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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 01576500 Conestoga River at Lancaster, PA


Lancaster County, Pennsylvania
Hydrologic Unit Code 02050306
Latitude  40°03'00", Longitude  76°16'39" NAD27
Drainage area 324  square miles
Gage datum 245.63 feet above NGVD29
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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 1928-10-01 -> 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
1 451 454 661 698 599 402 297 278 276 315 278 400
2 532 480 664 732 500 468 275 279 354 274 250 400
3 505 574 618 723 509 415 306 270 276 297 312 361
4 516 600 661 680 522 392 294 399 236 226 265 380
5 469 522 733 700 488 372 268 302 204 219 247 434
6 486 481 703 699 559 377 294 238 249 212 251 442
7 462 606 713 699 522 364 339 252 278 198 254 462
8 454 548 626 663 490 362 363 239 459 234 267 420
9 494 456 639 660 480 327 295 245 400 327 351 400
10 467 456 624 679 465 323 324 242 236 261 265 408
11 431 486 713 626 455 357 313 262 265 270 265 464
12 434 511 730 617 460 389 312 223 271 258 286 486
13 415 504 707 649 487 413 361 345 250 214 307 509
14 435 584 720 617 492 372 343 285 208 195 287 524
15 460 540 770 629 428 315 386 218 233 218 294 452
16 419 546 659 772 464 321 308 197 264 228 293 459
17 381 540 630 715 505 367 285 242 320 239 355 494
18 422 540 643 585 436 317 306 277 261 249 321 448
19 463 541 634 557 494 369 286 316 285 304 283 409
20 541 548 677 572 465 334 264 229 211 292 310 389
21 510 542 702 524 440 367 354 224 193 260 309 492
22 484 559 868 539 414 626 322 366 221 223 328 442
23 437 583 777 520 504 834 332 295 261 251 358 418
24 515 653 751 504 442 349 401 379 255 245 294 423
25 632 737 692 548 391 300 260 231 282 221 395 485
26 687 757 665 535 423 332 277 219 265 240 371 428
27 636 707 737 567 390 385 356 197 271 264 348 449
28 574 680 728 554 386 429 397 271 286 293 391 414
29 484 583 734 539 416 389 342 232 253 289 435 413
30 470   658 521 429 330 308 197 339 372 418 454
31 517   678   392   255 189   286   429