| DEER CREEK NEAR CHICAGO HEIGHTS, IL | Minor flooding | 10.92 ft | 617 cfs |
| EAST BRANCH DU PAGE RIVER NEAR DOWNERS GROVE, IL | Minor flooding | 14.60 ft | 598 cfs |
| EDWARDS RIVER NEAR NEW BOSTON, IL | Minor flooding | 19.63 ft | 1,740 cfs |
| LANSING DITCH NEAR LANSING, IL | Minor flooding | 7.90 ft | 167 cfs |
| ROCK RIVER NEAR JOSLIN, IL | Minor flooding | 12.69 ft | 20,400 cfs |
| SALT CREEK NEAR ROWELL, IL | Minor flooding | 15.83 ft | 1,000 cfs |
| EMBARRAS RIVER AT LAWRENCEVILLE, IL | Near flood stage | 27.92 ft | 7,550 cfs |
| FOX RIVER (TAILWATER) NEAR MCHENRY, IL | Near flood stage | 3.05 ft | — |
| ILLINOIS RIVER AT HENRY, IL | Near flood stage | 22.14 ft | 51,800 cfs |
| ILLINOIS RIVER AT MARSEILLES, IL | Near flood stage | 17.17 ft | 33,400 cfs |
| ILLINOIS RIVER AT MEREDOSIA, IL | Near flood stage | 14.07 ft | — |
| ILLINOIS RIVER AT VALLEY CITY, IL | Near flood stage | 12.50 ft | 41,500 cfs |
| KISHWAUKEE RIVER AT BELVIDERE, IL | Near flood stage | 6.88 ft | 2,690 cfs |
| LA MOINE RIVER AT RIPLEY, IL | Near flood stage | 21.61 ft | 7,780 cfs |
| LITTLE CALUMET RIVER AT SOUTH HOLLAND, IL | Near flood stage | 13.12 ft | 1,570 cfs |
| LITTLE WABASH RIVER BELOW CLAY CITY, IL | Near flood stage | 16.56 ft | 2,400 cfs |
| MACKINAW RIVER NEAR CONGERVILLE, IL | Near flood stage | 11.93 ft | 6,420 cfs |
| Mississippi River at Chester, IL | Near flood stage | 26.03 ft | 418,000 cfs |
| Mississippi River at Grafton, IL | Near flood stage | 18.53 ft | 254,000 cfs |
| POPE CREEK NEAR KEITHSBURG, IL | Near flood stage | 22.03 ft | 388 cfs |
| SANGAMON RIVER AT MONTICELLO, IL | Near flood stage | 12.91 ft | 2,150 cfs |
| SUGAR CREEK AT MILFORD, IL | Near flood stage | 15.52 ft | 2,910 cfs |
| THORN CREEK AT GLENWOOD, IL | Near flood stage | 7.43 ft | 897 cfs |
| THORN CREEK AT THORNTON, IL | Near flood stage | 8.91 ft | 1,510 cfs |
| WABASH RIVER AT MT. CARMEL, IL | Near flood stage | 14.02 ft | 49,700 cfs |
| ADDISON CREEK AT BELLWOOD, IL | No flooding | 2.71 ft | 108 cfs |
| AUX SABLE CREEK NEAR MORRIS, IL | No flooding | 5.24 ft | 492 cfs |
| BIG BUREAU CREEK AT PRINCETON, IL | No flooding | 4.57 ft | 820 cfs |
| BIG MUDDY RIVER AT PLUMFIELD, IL | No flooding | 4.02 ft | 165 cfs |
| BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL | No flooding | 12.58 ft | -67 cfs |
| BLACKBERRY CREEK NEAR MONTGOMERY, IL | No flooding | 4.02 ft | 66 cfs |
| BLACKBERRY CREEK NEAR YORKVILLE, IL | No flooding | 3.96 ft | 68 cfs |
| BOONE CREEK NEAR MC HENRY, IL | No flooding | 1.82 ft | 36 cfs |
| BUFFALO CREEK NEAR WHEELING, IL | No flooding | 2.56 ft | 81 cfs |
| BUTTERFIELD CREEK AT FLOSSMOOR, IL | No flooding | 6.52 ft | 250 cfs |
| CALUMET UNION DRAINAGE CANAL NEAR MARKHAM, IL | No flooding | 4.58 ft | 154 cfs |
| CHICAGO RIVER AT COLUMBUS DRIVE AT CHICAGO, IL | No flooding | -2.54 ft | — |
| CHICAGO S & S CANAL AT WESTERN AVE AT CHICAGO, IL | No flooding | -2.56 ft | — |
