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USGS Daily Statistics for Missouri

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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 07021000 Castor River at Zalma, MO


Bollinger County, Missouri
Hydrologic Unit Code 07140107
Latitude  37°08'47.9", Longitude  90°04'31.8" NAD83
Drainage area 423  square miles
Gage datum 350.49 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 1919-10-01 -> 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
1 990 820 752 1,440 1,320 403 358 126 117 120 349 504
2 998 719 643 1,100 1,320 474 242 127 141 123 366 440
3 799 691 684 949 1,300 461 205 137 177 112 361 779
4 816 619 1,030 1,260 1,230 469 328 192 145 106 300 800
5 802 580 1,030 1,090 1,060 402 257 233 136 106 282 546
6 622 607 968 974 939 382 201 188 124 128 273 496
7 530 617 944 873 1,030 331 206 156 108 143 250 435
8 545 624 823 728 1,110 358 172 163 101 124 309 426
9 511 627 981 833 980 513 160 146 112 138 278 402
10 519 666 1,160 904 810 512 166 153 121 125 223 372
11 624 646 1,380 996 1,110 470 182 171 135 117 229 391
12 685 662 1,400 970 1,130 472 155 128 127 151 235 452
13 700 747 1,170 921 1,040 497 143 141 133 185 266 510
14 1,000 889 1,120 1,140 1,060 579 136 269 149 173 350 642
15 955 778 1,010 1,320 908 456 130 409 129 166 365 629
16 663 786 938 1,190 958 412 147 370 119 149 459 610
17 563 769 906 1,050 1,070 435 156 256 119 196 428 561
18 525 888 1,060 897 1,100 510 187 189 115 197 623 674
19 589 820 1,900 866 876 464 196 151 110 169 725 666
20 622 701 1,270 963 791 365 169 129 106 166 669 578
21 699 715 1,230 1,090 701 455 155 119 105 217 543 603
22 876 790 1,040 1,050 582 373 181 111 120 273 448 886
23 933 859 948 1,140 675 295 153 116 164 238 454 701
24 997 884 944 1,260 537 314 142 118 169 200 496 699
25 970 907 1,030 1,350 497 303 131 118 128 180 568 987
26 686 964 1,060 1,240 548 238 127 109 123 193 475 766
27 591 958 1,040 1,120 599 228 115 109 148 177 500 628
28 543 795 1,210 1,050 585 281 111 138 146 192 675 806
29 512 557 1,170 1,020 448 269 130 127 120 206 584 862
30 719   1,240 1,630 388 297 131 168 114 232 502 685
31 969   1,790   356   128 138   312   802