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USGS Daily Statistics for Pennsylvania

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[!] Over the next year, the USGS Pennsylvania Water Science Center will be updating the geodetic vertical elevation (gage datum) for many locations. Click HERE for additional information including a current list of streamgages with upcoming datum changes. This update in gage datum does not affect the location of the streamgage, nor the observed local gage height or discharge recorded at the streamgage.


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 01481000 Brandywine Creek at Chadds Ford, PA


Delaware County, Pennsylvania
Hydrologic Unit Code 02040205
Latitude  39°52'11", Longitude  75°35'37" NAD27
Drainage area 287  square miles
Gage datum 149.7 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 1973-10-01 -> 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
1 521 488 567 723 758 427 358 302 271 415 319 505
2 516 514 672 770 534 444 351 258 593 298 281 455
3 514 609 574 803 536 423 333 247 261 296 363 446
4 519 615 560 711 536 460 332 365 237 257 283 406
5 460 576 653 702 516 424 350 306 209 279 324 481
6 438 537 582 632 556 440 325 237 370 264 323 473
7 452 540 579 591 546 441 342 257 359 222 293 457
8 496 462 578 596 522 423 335 281 331 296 343 499
9 509 430 673 600 521 454 301 331 319 384 355 504
10 549 435 728 686 506 437 327 356 252 328 318 466
11 475 479 743 606 522 449 342 273 238 355 323 617
12 528 537 582 579 519 398 333 280 222 308 372 592
13 473 572 657 640 537 457 449 529 223 254 384 563
14 520 489 770 589 529 424 459 337 220 259 314 629
15 466 546 699 646 467 375 391 257 392 294 305 516
16 455 572 587 869 551 346 335 227 388 275 362 608
17 444 530 561 722 561 392 316 240 457 283 393 629
18 502 504 569 580 475 422 311 254 348 271 323 659
19 576 504 611 576 536 431 285 297 339 421 302 516
20 710 517 697 577 473 475 289 255 286 352 357 430
21 611 531 756 526 442 557 377 248 254 337 347 661
22 471 588 968 548 437 385 314 308 381 291 361 490
23 453 636 738 554 463 368 385 229 356 260 432 518
24 597 723 742 532 498 364 348 212 413 295 335 518
25 817 853 657 553 415 356 295 202 321 308 396 639
26 833 683 584 553 458 366 286 194 328 292 420 563
27 649 519 685 599 432 453 308 221 375 387 447 546
28 640 525 684 539 397 575 376 514 444 449 525 552
29 559 561 729 534 460 397 265 277 487 419 465 473
30 499   672 549 505 330 265 250 355 487 514 431
31 508   725   393   247 223   324   429