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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 01491000 CHOPTANK RIVER NEAR GREENSBORO, MD


Caroline County, Maryland
Hydrologic Unit Code 02060005
Latitude  38°59'49.9", Longitude  75°47'08.9" NAD83
Drainage area 113  square miles
Gage datum 2.73 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 1947-10-01 -> 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
1 204 165 241 251 172 137 62 57 54 88 86 125
2 235 174 248 273 162 142 57 67 52 77 113 119
3 210 205 275 273 163 122 57 63 51 68 128 121
4 186 213 274 251 151 109 59 158 67 62 103 123
5 170 233 258 224 153 111 56 171 58 57 89 131
6 169 226 237 227 159 108 61 127 47 53 92 140
7 168 213 281 227 165 100 61 93 47 50 97 141
8 173 211 275 254 163 139 57 83 46 47 109 195
9 183 195 271 251 155 120 59 79 49 50 105 186
10 211 180 253 225 144 103 73 67 53 59 92 192
11 199 194 234 230 140 109 82 58 66 63 82 168
12 187 214 238 207 142 113 73 60 92 82 95 173
13 192 210 257 203 157 106 109 82 106 81 129 167
14 195 221 309 244 139 112 126 117 67 64 127 202
15 193 226 322 245 122 90 101 91 58 57 120 218
16 180 248 264 291 117 77 78 70 94 52 116 213
17 172 234 248 280 124 115 73 62 123 53 114 219
18 172 218 254 211 128 140 63 58 70 53 109 200
19 194 236 255 178 134 153 57 57 66 58 94 200
20 209 254 271 165 141 147 52 60 64 70 90 170
21 216 221 266 162 141 145 54 61 54 69 97 171
22 212 223 317 154 123 134 59 68 49 60 100 205
23 192 252 300 149 121 134 57 91 52 54 108 188
24 203 316 295 149 121 108 55 74 65 55 100 176
25 226 325 296 161 116 88 58 78 69 66 110 213
26 252 324 255 164 147 88 64 120 67 80 130 219
27 241 280 254 165 160 96 59 101 76 93 120 219
28 241 238 272 176 123 81 58 192 79 90 111 175
29 273 175 301 195 114 72 57 161 69 99 112 172
30 209   292 180 147 62 69 94 75 164 121 174
31 169   268   146   58 62   124   188