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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 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 -> 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
1 314 230 293 340 342 255 175 147 163 174 159 164
2 278 254 285 342 259 355 142 128 103 150 127 162
3 213 273 268 324 254 270 149 116 82 135 148 149
4 210 291 269 305 294 246 139 233 111 112 137 193
5 207 248 294 330 285 227 142 163 101 106 136 169
6 207 271 301 312 335 227 142 140 154 102 128 185
7 190 353 292 304 295 215 133 155 139 100 144 200
8 177 274 269 288 266 203 158 118 159 97 136 214
9 234 230 263 278 246 176 157 131 158 119 112 211
10 214 226 265 284 234 193 139 138 142 149 138 190
11 199 235 303 247 242 227 128 113 161 140 127 306
12 207 273 299 244 256 186 125 124 178 121 142 220
13 200 289 281 322 243 207 158 194 131 107 143 205
14 214 303 314 328 234 229 141 123 124 115 139 203
15 199 270 290 324 236 171 150 108 97 112 120 206
16 194 254 257 311 311 161 127 91 90 101 142 283
17 176 266 258 289 286 160 121 112 93 94 126 224
18 171 239 248 255 275 148 178 129 117 119 124 236
19 171 256 279 240 264 178 132 102 125 121 121 171
20 238 239 267 239 246 203 121 101 94 110 160 161
21 238 240 302 221 227 193 267 94 97 104 179 217
22 202 259 330 218 232 597 177 113 122 97 201 217
23 182 290 328 220 240 273 206 95 179 140 182 210
24 255 281 311 226 235 235 182 82 167 111 157 201
25 263 304 275 240 247 184 151 89 178 105 240 223
26 299 339 308 283 294 160 158 82 454 123 180 217
27 234 300 289 352 239 189 125 132 197 133 155 204
28 235 295 275 297 256 162 121 108 176 122 182 200
29 212 274 287 257 237 155 113 81 137 203 222 202
30 205   308 363 238 200 141 75 135 216 190 238
31 292   324   243   114 78   149   224