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USGS Surface-Water 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 01589035 PATAPSCO RIVER NEAR ELKRIDGE, MD


Baltimore County, Maryland
Hydrologic Unit Code 02060003
Latitude  39°13'38.4", Longitude  76°43'22.8" NAD83
Drainage area 312  square miles
Gage datum 8.50 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 2010-10-01 -> 2022-09-30)

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
1 363 409 424 450 977 330 172 179 180 271 477 266
2 380 350 413 367 512 441 164 187 153 235 267 256
3 334 452 378 324 378 627 154 175 121 196 274 221
4 336 588 374 296 389 524 157 639 114 162 203 193
5 295 525 427 304 496 342 162 326 99 169 224 210
6 286 441 378 360 479 319 153 215 145 137 260 192
7 256 414 391 337 427 310 195 195 723 134 234 294
8 233 357 322 339 379 249 308 265 806 133 192 371
9 232 314 333 322 350 253 271 178 705 124 169 281
10 274 282 541 301 328 359 179 168 485 156 207 271
11 331 337 646 280 477 675 167 135 280 280 175 229
12 409 349 549 293 422 436 170 301 248 233 208 213
13 372 351 460 512 427 373 142 228 202 154 259 198
14 290 324 482 404 365 326 143 228 160 157 200 215
15 260 306 429 395 363 257 149 215 146 154 188 337
16 304 389 365 491 655 216 126 184 135 157 278 673
17 304 360 320 426 563 196 121 145 144 133 246 437
18 256 323 307 331 434 195 145 185 215 114 204 315
19 236 297 353 305 508 253 116 135 149 136 180 255
20 423 293 331 436 383 247 125 125 122 148 170 225
21 296 329 405 348 317 254 177 141 113 125 155 346
22 233 364 607 301 308 238 452 317 119 133 191 313
23 229 363 386 298 309 227 580 192 237 120 500 388
24 427 451 402 297 328 263 559 151 183 109 408 373
25 453 546 372 320 281 222 518 126 190 112 495 494
26 343 406 340 303 282 206 561 138 206 144 305 366
27 295 384 342 292 692 366 308 121 271 186 323 403
28 264 372 342 286 434 357 234 226 472 158 224 419
29 236 450 337 319 334 217 259 116 296 673 200 428
30 245   449 1,190 317 189 472 104 304 806 252 400
31 888   556   271   251 102   404   342