| 03336890 | SPOON RIVER NEAR ST. JOSEPH, IL | 11/26 09:45 CST | -- | -- | -- | -- | 4.9 |
| 03338780 | NORTH FORK VERMILION RIVER NEAR BISMARCK, IL | 12/27 20:15 CST | -- | -- | -- | -- | 4.6 |
| 03339000 | VERMILION RIVER NEAR DANVILLE, IL | 12/27 19:45 CST | -- | -- | -- | -- | 4.4 |
| | (YSI) | 10/04 10:30 CST | -- | -- | 17.6 | -- | -- |
| 03346500 | EMBARRAS RIVER AT LAWRENCEVILLE, IL | 12/27 20:00 CST | -- | -- | -- | -- | *** |
| | | 10/19 09:45 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 | 12/27 20:00 CST | -- | -- | -- | -- | 1.8 |
| 03612600 | OHIO RIVER AT OLMSTED, IL | 12/27 20:00 CST | 7.7 | 351 | 7.5 | 11.2 | 1.22 |
| 05420400 | MISSISSIPPI RIVER AT DAM 13 NEAR FULTON, IL | 12/23 12:15 CST | -- | 1,310 | -- | 0.0 | -- |
| | | 12/23 12:00 CST | 8.5 | -- | 0.1 | -- | -- |
| | [Nitratax] | 12/23 12:15 CST | -- | -- | -- | -- | 1.87 |
| 05440700 | ROCK RIVER AT BYRON, IL | 12/27 20:15 CST | -- | -- | 3.5 | -- | -- |
| 05446500 | ROCK RIVER NEAR JOSLIN, IL | 12/27 20:00 CST | -- | -- | -- | -- | Ssn |
| | | 12/18 11:30 CST | -- | -- | 1.1 | -- | -- |
| 05447500 | GREEN RIVER NEAR GENESEO, IL | 12/27 20:00 CST | -- | -- | -- | -- | Ssn |
| | | 05/03 20:00 CST | -- | -- | Eqp | -- | -- |
| 05527000 | KANKAKEE RIVER AT CUSTER PARK, IL | 12/27 20:15 CST | -- | -- | 4.7 | -- | -- |
| 05527500 | KANKAKEE RIVER NEAR WILMINGTON, IL | 12/27 19:45 CST | -- | -- | 4.9 | -- | -- |
| 05536137 | CHICAGO S & S CANAL AT WESTERN AVE AT CHICAGO, IL |
| | BOTTOM (10 FT) | 10/21 14:30 CST | -- | 629 | 16.5 | -- | -- |
| | MIDDLE (6 FT) | 10/21 14:30 CST | -- | 661 | 16.5 | -- | -- |
| | TOP (2 FT) | 10/21 14:30 CST | -- | 636 | 16.5 | -- | -- |
| 05536995 | CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, IL |
| | P1 | 12/27 20:00 CST | -- | 1,370 | 7.9 | -- | -- |
| | P2 | 12/27 20:00 CST | -- | 1,420 | 7.9 | -- | -- |
| | P3 | 12/27 20:00 CST | -- | 1,280 | 7.8 | -- | -- |
| | P4 | 12/27 20:00 CST | -- | 1,330 | 7.8 | -- | -- |
| 05537980 | DES PLAINES RIVER AT ROUTE 53 AT JOLIET, IL | 12/27 20:00 CST | 7.4 | 1,160 | 7.2 | 11.3 | 9.3 |
| 05538020 | DES PLAINES RIVER IN LOCK CHANNEL AT ROCKDALE, IL | 10/15 13:15 CST | Dis | -- | -- | -- | -- |
| | | 10/15 12:45 CST | -- | Dis | -- | -- | -- |
| | | 10/15 12:15 CST | -- | -- | Dis | Dis | -- |
| | [CO2] | 10/16 10:00 CST | -- | -- | *** | -- | -- |
| 05539670 | DES PLAINES RIVER AT CHANNAHON, IL |
| | CS | 12/27 20:00 CST | -- | 1,170 | 7.3 | -- | -- |
| 05543010 | ILLINOIS RIVER AT SENECA, IL | 12/27 19:45 CST | 8.4 | 946 | 3.5 | 14.6 | 4.6 |
| 05549400 | FOX RIVER AT MILLER BRIDGE NEAR MCHENRY, IL | 12/27 20:00 CST | -- | -- | 3.2 | -- | -- |
