| 03336890 | SPOON RIVER NEAR ST. JOSEPH, IL | 05/08 14:45 CST | -- | -- | -- | -- | 10.2 |
| 03338780 | NORTH FORK VERMILION RIVER NEAR BISMARCK, IL | 05/08 14:15 CST | -- | -- | -- | -- | 11.0 |
| 03339000 | VERMILION RIVER NEAR DANVILLE, IL | 05/08 14:15 CST | -- | -- | -- | -- | 10.4 |
| | (YSI) | 05/08 14:15 CST | -- | -- | *** | -- | -- |
| 03346500 | EMBARRAS RIVER AT LAWRENCEVILLE, IL | 05/08 14:00 CST | -- | -- | -- | -- | 6.5 |
| | | 10/19 10:00 CST | -- | -- | 15.9 | -- | -- |
| 03381495 | LITTLE WABASH RIVER AT MAIN ST AT CARMI, IL | 07/18 23:45 CST | -- | -- | 28.0 | -- | -- |
| 03381500 | LITTLE WABASH RIVER AT CARMI, IL | 05/08 14:00 CST | -- | -- | -- | -- | 1.7 |
| 03612600 | OHIO RIVER AT OLMSTED, IL | 05/08 15:00 CDT | 7.7 | 315 | 21.7 | 7.5 | 1.66 |
| 05420400 | MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, IL | 05/08 14:15 CST | 8.4 | 406 | 19.1 | 10.3 | -- |
| | [Nitratax] | 05/08 14:15 CST | -- | -- | -- | -- | 2.61 |
| 05440700 | ROCK RIVER AT BYRON, IL | 05/08 14:15 CST | -- | -- | 19.1 | -- | -- |
| 05446500 | ROCK RIVER NEAR JOSLIN, IL | 05/08 14:00 CST | -- | -- | -- | -- | 3.3 |
| | | 12/18 11:30 CST | -- | -- | 1.1 | -- | -- |
| 05447500 | GREEN RIVER NEAR GENESEO, IL | 05/08 14:00 CST | -- | -- | -- | -- | 5.3 |
| | | 05/03 20:00 CST | -- | -- | Eqp | -- | -- |
| 05527000 | KANKAKEE RIVER AT CUSTER PARK, IL | 05/08 14:15 CST | -- | -- | 20.4 | -- | -- |
| 05527500 | KANKAKEE RIVER NEAR WILMINGTON, IL | 05/08 14:45 CST | -- | -- | 20.5 | -- | -- |
| 05536137 | CHICAGO S & S CANAL AT WESTERN AVE AT CHICAGO, IL |
| | BOTTOM (10 FT) | 05/08 14:30 CST | -- | 733 | 18.4 | -- | -- |
| | MIDDLE (6 FT) | 05/08 14:30 CST | -- | 741 | 18.3 | -- | -- |
| | TOP (2 FT) | 05/08 14:30 CST | -- | 715 | 18.4 | -- | -- |
| 05536368 | CALUMET SAG CHANNEL AT BLUE ISLAND, IL | 05/08 14:00 CST | -- | -- | 17.8 | -- | -- |
| 05536995 | CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL |
| | P1 | 05/08 14:00 CST | -- | 849 | 18.2 | -- | -- |
| | P2 | 05/08 14:00 CST | -- | 852 | 18.3 | -- | -- |
| | P3 | 05/08 14:00 CST | -- | 974 | 18.2 | -- | -- |
| | P4 | 05/08 14:00 CST | -- | 883 | 18.2 | -- | -- |
| 05537980 | DES PLAINES RIVER AT ROUTE 53 AT JOLIET, IL | 05/08 14:30 CST | 7.8 | 907 | 19.6 | 9.3 | 3.8 |
| 05538020 | DES PLAINES RIVER IN LOCK CHANNEL AT ROCKDALE, IL | 05/08 13:45 CST | 7.6 | 886 | 19.1 | 9.4 | -- |
| | [CO2] | 05/08 14:45 CST | -- | -- | *** | -- | -- |
