| 03336890 | SPOON RIVER NEAR ST. JOSEPH, IL | 07/26 17:45 CST | -- | -- | -- | -- | 1.1 |
| 03338780 | NORTH FORK VERMILION RIVER NEAR BISMARCK, IL | 07/26 17:15 CST | -- | -- | -- | -- | 3.2 |
| 03339000 | VERMILION RIVER NEAR DANVILLE, IL | 07/26 17:45 CST | -- | -- | -- | -- | 3.7 |
| | (YSI) | 07/26 17:45 CST | -- | -- | *** | -- | -- |
| 03346500 | EMBARRAS RIVER AT LAWRENCEVILLE, IL | 07/26 17:00 CST | -- | -- | -- | -- | 2.0 |
| | | 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 | 07/26 17:00 CST | -- | -- | -- | -- | 1.2 |
| 03612600 | OHIO RIVER AT OLMSTED, IL | 07/26 19:00 CDT | 7.6 | 294 | 29.1 | 5.4 | 1.43 |
| 05420400 | MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, IL | 07/26 17:15 CST | 8.2 | 462 | 27.0 | 8.1 | -- |
| | [Nitratax] | 07/26 17:15 CST | -- | -- | -- | -- | 2.75 |
| 05440700 | ROCK RIVER AT BYRON, IL | 07/26 17:15 CST | -- | -- | 25.0 | -- | -- |
| 05446500 | ROCK RIVER NEAR JOSLIN, IL | 07/26 17:00 CST | -- | -- | -- | -- | 2.9 |
| | | 12/18 11:30 CST | -- | -- | 1.1 | -- | -- |
| 05447500 | GREEN RIVER NEAR GENESEO, IL | 07/26 17:00 CST | -- | -- | -- | -- | 2.5 |
| | | 05/03 20:00 CST | -- | -- | Eqp | -- | -- |
| 05527000 | KANKAKEE RIVER AT CUSTER PARK, IL | 07/26 17:15 CST | -- | -- | 25.4 | -- | -- |
| 05527500 | KANKAKEE RIVER NEAR WILMINGTON, IL | 07/26 17:45 CST | -- | -- | 26.1 | -- | -- |
| 05536137 | CHICAGO S & S CANAL AT WESTERN AVE AT CHICAGO, IL |
| | BOTTOM (10 FT) | 07/26 17:50 CST | -- | 515 | 25.1 | -- | -- |
| | MIDDLE (6 FT) | 07/26 17:50 CST | -- | 941 | 25.0 | -- | -- |
| | TOP (2 FT) | 07/26 17:50 CST | -- | 571 | 25.1 | -- | -- |
| 05536368 | CALUMET SAG CHANNEL AT BLUE ISLAND, IL | 07/26 17:00 CST | -- | -- | 24.7 | -- | -- |
| 05536995 | CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL |
| | P1 | 07/26 17:00 CST | -- | 729 | 24.9 | -- | -- |
| | P2 | 07/26 17:00 CST | -- | 1,130 | 24.9 | -- | -- |
| | P3 | 07/26 17:00 CST | -- | 728 | 24.9 | -- | -- |
| | P4 | 07/26 17:00 CST | -- | 638 | 25.0 | -- | -- |
| 05537980 | DES PLAINES RIVER AT ROUTE 53 AT JOLIET, IL | 07/26 17:30 CST | 7.8 | 721 | 25.6 | 9.2 | 3.8 |
| 05538020 | DES PLAINES RIVER IN LOCK CHANNEL AT ROCKDALE, IL | 07/26 16:45 CST | 7.5 | 727 | 25.2 | 8.5 | -- |
| | [CO2] | 07/23 12:15 CST | -- | -- | *** | -- | -- |
| 05539670 | DES PLAINES RIVER AT CHANNAHON, IL |
| | CS | 07/26 18:00 CST | -- | 754 | 26.2 | -- | -- |
| 05543010 | ILLINOIS RIVER AT SENECA, IL | 07/26 17:45 CST | -- | -- | -- | -- | 3.4 |
| | | 07/26 12:00 CST | 7.9 | 667 | 26.3 | 7.5 | -- |
| 05549400 | FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL | 07/26 17:00 CST | -- | -- | 26.2 | -- | -- |
| 05549500 | FOX RIVER NEAR MCHENRY, IL | 07/26 16:45 CST | 8.0 | 703 | 26.5 | 7.8 | -- |
| 05553700 | ILLINOIS RIVER AT STARVED ROCK, IL |
| | BN | 07/26 17:00 CST | 8.1 | 677 | 27.2 | 9.2 | 2.44 |
| | SHD | 04/12 12:45 CST | 8.3 | 887 | Dis | 11.4 | -- |
| 05558300 | ILLINOIS RIVER AT HENRY, IL |
| | YSI | 07/26 17:45 CST | 8.3 | 627 | 28.0 | 9.6 | -- |
| 05559900 | ILLINOIS RIVER ABOVE RTE 150 AT PEORIA, IL | 07/26 17:30 CST | 7.8 | 637 | 27.7 | 6.0 | 2.6 |
| 05567500 | MACKINAW RIVER NEAR CONGERVILLE, IL | 07/26 17:00 CST | 8.4 | 687 | 26.2 | 8.9 | 2.3 |
| 05568705 | MASON TAZEWELL DRAINAGE D AT CR2350E NR TOPEKA, IL | 07/26 18:00 CST | 8.1 | 671 | 23.2 | 7.8 | 1.05 |
| 05578100 | SALT CREEK NEAR FARMER CITY, IL | 07/26 17:30 CST | -- | -- | 29.3 | -- | -- |
| | | 07/08 08:30 CST | -- | Dis | -- | -- | -- |
| 05578250 | NORTH FORK SALT CREEK NEAR DE WITT, IL | 07/26 17:30 CST | -- | -- | 24.6 | -- | -- |
| | | 07/23 16:30 CST | -- | 609 | -- | -- | -- |
| 05586300 | ILLINOIS RIVER AT FLORENCE, IL | 07/26 17:30 CST | -- | -- | 28.2 | -- | 2.6 |
| | [YSI] | 07/26 17:30 CST | 7.8 | 542 | -- | 6.2 | -- |
| 05595000 | KASKASKIA RIVER AT NEW ATHENS, IL | 07/26 17:00 CST | -- | -- | -- | -- | 0.6 |
| 05599490 | BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL | 07/26 17:00 CST | -- | -- | -- | -- | 0.4 |
| 401913089534501 | 22N7W-28.5a (IL Tree Nursery) | 07/26 17:30 CST | 7.5 | 622 | 13.2 | 2.5 | 14.7 |
| 412320088154101 | KANKAKEE R AT INFLOW OF POWER PLANT NR LORENZO, IL | 07/26 18:00 CST | -- | -- | 25.0 | -- | -- |
| 413339087223001 | LITTLE CALUMET RIVER AT BURR STREET AT GARY, IN | 07/26 18:15 EST | -- | -- | 22.6 | -- | -- |
| 422308088195601 | 45N8E-17.7h1 (9-MCH-S) | 07/26 18:00 CST | -- | -- | Dis | -- | -- |
| 422848088191001 | 46N8E-08.2e1 (4-RCH-S) | 07/26 17:30 CST | -- | -- | Dis | -- | -- |
| 423784088133401 | Long Lake at BEN Dock at Long Lake, IL | 04/23 12:15 CST | 10.0 | -- | 16.9 | 9.1 | -- |
| | | 10/23 12:15 CST | -- | 862 | -- | -- | -- |
Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data
starting March 11, 2024 