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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 01589025 PATAPSCO RIVER NEAR CATONSVILLE, MD


Baltimore County, Maryland
Hydrologic Unit Code 02060003
Latitude  39°15'04.5", Longitude  76°45'49.6" NAD83
Drainage area 301  square miles
Gage datum 66.20 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 -> 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
1 303 357 366 407 861 257 152 138 136 200 357 221
2 321 302 369 441 417 336 137 147 118 188 205 212
3 279 377 341 445 315 488 127 144 96 165 213 194
4 279 478 359 374 334 381 132 491 91 151 160 171
5 248 432 393 323 422 278 132 253 80 147 177 177
6 253 370 351 366 418 276 125 173 144 116 210 163
7 237 349 351 337 499 247 156 166 472 114 189 236
8 207 301 292 343 410 222 243 228 526 111 153 309
9 291 267 316 309 341 214 211 275 521 103 136 238
10 324 242 504 281 307 272 145 228 341 127 165 227
11 298 287 597 258 405 486 134 150 234 201 144 233
12 334 294 487 270 368 339 133 206 207 176 169 188
13 336 341 407 431 364 288 115 176 189 123 210 169
14 253 302 427 344 320 254 116 177 134 128 162 180
15 229 273 378 336 319 199 122 162 121 126 155 304
16 266 342 324 397 569 169 108 137 111 123 246 598
17 260 351 285 354 453 153 103 115 114 106 201 373
18 221 303 275 284 350 151 114 169 150 93 174 419
19 204 271 306 275 403 195 95 126 119 109 154 238
20 349 264 286 361 310 190 100 103 99 115 144 205
21 249 291 363 292 262 196 142 114 93 100 141 292
22 202 314 497 257 255 189 296 239 104 105 196 271
23 205 318 360 253 262 186 419 148 193 96 428 412
24 357 379 371 246 264 209 363 119 161 89 359 326
25 385 454 336 257 232 177 361 100 159 92 415 402
26 307 348 307 250 227 164 402 104 186 110 257 306
27 260 330 307 242 491 289 218 97 219 145 262 341
28 304 326 307 257 375 258 165 162 366 124 189 370
29 256 365 298 291 280 169 178 93 226 495 169 355
30 247   373 977 255 168 374 89 229 616 208 326
31 788   447   220   173 84   310   285