| CHICAGO SANITARY AND SHIP CANAL AT STICKNEY, IL | No flooding | -2.61 ft | — |
| CHICAGO SANITARY AND SHIP CANAL NR LEMONT, IL | No flooding | 24.71 ft | 4,970 cfs |
| DES PLAINES R AT ALGONQUIN RD AT DES PLAINES, IL | No flooding | 11.28 ft | 1,060 cfs |
| DES PLAINES RIVER AT LINCOLNSHIRE, IL | No flooding | 9.01 ft | 673 cfs |
| DES PLAINES RIVER AT LYONS, IL | No flooding | 14.84 ft | — |
| DES PLAINES RIVER AT RIVER FOREST, IL | No flooding | 7.70 ft | — |
| DES PLAINES RIVER AT RIVERSIDE, IL | No flooding | 4.80 ft | 2,130 cfs |
| DES PLAINES RIVER AT ROUTE 53 AT JOLIET, IL | No flooding | 539.20 ft | 7,330 cfs |
| DES PLAINES RIVER AT RUSSELL, IL | No flooding | 5.66 ft | 141 cfs |
| DES PLAINES RIVER NEAR DES PLAINES, IL | No flooding | 11.28 ft | 1,140 cfs |
| DES PLAINES RIVER NEAR GURNEE, IL | No flooding | 3.97 ft | 357 cfs |
| DES PLAINES RIVER NEAR LEMONT, IL | No flooding | 8.40 ft | 2,200 cfs |
| DU PAGE RIVER AT SHOREWOOD, IL | No flooding | 11.62 ft | 1,030 cfs |
| DU PAGE RIVER NEAR PLAINFIELD, IL | No flooding | 8.59 ft | 1,050 cfs |
| EAST BRANCH DU PAGE RIVER AT BOLINGBROOK, IL | No flooding | 17.69 ft | 583 cfs |
| EAST BRANCH DUPAGE RIVER AT SHORT ST AT LISLE, IL | No flooding | 9.96 ft | 741 cfs |
| EMBARRAS RIVER AT STE. MARIE, IL | No flooding | 11.69 ft | 5,350 cfs |
| EMBARRAS RIVER NEAR CAMARGO, IL | No flooding | 9.27 ft | 952 cfs |
| FERSON CREEK NEAR ST. CHARLES, IL | No flooding | 3.07 ft | 182 cfs |
| FLAG CREEK NEAR WILLOW SPRINGS, IL | No flooding | 5.88 ft | 359 cfs |
| FOX RIVER (TAILWATER) AT ALGONQUIN, IL | No flooding | 7.87 ft | 2,380 cfs |
| FOX RIVER AT ALGONQUIN, IL | No flooding | 1.67 ft | — |
| FOX RIVER AT DAYTON, IL | No flooding | 8.91 ft | 4,850 cfs |
| FOX RIVER AT JOHNSBURG, IL | No flooding | 4.33 ft | — |
| FOX RIVER AT MONTGOMERY, IL | No flooding | 12.44 ft | 3,240 cfs |
| FOX RIVER AT SOUTH ELGIN, IL | No flooding | 13.34 ft | 2,690 cfs |
| FOX RIVER AT YORKVILLE, IL | No flooding | 13.59 ft | 3,390 cfs |
| GREEN RIVER NEAR GENESEO, IL | No flooding | 9.61 ft | 3,070 cfs |
| HENDERSON CREEK NEAR OQUAWKA, IL | No flooding | 19.17 ft | 1,190 cfs |
| HICKORY CREEK AT JOLIET, IL | No flooding | 12.46 ft | 367 cfs |
| ILLINOIS RIVER AT MORRIS, IL | No flooding | 12.38 ft | 31,700 cfs |
| ILLINOIS RIVER AT SENECA, IL | No flooding | 24.09 ft | — |
| IROQUOIS RIVER AT IROQUOIS, IL | No flooding | 14.74 ft | 2,070 cfs |
| IROQUOIS RIVER NEAR CHEBANSE, IL | No flooding | 11.48 ft | 9,130 cfs |
| KANKAKEE R AT INFLOW OF POWER PLANT NR LORENZO, IL | No flooding | 504.87 ft | — |
| KANKAKEE RIVER AT MOMENCE, IL | No flooding | 4.10 ft | 6,090 cfs |
| KANKAKEE RIVER NEAR WILMINGTON, IL | No flooding | 4.59 ft | 18,400 cfs |
| KASKASKIA RIVER AT CARLYLE, IL | No flooding | 14.99 ft | 3,530 cfs |
| KASKASKIA RIVER AT NEW ATHENS, IL | No flooding | 72.28 ft | 6,840 cfs |