| 05549500 | FOX RIVER NEAR MCHENRY, IL | 11/19 14:03 CST | 8.2 | Ssn | 11.3 | Ssn | -- |
| 05553700 | ILLINOIS RIVER AT STARVED ROCK, IL |
| | BN | 12/27 20:00 CST | 8.4 | 976 | 3.5 | 14.8 | 4.58 |
| | SHD | 04/12 12:45 CST | 8.3 | 887 | Dis | 11.4 | -- |
| 05558300 | ILLINOIS RIVER AT HENRY, IL |
| | YSI | 12/27 19:45 CST | 8.6 | 958 | 3.1 | 15.9 | -- |
| 05559900 | ILLINOIS RIVER ABOVE RTE 150 AT PEORIA, IL | 12/27 20:00 CST | -- | 967 | 4.5 | 15.5 | 3.8 |
| | | 12/21 02:30 CST | Eqp | -- | -- | -- | -- |
| 05567500 | MACKINAW RIVER NEAR CONGERVILLE, IL | 12/16 09:00 CST | Ssn | Ssn | -- | Ssn | Ssn |
| | | 11/25 12:45 CST | -- | -- | Ssn | -- | -- |
| 05568705 | MASON TAZEWELL DRAINAGE D AT CR2350E NR TOPEKA, IL | 12/27 20:00 CST | 7.9 | 632 | 10.6 | 9.0 | 0.76 |
| 05578100 | SALT CREEK NEAR FARMER CITY, IL | 12/27 19:30 CST | -- | -- | 8.5 | -- | -- |
| | | 07/08 08:30 CST | -- | Dis | -- | -- | -- |
| 05578250 | NORTH FORK SALT CREEK NEAR DE WITT, IL | 12/27 19:30 CST | -- | -- | 5.8 | -- | -- |
| | | 07/23 16:30 CST | -- | 609 | -- | -- | -- |
| 05586300 | ILLINOIS RIVER AT FLORENCE, IL | 12/27 19:45 CST | -- | -- | 3.3 | -- | 2.9 |
| | [YSI] | 12/27 19:45 CST | 8.7 | 840 | -- | 14.3 | -- |
| 05587498 | Mississippi River Pool Lock and Dam 26 at Alton,IL | 12/27 20:00 CST | -- | -- | -- | -- | 2.4 |
| | | 11/09 15:30 CST | Eqp | Eqp | Eqp | Eqp | -- |
| 05595000 | KASKASKIA RIVER AT NEW ATHENS, IL | 12/27 19:45 CST | -- | -- | -- | -- | 0.7 |
| 05599490 | BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL | 12/27 21:00 CST | 7.6 | 553 | 7.1 | 11.2 | 0.6 |
| 401913089534501 | 22N7W-28.5a (IL Tree Nursery) | 12/27 19:30 CST | 7.4 | 573 | 14.5 | 3.9 | -- |
| | | 12/27 17:45 CST | -- | -- | -- | -- | 14.1 |
| 401934089541701 | 22N7W-29.1d1 (DP-1) | 12/27 19:30 CST | -- | -- | -- | -- | 0.0 |
| 401934089541702 | 22N7W-29.1d2 (SH-1) | 12/27 19:30 CST | -- | -- | -- | -- | 2.2 |
| 401934089541703 | 22N7W-29.1d3 (DP-2) | 12/27 20:00 CST | -- | 582 | 13.6 | -0.3 | -- |
| 401934089541704 | 22N7W-29.1d4 (SH-2) | 12/27 19:30 CST | -- | 524 | 12.5 | 2.0 | -- |
| 412320088154101 | KANKAKEE R AT INFLOW OF POWER PLANT NR LORENZO, IL | 12/27 20:00 CST | -- | -- | 3.9 | -- | -- |
| 413339087223001 | LITTLE CALUMET RIVER AT BURR STREET AT GARY, IN | 12/27 20:15 EST | -- | -- | 8.3 | -- | -- |
| 422308088195601 | 45N8E-17.7h1 (9-MCH-S) | 12/27 20:00 CST | -- | -- | Dis | -- | -- |
| 422848088191001 | 46N8E-08.2e1 (4-RCH-S) | 12/27 19:30 CST | -- | -- | Dis | -- | -- |
| 423784088133401 | Long Lake at BEN Dock at Long Lake, IL | 11/13 10:19 CST | 7.8 | 678 | 11.2 | 6.7 | -- |
Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data
starting March 11, 2024 