Lowest and Highest Points in Du Page County

Lowest and Highest Points in Du Page County
Low Elevation: 
<580 feet above mean sea level
Low Place: 
Des Plaines River
Low Quad Name: 
Sag Bridge
Low PLSS: 
3-16-37N-11E
Low Geology: 
River valley cut into Silurian/Devonian dolomite
High Elevation: 
>820 feet above mean sea level
High Place: 
unnamed hilltop
High Quad Name: 
Lombard
High PLSS: 
3-28-40N-10E
High Geology: 
Kenneyville Moraine
Area: 
333.51 square miles
Total Relief: 
240 feet
Percent Slope: 
0.88%