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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 01554000 Susquehanna River at Sunbury, PA


Snyder County, Pennsylvania
Hydrologic Unit Code 02050301
Latitude  40°50'04", Longitude  76°49'37" NAD27
Drainage area 18,300  square miles
Gage datum 407.90 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 1937-10-01 -> 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 36,000 28,300 41,900 69,800 40,900 25,800 17,100 10,600 8,790 14,000 20,900 32,200
2 34,800 27,400 42,300 70,900 40,700 25,300 16,900 10,900 9,550 13,200 19,700 32,700
3 34,400 27,600 42,900 72,300 38,300 24,600 16,100 10,600 9,590 12,600 19,700 32,200
4 32,200 30,600 42,500 74,000 36,800 24,200 15,000 10,600 9,710 12,400 19,200 30,800
5 31,000 29,700 45,500 75,600 36,400 23,400 14,000 10,000 9,660 12,300 18,600 31,200
6 31,300 27,700 49,900 78,100 36,000 22,600 13,000 9,580 8,790 11,800 18,100 31,000
7 31,400 27,200 52,500 76,800 36,100 22,800 12,400 9,330 9,670 11,400 18,200 30,800
8 31,000 27,500 51,900 71,300 36,300 22,100 12,100 9,320 12,100 11,200 18,300 30,700
9 30,800 26,400 50,700 65,900 35,500 20,200 11,800 9,490 11,800 11,100 20,500 30,600
10 30,400 25,300 51,800 62,100 34,400 18,700 11,600 10,800 11,600 12,300 22,800 30,400
11 28,800 25,300 52,900 60,300 35,200 17,700 11,400 10,900 11,900 12,400 22,400 30,900
12 27,100 27,200 52,600 57,700 36,500 17,300 10,800 10,400 11,100 12,100 21,900 33,400
13 26,900 26,900 51,100 56,000 38,500 17,200 10,700 10,200 10,400 12,100 22,500 34,200
14 28,100 27,900 50,700 55,100 39,600 17,800 11,400 10,800 10,100 12,000 23,100 35,200
15 28,900 30,100 52,600 55,500 39,100 18,500 11,000 11,400 9,440 12,400 23,000 34,300
16 27,800 30,600 55,700 56,000 37,400 20,000 10,800 11,100 8,730 13,500 22,500 32,400
17 26,700 30,900 56,500 56,800 36,800 19,900 11,200 9,820 8,570 14,000 23,600 30,600
18 25,600 32,000 57,200 55,400 35,800 18,800 10,600 9,650 10,400 14,300 25,100 29,800
19 26,000 33,400 56,400 50,800 34,800 18,700 10,600 11,600 14,600 14,800 24,400 30,700
20 28,600 33,400 53,900 47,800 34,700 17,800 10,900 11,500 13,700 15,700 24,100 30,000
21 28,700 34,500 53,700 47,300 34,400 18,000 10,200 10,400 11,700 17,200 24,500 29,000
22 28,800 36,300 56,500 47,100 34,700 21,400 10,400 9,440 10,800 17,900 24,400 29,800
23 28,400 37,900 59,800 45,700 36,200 23,900 10,800 9,350 11,000 17,100 24,500 30,400
24 28,100 39,400 59,900 43,300 34,300 23,000 12,100 8,990 12,000 17,100 24,000 30,900
25 32,200 42,400 58,000 42,500 32,300 20,900 13,300 8,160 12,000 17,000 23,700 32,800
26 33,900 44,700 57,600 43,300 30,800 18,100 13,200 7,570 14,400 16,500 25,700 33,500
27 36,500 43,500 58,200 43,300 30,100 16,100 11,700 7,260 16,800 16,900 28,000 32,500
28 36,900 41,900 59,900 42,400 30,700 17,500 11,300 7,030 16,500 18,100 29,600 30,800
29 34,000 41,000 61,700 41,600 30,700 18,500 11,500 7,720 15,600 19,700 32,800 29,900
30 30,600   63,000 40,200 29,800 18,000 10,800 8,440 14,800 21,600 32,900 31,800
31 28,600   66,300   27,500   10,200 8,440   21,900   35,400