| KASKASKIA RIVER AT SHELBYVILLE, IL | No flooding | 10.70 ft | 1,470 cfs |
| KASKASKIA RIVER AT VANDALIA, IL | No flooding | 8.55 ft | 1,650 cfs |
| KASKASKIA RIVER NEAR COWDEN, IL | No flooding | 7.41 ft | 1,330 cfs |
| KISHWAUKEE RIVER AT MARENGO, IL | No flooding | 10.70 ft | 718 cfs |
| KISHWAUKEE RIVER NEAR PERRYVILLE, IL | No flooding | 10.50 ft | 4,810 cfs |
| KRESS CREEK AT WEST CHICAGO, IL | No flooding | 4.40 ft | 29 cfs |
| LA MOINE RIVER AT COLMAR, IL | No flooding | 18.11 ft | 3,460 cfs |
| LITTLE WABASH RIVER AT MAIN ST AT CARMI, IL | No flooding | 10.01 ft | — |
| LITTLE WABASH RIVER NEAR EFFINGHAM, IL | No flooding | 11.12 ft | 182 cfs |
| LONG RUN NEAR LEMONT, IL | No flooding | 2.16 ft | 35 cfs |
| MAZON RIVER NEAR COAL CITY, IL | No flooding | 5.17 ft | 1,830 cfs |
| MC DONALD CREEK NEAR MOUNT PROSPECT, IL | No flooding | 1.96 ft | 34 cfs |
| MIDDLE FORK VERMILION RIVER ABOVE OAKWOOD, IL | No flooding | 6.13 ft | 3,700 cfs |
| MIDLOTHIAN CREEK AT OAK FOREST, IL | No flooding | 2.97 ft | 180 cfs |
| MILL CREEK AT OLD MILL CREEK, IL | No flooding | 7.25 ft | 71 cfs |
| MILL CREEK NEAR BATAVIA, IL | No flooding | 2.70 ft | 29 cfs |
| MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, IL | No flooding | 8.57 ft | — |
| Mississippi River at Thebes, IL | No flooding | 27.89 ft | 422,000 cfs |
| Mississippi River Pool Lock and Dam 26 at Alton,IL | No flooding | 16.56 ft | — |
| NATALIE CREEK AT MIDLOTHIAN, IL | No flooding | 6.10 ft | 46 cfs |
| NB CHICAGO RIVER AT GRAND AVENUE AT CHICAGO, IL | No flooding | -2.29 ft | — |
| NB CHICAGO RIVER AT N PULASKI ROAD AT CHICAGO, IL | No flooding | 12.72 ft | 322 cfs |
| NIPPERSINK CREEK ABOVE WONDER LAKE, IL | No flooding | 6.10 ft | 267 cfs |
| NIPPERSINK CREEK NEAR SPRING GROVE, IL | No flooding | 7.49 ft | 686 cfs |
| NORTH BRANCH CHICAGO RIVER AT DEERFIELD, IL | No flooding | 6.42 ft | 85 cfs |
| NORTH BRANCH CHICAGO RIVER AT NILES, IL | No flooding | 3.62 ft | 388 cfs |
| NORTH FORK EMBARRAS RIVER NEAR OBLONG, IL | No flooding | 5.55 ft | 242 cfs |
| NORTH FORK VERMILION RIVER NEAR BISMARCK, IL | No flooding | 7.82 ft | — |
| OHIO RIVER AT DAM 51 AT GOLCONDA, IL | No flooding | 30.23 ft | — |
| OHIO RIVER AT OLMSTED, IL | No flooding | 30.22 ft | 225,000 cfs |
| OHIO RIVER AT SMITHLAND DAM, SMITHLAND, KY | No flooding | 12.93 ft | 126,000 cfs |
| PECATONICA RIVER AT FREEPORT, IL | No flooding | 11.43 ft | 2,590 cfs |
| PECATONICA RIVER NR SHIRLAND, ILL | No flooding | 9.89 ft | 4,010 cfs |
| PLUM CREEK NEAR CRETE, IL | No flooding | 12.31 ft | 353 cfs |
| POPLAR CREEK AT ELGIN, IL | No flooding | 1.96 ft | 75 cfs |
| ROCK RIVER ABOVE DAM AT ROCKFORD, IL | No flooding | 3.05 ft | — |
| ROCK RIVER AT AUBURN ST AT ROCKFORD | No flooding | 4.03 ft | — |
| ROCK RIVER AT BYRON, IL | No flooding | 10.02 ft | 13,900 cfs |
| ROCK RIVER AT COMO, IL | No flooding | 9.88 ft | 19,800 cfs |
