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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 01589000 PATAPSCO RIVER AT HOLLOFIELD, MD


Baltimore County, Maryland
Hydrologic Unit Code 02060003
Latitude  39°18'37.1", Longitude  76°47'32.7" NAD83
Drainage area 285  square miles
Gage datum 186.9 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 1943-10-01 -> 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
1 317 228 295 337 345 257 176 148 164 176 163 166
2 281 254 283 323 261 359 143 130 103 150 129 164
3 215 273 266 296 256 273 150 115 83 136 151 150
4 212 292 268 285 296 248 140 235 111 113 140 195
5 208 249 294 319 286 227 144 164 102 106 139 170
6 208 273 301 305 337 225 143 142 156 102 131 187
7 188 356 292 300 297 215 134 156 140 100 147 202
8 178 275 269 286 267 204 159 118 160 97 139 217
9 222 231 261 275 247 177 159 104 159 120 114 213
10 200 227 253 283 234 195 141 122 144 152 140 192
11 198 236 299 245 243 229 129 107 162 143 129 303
12 207 275 297 241 256 188 126 122 180 124 144 220
13 195 285 279 321 243 209 159 194 132 109 146 207
14 214 301 314 328 235 232 142 123 126 117 142 205
15 199 269 290 325 236 172 151 108 98 114 122 208
16 194 254 257 312 313 162 128 91 91 102 145 286
17 176 266 258 289 287 161 122 112 94 95 129 225
18 171 239 248 255 276 149 179 128 118 122 125 213
19 172 256 281 240 265 180 133 100 126 123 123 169
20 239 239 269 239 248 205 122 100 95 112 162 161
21 240 241 304 221 228 195 270 94 97 106 181 219
22 204 260 332 218 234 604 179 114 122 98 199 218
23 183 291 325 220 242 276 208 95 180 143 184 212
24 257 282 309 227 236 238 184 83 168 113 159 202
25 264 305 274 241 249 186 152 90 180 107 243 225
26 301 342 309 285 296 161 159 82 457 126 181 219
27 235 302 289 355 239 191 126 132 198 135 157 205
28 223 297 274 299 255 164 122 109 177 124 184 197
29 204 279 287 259 238 156 114 81 138 208 224 203
30 200   310 366 239 200 142 74 136 221 192 240
31 291   325   245   115 78   152   225