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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 05542000 MAZON RIVER NEAR COAL CITY, IL


Grundy County, Illinois
Hydrologic Unit Code 07120005
Latitude  41°17'10.3", Longitude  88°21'35.5" NAD83
Drainage area 455  square miles
Gage datum 527.21 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 1939-10-01 -> 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
1 509 322 455 681 868 538 396 74 171 146 243 316
2 394 342 471 731 791 566 290 65 258 146 230 346
3 338 309 442 709 596 460 242 55 190 142 227 430
4 424 325 601 699 472 380 231 58 102 204 214 469
5 516 394 750 668 467 344 195 52 70 153 214 324
6 421 455 685 684 457 437 181 48 88 151 195 263
7 329 489 577 621 514 474 164 89 151 210 176 254
8 347 329 615 538 620 502 150 144 175 174 141 339
9 399 369 687 560 567 507 256 93 214 150 125 290
10 311 414 712 546 594 452 252 50 229 157 173 244
11 337 340 959 628 741 370 294 45 182 151 192 252
12 347 379 800 828 894 342 244 69 120 133 175 345
13 428 503 732 668 826 596 337 69 144 123 195 338
14 474 434 733 637 888 720 404 44 299 174 240 280
15 386 349 773 615 1,010 626 400 59 456 151 216 284
16 302 342 794 628 803 590 265 77 327 127 225 277
17 252 463 708 667 660 476 192 53 184 178 192 243
18 257 522 696 668 807 465 303 47 163 216 182 227
19 250 602 866 660 740 507 452 66 183 149 333 189
20 338 598 811 597 539 526 303 118 110 118 313 192
21 299 646 650 569 516 541 241 237 84 111 211 231
22 277 621 557 611 472 566 256 153 90 98 185 352
23 294 739 568 731 469 602 253 203 106 117 216 305
24 342 712 609 638 438 437 173 233 133 130 227 256
25 377 523 600 773 464 440 133 206 149 199 212 317
26 412 437 530 795 537 547 127 160 162 211 222 392
27 352 471 483 738 486 541 165 173 140 222 288 428
28 336 547 547 783 460 414 140 300 153 199 487 569
29 290 231 621 711 472 433 107 238 142 161 430 532
30 293   658 892 491 398 92 162 153 239 299 575
31 326   673   524   101 127   305   556