| ROCK RIVER AT DIXON, IL | No flooding | 12.66 ft | 17,200 cfs |
| ROCK RIVER AT LATHAM PARK, IL | No flooding | 6.62 ft | — |
| ROCK RIVER AT ROCKTON, IL | No flooding | 6.72 ft | 7,830 cfs |
| SALT CREEK AT 22ND STREET AT OAK BROOK, IL | No flooding | 50.67 ft | — |
| SALT CREEK AT ELK GROVE VILLAGE, IL | No flooding | 13.67 ft | 191 cfs |
| SALT CREEK AT ELMHURST, IL | No flooding | 6.79 ft | 316 cfs |
| SALT CREEK AT ROLLING MEADOWS, IL | No flooding | 3.52 ft | 106 cfs |
| SALT CREEK AT WESTERN SPRINGS, IL | No flooding | 5.27 ft | 750 cfs |
| SALT CREEK AT WOOD DALE, IL | No flooding | 8.90 ft | — |
| SALT CREEK NEAR GREENVIEW, IL | No flooding | 7.02 ft | 4,590 cfs |
| SANGAMON RIVER AT PETERSBURG, IL | No flooding | 13.37 ft | 7,090 cfs |
| SANGAMON RIVER AT RIVERTON, IL | No flooding | 14.18 ft | 5,250 cfs |
| SANGAMON RIVER NEAR OAKFORD, IL | No flooding | 12.49 ft | 12,200 cfs |
| SAWMILL CREEK NEAR LEMONT, IL | No flooding | 10.18 ft | 160 cfs |
| SKILLET FORK AT WAYNE CITY, IL | No flooding | 5.20 ft | 29 cfs |
| SKOKIE RIVER AT LAKE FOREST, IL | No flooding | 2.48 ft | 27 cfs |
| SKOKIE RIVER NEAR HIGHLAND PARK, IL | No flooding | 4.48 ft | 85 cfs |
| SOUTH BRANCH KISHWAUKEE RIVER AT DEKALB, IL | No flooding | 4.46 ft | 171 cfs |
| SOUTH BRANCH KISHWAUKEE RIVER NR FAIRDALE IL | No flooding | 4.57 ft | 1,000 cfs |
| SPOON RIVER AT LONDON MILLS, IL | No flooding | 10.19 ft | 3,260 cfs |
| SPOON RIVER AT SEVILLE, IL | No flooding | 18.02 ft | 7,010 cfs |
| SPRING BROOK AT 87TH STREET NEAR NAPERVILLE, IL | No flooding | 3.75 ft | 24 cfs |
| ST. JOSEPH CREEK AT ROUTE 34 AT LISLE, IL | No flooding | 5.79 ft | 96 cfs |
| STONY CREEK (WEST) NEAR WORTH, IL | No flooding | 28.21 ft | 343 cfs |
| SUGAR CREEK NEAR BLOOMINGTON, IL | No flooding | 1.31 ft | 76 cfs |
| TINLEY CREEK NEAR PALOS PARK, IL | No flooding | 3.39 ft | 74 cfs |
| TYLER CREEK AT ELGIN, IL | No flooding | 6.45 ft | 98 cfs |
| VERMILION RIVER AT PONTIAC, IL | No flooding | 9.49 ft | 4,080 cfs |
| VERMILION RIVER NEAR DANVILLE, IL | No flooding | 9.85 ft | 5,670 cfs |
| VERMILION RIVER NEAR LEONORE, IL | No flooding | 14.81 ft | 8,890 cfs |
| WAUBONSEE CREEK NEAR OSWEGO, IL | No flooding | 8.71 ft | 53 cfs |
| WELLER CREEK AT DES PLAINES, IL | No flooding | 1.44 ft | 21 cfs |
| WEST BRANCH DU PAGE RIVER NEAR NAPERVILLE, IL | No flooding | 5.83 ft | 493 cfs |
| WEST BRANCH DU PAGE RIVER NEAR WARRENVILLE, IL | No flooding | 9.56 ft | 580 cfs |
| WEST BRANCH DU PAGE RIVER NEAR WEST CHICAGO, IL | No flooding | 5.54 ft | 208 cfs |
| WF OF NB CHICAGO RIVER AT DEERFIELD, IL | No flooding | 8.36 ft | — |
| WF OF NB CHICAGO RIVER AT NORTHBROOK IL | No flooding | 2.30 ft | 93 cfs |
| BAY CREEK AT PITTSFIELD, IL | No current data | — | — |
| BIG CREEK NEAR BRYANT, IL | No current data | — | — |
| BIG MUDDY RIVER AT MURPHYSBORO, IL | No current data | — | — |
| BIG MUDDY RIVER NEAR MT. VERNON, IL | No current data | — | — |
