How We Treat Your
Drinking Water
The municipal treatment plant utilizes a multi-step process. The first steps include coagulation of the silt and removal through sedimentation.
![[The Treatment Process]](treatment.gif)
Next, the water is filtered and chlorine and fluoride are added to meet the State and Federal drinking water quality standards. The water is then held in a finished water storage tank where it is readily available to be transferred to the water distribution system or ground storage tanks upon demand to your faucets and fire hydrants.
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Source Water Map:
Where does my water come from?
The primary source of water for the City of Iowa City is the Iowa River. The intake is located at the treatment plant at 330 North Madison Street. When additional capacity or dilution is needed, Iowa City utilizes water from one Jordan aquifer at a depth of approximately 1600 feet. Two Silurian aquifer wells also provide water from a depth of approximately 400 feet. The Jordan and Silurian wells are located adjacent to the treatment plant.
A source water assessment is to be completed in 1999 for the Iowa River watershed. The Iowa River flows southeasterly
![[Iowa Water Map]](iowamap.gif)
across Iowa, from Crystal Lake in Hancock County to the Mississippi River, through a narrow drainage basin having a maximum width of 40 miles and an average of 20 miles. The drainage basin above Iowa City is approximately 1,688.87 square miles.
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![[City of Iowa City]](iclogo5.gif)
![[faucet]](faucet4.gif)