| 05539670 | DES PLAINES RIVER AT CHANNAHON, IL |
| | CS | 05/08 14:00 CST | -- | 795 | 20.3 | -- | -- |
| 05543010 | ILLINOIS RIVER AT SENECA, IL | 05/08 14:45 CST | 7.8 | 712 | 20.3 | 8.6 | 4.9 |
| 05549400 | FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL | 05/08 14:00 CST | -- | -- | 20.5 | -- | -- |
| 05549500 | FOX RIVER NEAR MCHENRY, IL | 05/08 14:00 CST | 8.3 | 814 | 21.0 | 10.9 | -- |
| 05553700 | ILLINOIS RIVER AT STARVED ROCK, IL |
| | BN | 05/08 14:00 CST | 8.1 | 773 | 20.8 | 8.7 | 3.74 |
| | SHD | 04/12 12:45 CST | 8.3 | 887 | Dis | 11.4 | -- |
| 05558300 | ILLINOIS RIVER AT HENRY, IL |
| | YSI | 05/08 14:45 CST | 8.0 | 708 | 20.7 | -- | -- |
| | | 05/02 05:00 CST | -- | -- | -- | *** | -- |
| 05559900 | ILLINOIS RIVER ABOVE RTE 150 AT PEORIA, IL | 05/08 14:30 CST | 7.8 | 635 | 20.9 | 4.0 | 6.1 |
| 05567500 | MACKINAW RIVER NEAR CONGERVILLE, IL | 05/08 14:00 CST | 8.1 | 630 | 17.5 | 8.6 | 10.4 |
| 05568705 | MASON TAZEWELL DRAINAGE D AT CR2350E NR TOPEKA, IL | 05/08 14:00 CST | 7.7 | 405 | 17.2 | 7.1 | 9.91 |
| 05578100 | SALT CREEK NEAR FARMER CITY, IL | 05/08 14:30 CST | -- | Dis | 16.6 | -- | -- |
| 05578250 | NORTH FORK SALT CREEK NEAR DE WITT, IL | 05/08 14:30 CST | -- | -- | 16.3 | -- | -- |
| | | 07/23 16:30 CST | -- | 609 | -- | -- | -- |
| 05586300 | ILLINOIS RIVER AT FLORENCE, IL | 05/08 14:30 CST | -- | -- | 20.0 | -- | 5.5 |
| | [YSI] | 05/08 14:30 CST | 7.6 | 515 | -- | 5.7 | -- |
| 05595000 | KASKASKIA RIVER AT NEW ATHENS, IL | 05/08 14:00 CST | -- | -- | -- | -- | 2.1 |
| 05599490 | BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL | 05/08 14:00 CST | -- | -- | -- | -- | 1.7 |
| 401913089534501 | 22N7W-28.5a (IL Tree Nursery) | 05/08 14:30 CST | 7.8 | 494 | 13.2 | 3.6 | 10.7 |
| 412320088154101 | KANKAKEE R AT INFLOW OF POWER PLANT NR LORENZO, IL | 05/08 14:00 CST | -- | -- | 20.2 | -- | -- |
| 413339087223001 | LITTLE CALUMET RIVER AT BURR STREET AT GARY, IN | 05/08 15:15 EST | -- | -- | 20.3 | -- | -- |
| 422308088195601 | 45N8E-17.7h1 (9-MCH-S) | 05/08 14:00 CST | -- | -- | Dis | -- | -- |
| 422848088191001 | 46N8E-08.2e1 (4-RCH-S) | 05/08 14:30 CST | -- | -- | Dis | -- | -- |
| 423784088133401 | Long Lake at BEN Dock at Long Lake, IL | 10/23 12:15 CST | 8.6 | 862 | -- | 10.1 | -- |
| | | 10/23 11:10 CST | -- | -- | 13.8 | -- | -- |
Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data
starting March 11, 2024 