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USGS Daily Statistics for the Nation

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 01581920 GUNPOWDER FALLS NEAR PARKTON, MD


Baltimore County, Maryland
Hydrologic Unit Code 02060003
Latitude  39°37'08.6", Longitude  76°41'25.3" NAD83
Drainage area 81.5  square miles
Gage datum 355.43 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 1999-10-01 -> 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
1 101 109 111 129 163 104 71 115 88 103 123 87
2 105 95 148 139 130 119 68 123 96 105 95 87
3 99 107 119 163 118 111 69 107 87 100 91 88
4 95 137 107 146 121 123 70 134 83 89 81 82
5 94 133 114 125 128 121 68 108 82 87 80 81
6 95 136 105 116 133 122 67 100 81 91 85 79
7 93 141 100 115 137 117 86 96 130 87 82 86
8 90 116 97 121 129 116 104 97 237 82 76 93
9 87 100 99 117 119 109 91 94 134 83 73 98
10 92 95 119 108 111 108 78 87 127 82 76 94
11 102 94 165 104 111 112 74 81 111 103 74 113
12 112 93 148 108 112 122 79 76 108 102 79 119
13 103 95 137 124 112 114 80 83 107 91 88 94
14 114 92 142 118 108 108 77 84 98 90 79 91
15 108 90 126 127 112 103 76 82 98 91 75 99
16 105 96 116 129 132 98 77 81 95 87 85 127
17 105 103 111 123 127 96 86 81 95 85 83 116
18 113 96 104 108 111 98 82 76 99 87 78 103
19 106 88 102 106 128 92 80 75 98 80 77 92
20 117 87 101 113 120 91 81 74 104 77 85 89
21 106 88 106 110 113 90 79 71 98 73 78 101
22 96 93 138 108 109 85 74 75 94 70 78 98
23 99 98 119 116 105 84 96 82 122 68 116 110
24 108 103 123 111 103 84 170 86 110 70 102 112
25 123 117 115 105 103 84 162 86 102 74 111 132
26 115 100 108 110 106 87 154 87 99 69 91 127
27 105 97 101 126 107 88 108 93 106 80 93 120
28 100 100 110 121 117 86 99 100 116 92 86 112
29 96 103 120 116 113 80 91 130 129 124 85 106
30 95   125 148 108 73 89 94 118 184 84 99
31 153   133   106   91 85   122   95