17,500 30,400 35,300
20 35,100 42,000 74,900 61,500 43,300 23,900 13,700 13,700 16,300 19,000 30,100 34,300
21 37,400 42,400 72,800 59,800 44,500 23,000 13,600 12,900 14,200 20,500 30,100 33,600
22 39,200 45,200 73,600 60,300 46,600 25,800 13,500 12,100 13,200 21,700 29,700 34,000
23 40,900 47,400 75,900 59,800 47,200 30,200 14,500 11,600 12,900 21,900 29,300 34,500
24 41,700 49,300 77,800 57,900 45,800 29,200 15,200 12,500 13,900 21,800 28,300 35,400
25 43,600 52,700 78,400 56,000 42,500 26,200 16,100 13,900 13,800 22,000 27,600 37,500
26 44,900 56,300 77,300 55,500 41,100 23,400 16,900 12,800 15,700 22,100 28,800 38,800
27 44,600 58,200 77,800 55,400 39,700 21,500 16,000 11,600 17,500 21,800 30,700 37,400
28 42,800 56,600 82,900 54,100 38,600 21,400 14,400 11,200 17,200 22,300 32,900 35,900
29 39,600 47,900 87,000 53,100 38,800 22,200 14,400 11,400 17,100 22,700 36,100 34,500
30 36,400   87,500 51,100 38,500 22,500 14,200 11,800 16,400 24,300 38,000 34,800
31 35,300   87,300   37,200   13,600 12,300   25,500   37,700