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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
1 503 319 450 681 868 538 396 74 171 146 243 312
2 390 339 465 731 791 566 290 65 258 146 230 342
3 334 306 437 709 596 460 242 55 190 142 227 425
4 419 322 598 699 472 380 231 58 102 204 214 464
5 510 390 765 668 467 344 195 52 70 153 212 320
6 416 450 695 684 457 437 181 48 88 151 193 260
7 325 484 580 621 514 474 164 89 151 210 174 251
8 343 325 615 538 620 502 150 144 175 174 140 335
9 394 365 684 560 567 507 256 93 214 150 123 287
10 307 409 707 546 594 452 252 50 229 157 171 241
11 333 336 951 628 741 370 294 45 182 151 189 249
12 343 375 793 828 894 342 244 69 120 133 173 341
13 423 497 726 668 826 596 337 69 144 123 193 334
14 468 429 726 637 888 720 404 44 299 174 237 276
15 381 345 766 615 1,010 626 400 59 456 151 214 281
16 298 338 788 628 803 590 265 77 327 127 223 274
17 249 457 703 667 660 476 192 53 184 178 190 241
18 254 516 691 668 807 465 303 47 163 216 180 225
19 247 595 859 660 740 507 452 66 183 149 329 187
20 334 591 805 597 539 526 303 118 110 118 309 190
21 296 638 649 569 516 541 241 237 84 111 208 229
22 274 614 556 611 472 566 256 153 90 98 183 348
23 290 730 565 731 469 602 253 203 106 117 213 302
24 338 703 605 638 438 437 173 233 133 130 224 253
25 373 517 595 773 464 440 133 206 149 199 209 313
26 407 432 526 795 537 547 127 160 162 211 220 388
27 348 466 479 738 486 541 165 173 140 222 285 423
28 332 541 542 783 460 414 140 300 153 199 481 562
29 287 231 616 711 472 433 107 238 142 161 424 526
30 289   652 892 491 398 92 162 153 239 295 568
31 322   667   524   101 127   305   549