| BIG MUDDY SUBIMPOUNDMENT NEAR WALTONVILLE, IL | No current data | — | — |
| BULL CREEK NEAR LIBERTYVILLE, IL | No current data | — | — |
| CALUMET HARBOR DISPOSAL FACILITY AT CHICAGO, IL | No current data | — | — |
| CALUMET SAG CHANNEL AT BLUE ISLAND, IL | No current data | — | — |
| CASEY FORK SUBIMPOUNDMENT NEAR BONNIE, IL | No current data | — | — |
| CHICAGO SANITARY AND SHIP CANAL AT LOCKPORT, IL | No current data | — | — |
| CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL | No current data | — | — |
| CHICAGO SS CANAL AT LOCKPORT CONTROLLING WORKS, IL | No current data | — | — |
| CLEAR CREEK NEAR JEISYVILLE, IL | No current data | — | — |
| CROOKED CREEK NEAR HOFFMAN, IL | No current data | — | — |
| DES PLAINES RIVER AT LOCKPORT, IL | No current data | — | — |
| DES PLAINES RIVER AT ROMEOVILLE, IL | No current data | — | — |
| DES PLAINES RIVER IN LOCK CHANNEL AT ROCKDALE, IL | No current data | — | — |
| EAST BUREAU CREEK NEAR BUREAU, IL | No current data | — | — |
| EDWARDS RIVER NEAR ORION, IL | No current data | — | — |
| EMIQUON LAKE OUTLET NEAR HAVANA, IL | No current data | — | — |
| EVELYN BRANCH NEAR BRYANT, IL | No current data | — | — |
| FLINT CREEK NEAR FOX RIVER GROVE, IL | No current data | — | — |
| FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL | No current data | — | — |
| FRANKLINVILLE CREEK AT FRANKLINVILLE, IL | No current data | — | — |
| HANSON GRAVEL PIT AT CULVERT NEAR MORRIS, IL | No current data | — | — |
| HASTINGS CREEK NEAR LINDENHURST, IL | No current data | — | — |
| HORSE CREEK NEAR KEENES, IL | No current data | — | — |
| ILLINOIS RIVER AT HARDIN, IL | No current data | — | — |
| INDIAN CREEK AT PRAIRIE VIEW, IL | No current data | — | — |
| INDIAN CREEK NEAR FAIRBURY, IL | No current data | — | — |
| JONATHAN CREEK NEAR SULLIVAN, IL | No current data | — | — |
| JUDYS BRANCH AT OAK LAWN EST AT GLEN CARBON, IL | No current data | — | — |
| JUDYS BRANCH AT RTE 157 AT GLEN CARBON, IL | No current data | — | — |
| KASKASKIA DITCH AT BONDVILLE, IL | No current data | — | — |
| KASKASKIA RIVER AT CHESTERVILLE, IL | No current data | — | — |
| KASKASKIA RIVER NEAR POSEY, IL | No current data | — | — |
| KEITH CREEK AT EIGHTH STREET AT ROCKFORD, IL | No current data | — | — |
| KICKAPOO CREEK AT 1320E ROAD NR CHARLESTON, IL | No current data | — | — |
| KICKAPOO CREEK AT 2100E ROAD NEAR BLOOMINGTON, IL | No current data | — | — |
| KICKAPOO CREEK TRIBUTARY NEAR BLOOMINGTON, IL | No current data | — | — |
| LICK CREEK NEAR WOODSIDE, IL | No current data | — | — |
| LITTLE CALUMET RIVER AT CALUMET PARK, IL | No current data | — | — |
| MACOUPIN CREEK AT HWY 108 NR CARLINVILLE, IL | No current data | — | — |
| MACOUPIN CREEK AT HWY 111 NR SUMMERVILLE, IL | No current data | — | — |
| MANITOU CREEK AT ROUND LAKE, IL | No current data | — | — |
| MARLEY CREEK AT MARLEY, IL | No current data | — | — |
