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USGS Surface-Water Daily Statistics for Maryland

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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 01578310 SUSQUEHANNA RIVER AT CONOWINGO, MD


Harford County, Maryland
Hydrologic Unit Code 02050306
Latitude  39°39'28.4", Longitude  76°10'28.0" NAD83
Drainage area 27,100  square miles
Gage datum 4.16 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 1967-10-01 -> 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 39,600 42,900 59,600 84,700 55,500 38,400 30,100 17,300 14,000 26,600 33,700 52,800
2 48,500 42,600 58,000 86,900 56,900 37,800 29,300 17,800 17,300 24,300 33,600 53,700
3 49,700 43,700 59,400 92,700 56,200 36,000 27,700 19,400 17,600 23,200 32,100 55,700
4 49,800 49,100 61,800 95,900 51,700 34,300 22,400 19,500 15,900 22,100 29,400 54,500
5 48,300 54,300 61,500 93,800 52,400 33,900 24,700 19,100 15,700 21,200 28,900 51,100
6 44,300 50,500 70,900 93,300 51,500 33,800 23,600 16,800 16,500 20,100 29,500 49,600
7 45,900 45,700 71,300 93,200 53,800 33,000 23,900 16,800 17,700 20,100 27,200 48,200
8 44,800 44,600 67,900 89,700 53,700 33,600 22,400 15,900 26,900 20,800 27,600 49,400
9 44,200 44,400 62,900 81,500 50,600 33,200 21,800 15,100 28,500 20,500 30,200 47,500
10 46,900 42,700 62,500 78,500 47,500 30,300 20,600 14,100 25,700 21,600 33,000 46,800
11 43,200 38,900 65,500 78,200 46,900 28,600 19,000 14,700 24,800 22,200 34,900 46,500
12 40,400 40,500 67,700 79,000 50,400 28,100 18,400 15,200 23,200 21,400 35,700 48,400
13 39,100 41,800 65,100 73,900 53,200 27,800 18,800 16,500 20,900 19,900 37,200 50,200
14 41,200 41,900 67,200 71,000 53,700 26,900 19,100 18,000 19,200 20,800 37,200 54,100
15 44,100 43,700 71,100 70,600 54,800 27,500 20,500 17,800 18,600 20,000 37,200 54,100
16 44,300 46,800 74,500 73,600 56,400 27,000 19,100 18,000 18,200 20,200 36,900 51,700
17 42,400 46,800 76,000 78,100 56,700 28,300 19,300 17,500 16,700 20,200 37,900 50,500
18 41,000 45,600 73,200 80,800 54,800 30,400 19,400 16,700 18,400 20,500 38,900 49,000
19 40,000 48,900 70,200 75,900 54,100 30,000 17,800 15,700 25,400 23,600 40,500 47,500
20 46,900 51,400 69,800 68,200 52,500 28,300 17,300 18,300 27,400 25,900 40,200 45,500
21 51,000 53,500 72,000 64,400 50,700 28,300 18,200 18,000 22,400 27,900 40,900 44,300
22 46,800 53,800 77,900 63,100 48,200 37,300 17,900 17,300 20,200 29,600 38,200 46,400
23 42,500 57,100 80,600 61,400 45,500 48,600 18,900 16,800 18,300 31,100 38,100 48,800
24 41,800 60,500 83,700 58,400 45,200 48,900 19,500 15,700 21,600 29,500 36,600 48,500
25 48,200 65,700 84,700 57,200 42,300 44,000 21,600 15,500 21,900 29,500 36,200 44,800
26 52,200 70,500 80,100 58,100 40,500 37,900 23,600 14,000 26,300 28,600 36,800 55,000
27 53,300 68,700 78,500 56,400 38,200 32,100 22,400 14,100 31,600 27,800 36,900 56,000
28 55,900 62,500 79,400 58,200 38,100 29,400 20,100 13,000 31,400 28,500 40,700 52,100
29 52,200 65,400 81,800 57,800 37,800 31,900 19,200 12,900 30,900 30,700 48,100 50,100
30 47,700   85,500 55,500 38,000 31,400 19,400 12,900 28,400 33,700 50,500 48,300
31 44,200   84,500   38,900   18,000 13,300   34,100   44,900