| 03336890 | SPOON RIVER NEAR ST. JOSEPH, IL | 04/25 17:45 CST | -- | -- | -- | -- | 12.8 |
| 03338780 | NORTH FORK VERMILION RIVER NEAR BISMARCK, IL | 04/25 18:15 CST | -- | -- | -- | -- | 15.5 |
| 03339000 | VERMILION RIVER NEAR DANVILLE, IL | 04/25 18:15 CST | -- | -- | -- | -- | 10.4 |
| | (YSI) | 04/25 18:15 CST | -- | -- | 14.0 | -- | -- |
| 03346500 | EMBARRAS RIVER AT LAWRENCEVILLE, IL | 04/25 18:00 CST | -- | -- | -- | -- | 5.6 |
| | | 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 | 04/25 10:00 CST | -- | -- | -- | -- | 0.9 |
| 03612600 | OHIO RIVER AT OLMSTED, IL | 04/25 19:00 CDT | 7.6 | 316 | 16.5 | 7.4 | 1.45 |
| 05420400 | MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, IL | 04/25 18:15 CST | 8.8 | 433 | 13.8 | 14.4 | -- |
| | [Nitratax] | 04/25 18:15 CST | -- | -- | -- | -- | 1.80 |
| 05440700 | ROCK RIVER AT BYRON, IL | 04/25 18:15 CST | -- | -- | 14.2 | -- | -- |
| 05446500 | ROCK RIVER NEAR JOSLIN, IL | 04/25 18:00 CST | -- | -- | -- | -- | 4.2 |
| | | 12/18 11:30 CST | -- | -- | 1.1 | -- | -- |
| 05447500 | GREEN RIVER NEAR GENESEO, IL | 04/25 18:00 CST | -- | -- | -- | -- | 5.8 |
| | | 05/03 20:00 CST | -- | -- | Eqp | -- | -- |
| 05527000 | KANKAKEE RIVER AT CUSTER PARK, IL | 04/25 18:15 CST | -- | -- | 13.3 | -- | -- |
| 05527500 | KANKAKEE RIVER NEAR WILMINGTON, IL | 04/25 17:45 CST | -- | -- | 14.0 | -- | -- |
| 05536137 | CHICAGO S & S CANAL AT WESTERN AVE AT CHICAGO, IL |
| | BOTTOM (10 FT) | 04/25 18:10 CST | -- | 931 | 13.6 | -- | -- |
| | MIDDLE (6 FT) | 04/25 18:10 CST | -- | 930 | 13.5 | -- | -- |
| | TOP (2 FT) | 04/25 18:10 CST | -- | 1,020 | 13.5 | -- | -- |
| 05536368 | CALUMET SAG CHANNEL AT BLUE ISLAND, IL | 04/25 18:00 CST | -- | -- | 13.7 | -- | -- |
| 05536995 | CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL |
| | P1 | 04/25 18:00 CST | -- | 1,020 | 14.6 | -- | -- |
| | P2 | 04/25 18:00 CST | -- | 1,060 | 14.7 | -- | -- |
| | P3 | 04/25 18:00 CST | -- | 917 | 14.6 | -- | -- |
| | P4 | 04/25 18:00 CST | -- | 1,030 | 14.6 | -- | -- |
| 05537980 | DES PLAINES RIVER AT ROUTE 53 AT JOLIET, IL | 04/25 18:00 CST | 8.3 | 1,130 | 15.3 | 13.5 | 5.8 |
| 05538020 | DES PLAINES RIVER IN LOCK CHANNEL AT ROCKDALE, IL | 04/25 17:45 CST | 8.1 | 1,070 | 14.4 | 11.6 | -- |
| | [CO2] | 04/25 18:45 CST | -- | -- | *** | -- | -- |
| 05539670 | DES PLAINES RIVER AT CHANNAHON, IL |
| | CS | 04/25 18:00 CST | -- | 1,090 | 16.6 | -- | -- |
| 05543010 | ILLINOIS RIVER AT SENECA, IL | 04/25 17:45 CST | 8.2 | 758 | 14.2 | 10.6 | 5.2 |
| 05549400 | FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL | 04/25 18:00 CST | -- | -- | 13.9 | -- | -- |
| 05549500 | FOX RIVER NEAR MCHENRY, IL | 04/25 18:00 CST | 8.6 | 882 | 14.5 | 13.2 | -- |
| 05553700 | ILLINOIS RIVER AT STARVED ROCK, IL |
| | BN | 04/25 18:00 CST | 8.4 | 800 | 14.5 | 11.4 | 3.54 |
| | SHD | 04/12 12:45 CST | 8.3 | 887 | Dis | 11.4 | -- |
| 05558300 | ILLINOIS RIVER AT HENRY, IL |
| | YSI | 04/25 17:45 CST | 8.6 | 736 | 15.3 | 14.1 | -- |
| 05559900 | ILLINOIS RIVER ABOVE RTE 150 AT PEORIA, IL | 04/25 18:00 CST | 8.6 | 725 | 15.5 | 11.8 | 4.6 |
| 05567500 | MACKINAW RIVER NEAR CONGERVILLE, IL | 04/25 18:00 CST | 8.5 | 643 | 14.0 | 12.7 | 8.9 |
| 05568705 | MASON TAZEWELL DRAINAGE D AT CR2350E NR TOPEKA, IL | 04/25 18:00 CST | 8.1 | 655 | 15.5 | 10.2 | 0.74 |
| 05578100 | SALT CREEK NEAR FARMER CITY, IL | 04/25 17:30 CST | -- | Dis | 14.4 | -- | -- |
| 05578250 | NORTH FORK SALT CREEK NEAR DE WITT, IL | 04/25 17:30 CST | -- | -- | 12.9 | -- | -- |
| | | 07/23 16:30 CST | -- | 609 | -- | -- | -- |
| 05586300 | ILLINOIS RIVER AT FLORENCE, IL | 04/25 18:15 CST | -- | -- | 14.8 | -- | 4.7 |
| | [YSI] | 04/25 18:15 CST | 8.3 | 603 | -- | 10.9 | -- |
| 05595000 | KASKASKIA RIVER AT NEW ATHENS, IL | 04/25 18:00 CST | -- | -- | -- | -- | 1.2 |
| 05599490 | BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL | 04/25 18:00 CST | -- | -- | -- | -- | 1.1 |
| 401913089534501 | 22N7W-28.5a (IL Tree Nursery) | 04/25 18:30 CST | 7.6 | 525 | 13.2 | 3.2 | 12.3 |
| 412320088154101 | KANKAKEE R AT INFLOW OF POWER PLANT NR LORENZO, IL | 04/25 18:00 CST | -- | -- | 13.5 | -- | -- |
| 413339087223001 | LITTLE CALUMET RIVER AT BURR STREET AT GARY, IN | 04/25 19:15 EST | -- | -- | 13.3 | -- | -- |
| 422308088195601 | 45N8E-17.7h1 (9-MCH-S) | 04/25 18:00 CST | -- | -- | Dis | -- | -- |
| 422848088191001 | 46N8E-08.2e1 (4-RCH-S) | 04/25 18:30 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 