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USGS Daily Statistics for the Nation

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 04265432 GRASS RIVER AT CHASE MILLS NY


St. Lawrence County, New York
Hydrologic Unit Code 04150304
Latitude  44°50'47.5", Longitude  75°04'42.4" NAD83
Drainage area 598  square miles
Gage datum 225.59 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 2002-10-01 -> 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 1,360 843 923 2,230 1,790 719 899 525 572 699 1,650 1,760
2 1,400 847 889 2,490 2,030 698 834 525 558 803 1,570 1,960
3 1,330 810 917 2,670 1,850 737 735 453 448 718 1,440 2,020
4 1,170 782 938 2,670 1,800 683 719 469 374 584 1,330 1,860
5 1,110 782 973 2,760 1,810 671 671 476 356 498 1,210 1,650
6 1,150 761 1,000 2,750 1,740 669 576 465 485 452 1,130 1,440
7 1,120 693 1,100 2,720 1,510 872 515 411 453 526 1,100 1,400
8 1,060 663 1,240 2,730 1,310 914 486 369 397 717 1,040 1,320
9 1,140 637 1,270 2,690 1,220 788 528 410 420 838 972 1,220
10 1,230 635 1,330 2,560 1,180 876 594 827 571 829 914 1,110
11 1,200 676 1,570 2,560 1,200 1,010 689 1,130 650 746 873 1,160
12 1,340 684 1,890 2,610 1,130 1,020 886 759 599 605 882 1,350
13 1,580 669 2,080 2,670 974 984 939 572 499 519 1,000 1,330
14 1,570 652 1,990 2,780 872 1,010 737 474 418 611 1,090 1,170
15 1,420 641 1,890 2,830 958 946 607 462 387 693 1,040 1,070
16 1,250 648 1,810 2,710 1,190 848 525 472 376 919 1,040 1,090
17 1,100 704 1,880 2,570 1,580 751 607 540 495 1,080 1,140 1,090
18 946 740 1,970 2,240 1,580 690 667 490 805 1,130 1,180 1,060
19 853 769 1,950 1,950 1,310 608 673 448 719 1,050 1,140 1,140
20 822 792 1,780 1,850 1,110 542 707 474 512 952 1,130 1,160
21 800 818 1,720 1,870 969 620 644 497 438 958 1,080 1,080
22 755 837 1,580 1,800 872 637 601 535 395 1,040 1,050 1,090
23 718 786 1,460 1,710 874 613 493 612 408 1,140 1,160 1,190
24 728 742 1,500 1,750 921 647 472 609 390 1,200 1,150 1,310
25 773 787 1,510 1,690 948 834 720 496 348 1,160 1,130 1,390
26 939 927 1,530 1,550 945 936 657 393 320 1,110 1,210 1,540
27 958 1,010 1,660 1,530 906 879 531 337 333 1,160 1,230 1,510
28 917 956 1,920 1,570 907 745 539 304 388 1,270 1,290 1,450
29 893 1,030 1,950 1,630 1,000 766 539 307 408 1,330 1,510 1,470
30 811   2,010 1,580 947 872 491 371 487 1,490 1,620 1,360
31 788   2,130   808   471 472   1,610   1,340