The data for Polk County are summarized in this water planning data fact sheet. Polk County is located in central Iowa.
Service is the principal economic sector, as measured by employee earnings.
The county contains gently rolling hills, the Des Moines and Raccoon River Valleys, Saylorville Reservoir, and small drainage streams. The population of 327,140 is distributed in 17 incorporated cities and the surrounding rural areas. Interstate Highways 80 and 235 cross the county from east to west. Interstate Highway 35 crosses the county from north to south. This data sheet focuses on water uses that withdraw water from ground and surface water sources.