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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 -> 2023-09-30)

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
1 520 485 573 726 737 435 360 306 277 419 323 511
2 516 513 668 739 534 453 355 261 611 301 284 459
3 512 613 566 741 540 431 338 246 266 299 368 447
4 514 620 550 655 542 470 336 367 241 260 286 406
5 456 579 655 689 520 432 356 310 212 282 328 486
6 437 540 578 623 562 442 330 238 380 265 327 478
7 437 543 577 585 554 449 343 239 368 223 296 461
8 493 462 581 593 529 432 336 267 338 298 347 504
9 491 429 676 598 528 465 291 258 327 389 359 510
10 420 434 699 689 512 447 307 331 253 332 322 466
11 454 481 746 607 528 460 343 265 238 359 327 579
12 521 541 582 577 526 404 336 275 224 311 377 588
13 447 571 661 643 545 460 458 534 225 256 390 565
14 511 486 780 592 537 431 467 338 223 261 317 635
15 460 549 707 652 469 381 394 256 402 291 305 520
16 448 577 591 885 559 349 334 225 398 276 367 614
17 435 528 566 732 570 397 315 240 471 285 398 635
18 502 504 574 585 481 431 310 254 355 274 327 546
19 578 506 618 582 545 441 283 301 347 426 305 488
20 706 521 708 583 479 487 288 257 293 355 361 422
21 614 535 770 531 448 572 379 250 260 339 351 661
22 471 595 991 554 443 394 316 314 392 294 337 489
23 444 644 712 557 470 376 386 232 362 262 433 518
24 596 735 733 536 507 369 352 214 413 298 337 519
25 822 873 658 562 421 360 284 203 311 311 400 643
26 810 696 584 562 465 366 268 196 331 295 423 567
27 643 524 691 606 438 415 310 225 381 392 442 547
28 621 528 686 543 402 579 382 529 454 455 529 477
29 547 559 737 526 468 403 265 282 500 425 469 461
30 493   680 543 513 328 266 254 363 494 520 424
31 504   736   399   249 226   328   425