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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 40,300 44,800 59,900 83,900 55,500 38,400 30,100 17,300 14,000 26,600 33,700 52,400
2 48,700 43,900 58,500 86,400 56,900 37,800 29,300 17,800 17,300 24,300 33,600 53,200
3 49,900 44,500 60,000 93,300 56,200 36,000 27,700 19,400 17,600 23,200 32,100 55,200
4 50,000 49,800 62,300 98,800 51,700 34,300 22,400 19,500 15,900 22,100 29,400 54,000
5 48,400 54,700 62,000 93,800 52,400 33,900 24,700 19,100 15,700 21,200 28,900 50,800
6 44,100 50,700 71,300 93,300 51,500 33,800 23,600 16,800 16,500 20,100 29,500 49,400
7 45,800 46,000 71,400 93,200 53,800 33,000 23,900 16,800 17,700 20,100 27,100 48,200
8 44,800 44,700 68,100 89,700 53,700 33,600 22,400 15,900 26,900 20,800 27,500 49,300
9 44,400 44,400 63,500 81,500 50,600 33,200 21,800 15,100 28,500 20,500 30,000 47,500
10 48,000 42,800 63,800 78,500 47,500 30,300 20,600 14,100 25,700 21,600 32,800 46,600
11 46,000 38,800 67,600 78,200 46,900 28,600 19,000 14,700 24,800 22,200 34,600 46,300
12 43,100 40,400 69,900 79,000 50,400 28,100 18,400 15,200 23,200 21,400 35,300 48,700
13 41,600 41,700 66,700 73,900 53,200 27,800 18,800 16,500 20,900 19,900 36,900 50,700
14 43,600 41,800 68,500 71,000 53,700 26,900 19,100 18,000 19,200 20,800 36,800 54,400
15 46,200 43,700 71,700 70,600 54,800 27,500 20,500 17,800 18,600 20,000 36,800 54,300
16 46,100 46,800 74,700 73,600 56,400 27,000 19,100 18,000 18,200 20,200 36,400 51,600
17 43,700 46,700 75,800 78,100 56,700 28,300 19,300 17,500 16,700 20,200 37,400 50,300
18 41,800 45,400 73,000 80,800 54,800 30,400 19,400 16,700 18,400 20,500 38,400 49,800
19 40,600 48,700 70,000 75,900 54,100 30,000 17,800 15,700 25,400 23,600 40,000 49,600
20 47,100 51,000 69,500 68,200 52,500 28,300 17,300 18,300 27,400 25,900 39,700 48,400
21 50,900 53,000 71,600 64,400 50,700 28,300 18,200 18,000 22,400 27,900 40,400 46,500
22 47,000 53,400 77,400 63,100 48,200 37,300 17,900 17,300 20,200 29,600 37,900 47,800
23 42,500 56,700 80,100 61,400 45,500 48,600 18,900 16,800 18,300 31,100 38,000 49,800
24 41,900 60,100 83,100 58,400 45,200 48,900 19,500 15,700 21,600 29,500 36,600 49,100
25 48,100 65,200 84,000 57,200 42,300 44,000 21,600 15,500 21,900 29,500 36,100 45,100
26 52,200 69,900 79,600 58,100 40,500 37,900 23,600 14,000 26,300 28,600 36,800 54,900
27 53,600 68,200 78,100 56,400 38,200 32,100 22,400 14,100 31,600 27,800 36,900 55,800
28 58,000 62,000 78,800 58,200 38,100 29,400 20,100 13,000 31,400 28,500 40,600 52,100
29 55,300 64,000 81,300 57,800 37,800 31,900 19,200 12,900 30,900 30,700 47,800 50,300
30 50,700   84,900 55,500 38,000 31,400 19,400 12,900 28,400 33,700 50,100 48,800
31 46,700   83,700   38,900   18,000 13,300   34,100   45,700