| MARROWBONE CREEK NEAR BETHANY, IL | No current data | — | — |
| MCKEE CREEK AT CHAMBERSBURG, IL | No current data | — | — |
| MCMAHON FEN RIVULET 9 NEAR PALOS HILLS, IL | No current data | — | — |
| MIDDLE FORK BIG MUDDY RIVER NEAR MACEDONIA, IL | No current data | — | — |
| NB CHICAGO RIVER AT ALBANY AVENUE AT CHICAGO, IL | No current data | — | — |
| NIPPERSINK CREEK BELOW WONDER LAKE, IL | No current data | — | — |
| NIPPERSINK CREEK NEAR GREENWOOD, IL | No current data | — | — |
| NORTH MILL CREEK AT HICKORY CORNERS, IL | No current data | — | — |
| NORTH MILL CREEK NEAR MILBURN, IL | No current data | — | — |
| OHIO RIVER AT METROPOLIS, IL | No current data | — | — |
| PANTHER CREEK NEAR EL PASO, IL | No current data | — | — |
| PIASA CREEK NEAR MELVILLE, IL | No current data | — | — |
| PLUM RIVER AT SAVANNA, IL | No current data | — | — |
| SALT CREEK AT BROOKFIELD, IL | No current data | — | — |
| SALT CREEK NEAR ELK GROVE VILLAGE, IL | No current data | — | — |
| SENACHWINE CREEK AT CHILLICOTHE, IL | No current data | — | — |
| SEWER AT GRISSOM SCHOOL AT HEGEWISCH, IL | No current data | — | — |
| SEWER AT MORRILL SCHOOL AT CHICAGO, IL | No current data | — | — |
| SLUG RUN NEAR BRYANT,IL | No current data | — | — |
| SPRING BK AT FOREST PRESERVE NR WARRENVILLE, IL | No current data | — | — |
| ST. JOSEPH CREEK AT LISLE, IL | No current data | — | — |
| SUGAR CREEK NEAR CHATHAM, IL | No current data | — | — |
| SUMMIT CONDUIT AT SUMMIT, IL | No current data | — | — |
| SUMMIT CONDUIT OUTFALL AT SUMMIT, IL | No current data | — | — |
| UNNAMED TR TO SB KISHWAUKEE C NR HUNTLEY, IL | No current data | — | — |
| APPLE RIVER NEAR HANOVER, IL | No flood stage defined | 4.63 ft | 436 cfs |
| BEAR CREEK NEAR MARCELLINE, IL | No flood stage defined | 6.13 ft | 1,040 cfs |
| BIG MUDDY RIVER BELOW REND LAKE NR BENTON, IL | No flood stage defined | 8.93 ft | 179 cfs |
| BLACK SLOUGH AT CR 500N NR PHILO, IL | No flood stage defined | 7.39 ft | 14 cfs |
| BONEYARD CREEK AT LINCOLN AVE AT URBANA, IL | No flood stage defined | 7.59 ft | 7 cfs |
| BONEYARD CREEK AT URBANA, IL | No flood stage defined | 10.69 ft | 6 cfs |
| BONEYARD CREEK BELOW 6TH STREET AT CHAMPAIGN, IL | No flood stage defined | 11.52 ft | — |
| BONPAS CREEK AT BROWNS, IL | No flood stage defined | 2.18 ft | 25 cfs |
| CACHE RIVER AT FORMAN, IL | No flood stage defined | 9.26 ft | 39 cfs |
| CAHOKIA CREEK AT EDWARDSVILLE, IL | No flood stage defined | 4.08 ft | 132 cfs |
| CASEY FORK AT MOUNT VERNON, IL | No flood stage defined | 1.58 ft | 4 cfs |
| CHICAGO RIVER AT CHICAGO LOCK AT CHICAGO, IL | No flood stage defined | -2.54 ft | — |
| CHICAGO SANITARY AND SHIP CANAL AT LEMONT, IL | No flood stage defined | 24.48 ft | — |
| CLINTON LAKE NEAR LANE, IL | No flood stage defined | 691.51 ft | — |
| COPPER SLOUGH AT CHAMPAIGN, IL | No flood stage defined | 9.99 ft | 6 cfs |
