Upper Midwest Environmental Sciences Center
![](../../../../images/icons/folder.gif)
![](../../../../images/icons/tree_f.gif)
Figure 4. | Concentrations (mg/L) of nitrate + nitrite above (red dots) and below (black line) La Grange Pool of the Illinois River, 19931999. |
![Concentrations of nitrate + nitrite](figures/figure04.gif)
Page Last Modified: April 17, 2018
Figure 4. | Concentrations (mg/L) of nitrate + nitrite above (red dots) and below (black line) La Grange Pool of the Illinois River, 19931999. |