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USGS 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 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
1 104 112 114 132 165 106 71 115 88 103 126 86
2 108 97 153 143 129 123 68 123 96 105 96 87
3 101 110 123 168 116 111 69 107 87 100 92 88
4 98 142 110 149 119 123 70 134 83 89 82 81
5 96 137 117 128 126 121 68 108 82 87 81 81
6 97 141 108 118 132 122 67 100 81 91 86 79
7 96 145 103 117 136 117 86 96 130 87 83 86
8 92 119 100 123 127 116 104 97 237 82 77 94
9 90 103 102 120 117 109 91 94 134 84 73 99
10 94 97 123 110 109 108 78 87 127 83 76 95
11 105 97 170 105 109 112 74 81 111 105 75 116
12 116 95 153 110 110 122 79 76 108 104 80 122
13 106 98 141 127 110 114 80 83 107 93 89 96
14 117 94 147 121 106 108 77 84 98 92 80 92
15 111 92 130 130 111 103 76 82 98 93 75 100
16 108 99 120 132 133 98 77 81 95 88 86 130
17 108 106 114 126 128 96 86 81 95 87 84 119
18 117 98 107 110 112 98 82 76 99 89 79 106
19 109 91 105 108 130 92 80 75 98 81 76 95
20 120 89 104 115 122 91 81 74 104 78 84 91
21 109 90 109 111 115 90 79 71 98 73 78 104
22 98 96 142 109 112 85 74 75 94 71 77 101
23 102 101 123 118 108 84 96 82 122 68 117 113
24 112 106 127 112 105 84 170 86 110 71 102 115
25 127 120 118 105 106 84 162 86 102 74 111 136
26 119 103 111 110 109 87 154 87 99 70 91 131
27 109 100 104 127 110 88 108 93 106 81 93 124
28 102 103 113 121 120 86 99 100 116 94 85 116
29 98 103 123 115 116 80 91 130 129 127 84 109
30 98   128 149 111 73 89 94 118 190 84 102
31 158   136   108   91 85   125   98