| CRAB ORCHARD CREEK NEAR MARION, IL | No flood stage defined | 0.75 ft | 1 cfs |
| EAST FORK KASKASKIA RIVER NEAR SANDOVAL, IL | No flood stage defined | 4.07 ft | 50 cfs |
| EAST FORK SHOAL CREEK NEAR COFFEEN, IL | No flood stage defined | 2.78 ft | 13 cfs |
| ELIZABETH LAKE DRAIN NR TWIN LAKES, WI-IL | No flood stage defined | 794.00 ft | — |
| ELKHORN CREEK NEAR PENROSE, IL | No flood stage defined | 4.10 ft | 273 cfs |
| FARM CREEK AT FARMDALE, IL | No flood stage defined | 1.20 ft | 0 cfs |
| FONDULAC CREEK NEAR EAST PEORIA, IL | No flood stage defined | 2.38 ft | 5 cfs |
| FOX RIVER AT SOUTH ELGIN, IL (TAILWATER) | No flood stage defined | 7.49 ft | — |
| FOX RIVER BYPASS AT YORKVILLE, IL | No flood stage defined | 10.12 ft | — |
| FOX RIVER NEAR MCHENRY, IL | No flood stage defined | 3.99 ft | — |
| FOX RIVER TAILWATER AT YORKVILLE, IL | No flood stage defined | 8.81 ft | — |
| HICKORY CREEK NEAR BROWNSTOWN, IL | No flood stage defined | 4.75 ft | 11 cfs |
| HURRICANE CREEK NEAR MULBERRY GROVE, IL | No flood stage defined | 4.08 ft | 51 cfs |
| ILLINOIS RIVER AT COPPERAS CREEK, IL | No flood stage defined | 14.50 ft | — |
| ILLINOIS RIVER AT FLORENCE, IL | No flood stage defined | 24.84 ft | — |
| ILLINOIS RIVER AT KINGSTON MINES, IL | No flood stage defined | 15.52 ft | 40,900 cfs |
| INDIAN CREEK AT WANDA, IL | No flood stage defined | 0.94 ft | 12 cfs |
| INDIAN CREEK NEAR WYOMING, IL | No flood stage defined | 11.73 ft | 202 cfs |
| KASKASKIA RIVER AT COOKS MILLS, IL | No flood stage defined | 10.75 ft | 1,980 cfs |
| KASKASKIA RIVER BELOW FICKLIN, IL | No flood stage defined | 5.64 ft | 326 cfs |
| KASKASKIA RIVER INFLOW AT FICKLIN, IL | No flood stage defined | 7.09 ft | — |
| KASKASKIA RIVER NEAR RED BUD, IL | No flood stage defined | 71.90 ft | — |
| KASKASKIA RIVER NEAR VENEDY STATION, IL | No flood stage defined | 13.29 ft | 5,410 cfs |
| KICKAPOO CREEK AT WAYNESVILLE, IL | No flood stage defined | 5.59 ft | 589 cfs |
| KICKAPOO CREEK NEAR BLOOMINGTON, IL | No flood stage defined | 4.77 ft | 78 cfs |
| LAKE FORK AT ATWOOD, IL | No flood stage defined | 8.68 ft | 583 cfs |
| LAKE FORK NEAR CORNLAND, IL | No flood stage defined | 6.88 ft | 344 cfs |
| LICK CREEK NEAR CHATHAM, IL | No flood stage defined | 18.10 ft | 177 cfs |
| LITTLE CROOKED CREEK NEAR NEW MINDEN, IL | No flood stage defined | 5.02 ft | 4 cfs |
| LITTLE KICKAPOO CREEK NEAR HEYWORTH, IL | No flood stage defined | 4.00 ft | 60 cfs |
| LITTLE WABASH RIVER AT CARMI, IL | No flood stage defined | 8.68 ft | 2,260 cfs |
| LITTLE WABASH RIVER NEAR GOLDEN GATE, IL | No flood stage defined | 17.38 ft | — |
| LUSK CREEK NEAR EDDYVILLE, IL | No flood stage defined | 2.51 ft | 4 cfs |
| MACKINAW RIVER NEAR GREEN VALLEY, IL | No flood stage defined | 23.29 ft | 7,910 cfs |
| MACKINAW RIVER NEAR HUDSON, IL | No flood stage defined | 23.81 ft | — |
| MACOUPIN CREEK NEAR KANE, IL | No flood stage defined | 6.17 ft | 393 cfs |
| MASON TAZEWELL DRAINAGE D AT CR2350E NR TOPEKA, IL | No flood stage defined | 16.35 ft | 159 cfs |
| MASON TAZEWELL DRAINAGE D NR NURSERY NR TOPEKA, IL | No flood stage defined | 463.01 ft | — |
| MIDDLE FORK SALINE RIVER NEAR HARRISBURG, IL | No flood stage defined | 9.37 ft | — |
| MILL CREEK AT MILAN, IL | No flood stage defined | 2.85 ft | 128 cfs |
| MONEY CREEK NEAR TOWANDA, IL | No flood stage defined | 17.56 ft | 174 cfs |
| NORTH FORK SALT CREEK NEAR DE WITT, IL | No flood stage defined | 693.37 ft | 295 cfs |
| RAYSE CREEK NEAR WALTONVILLE, IL | No flood stage defined | 0.93 ft | 1 cfs |
| RICHLAND CREEK NEAR HECKER, IL | No flood stage defined | 28.33 ft | 54 cfs |
| ROBINSON CREEK NEAR SHELBYVILLE, IL | No flood stage defined | 2.72 ft | 55 cfs |
| ROCK RIVER ABOVE SINNISSIPPI DAM AT ROCK FALLS, IL | No flood stage defined | 6.65 ft | — |
| SALINE BRANCH ABOVE 1700E NEAR URBANA, IL | No flood stage defined | 1.43 ft | 191 cfs |
| SALT CREEK AT HIGGINS RD NR ELK GROVE VILLAGE, IL | No flood stage defined | 5.57 ft | — |
| SALT CREEK NEAR FARMER CITY, IL | No flood stage defined | 692.29 ft | 249 cfs |
| SALT FORK NEAR ST. JOSEPH, IL | No flood stage defined | 5.43 ft | 219 cfs |
| SANGAMON RIVER AT FISHER, IL | No flood stage defined | 13.14 ft | 952 cfs |
| SANGAMON RIVER AT ROUTE 48 AT DECATUR, IL | No flood stage defined | 8.51 ft | 1,640 cfs |
| SANGAMON RIVER NEAR SPRINGFIELD, IL | No flood stage defined | 30.87 ft | — |
| SHOAL CREEK NEAR BREESE, IL | No flood stage defined | 10.66 ft | 1,580 cfs |
| SHOAL CREEK NEAR PIERRON, IL | No flood stage defined | 49.18 ft | 978 cfs |
| SILVER CREEK AT ROUTE 161 NR MASCOUTAH, IL | No flood stage defined | 13.00 ft | — |
| SILVER CREEK NEAR FREEBURG, IL | No flood stage defined | 7.29 ft | 1,390 cfs |
| SILVER CREEK NEAR TROY, IL | No flood stage defined | 6.18 ft | 128 cfs |
| SINSINAWA RIVER NEAR MENOMINEE, IL | No flood stage defined | 5.21 ft | 68 cfs |
| SIXMILE CREEK AT HUDSON, IL | No flood stage defined | 12.94 ft | 75 cfs |
| SOUTH FORK SALINE RIVER NR CARRIER MILLS, IL | No flood stage defined | 2.62 ft | 28 cfs |
| SOUTH FORK SANGAMON RIVER BELOW ROCHESTER, IL | No flood stage defined | 14.62 ft | — |
| SOUTH FORK SANGAMON RIVER NEAR ROCHESTER, IL | No flood stage defined | 14.66 ft | 1,430 cfs |
| SPOON RIVER NEAR ST. JOSEPH, IL | No flood stage defined | 6.43 ft | 86 cfs |
| SPRING CREEK AT SPRINGFIELD, IL | No flood stage defined | 4.59 ft | 274 cfs |
| SUGAR CREEK AT COVERED BRIDGE RD NR CHATHAM, IL | No flood stage defined | 19.82 ft | 68 cfs |
| SUGAR CREEK NEAR AVISTON, IL | No flood stage defined | 2.79 ft | 10 cfs |
| SUGAR CREEK NEAR SPRINGFIELD, IL | No flood stage defined | 14.89 ft | 657 cfs |
| WEST OKAW RIVER NEAR LOVINGTON, IL | No flood stage defined | 8.16 ft | 438 cfs |
| WHITLEY CREEK NEAR ALLENVILLE, IL | No flood stage defined | 4.09 ft | 51 cfs |