What is a Watershed?
A ‘watershed,’ or ‘basin,’ is the area of land that drains to a common water body.
The Iowa River watershed spans just over 3 million acres (4,817 square miles) in eastern Iowa. The watershed originates in northern Hancock County, and empties into the Mississippi River in Louisa County.
This page provides links to a variety of reports and data available about the Iowa River watershed. If you are aware of an additional data source or report that you would like to see added to this page, please contact firstname.lastname@example.org.
IOWATER – Water Quality Monitoring Data
Iowa Flood Center – Stream Stage Sensors
National Weather Service – Advanced Hydrologic Prediction Service for the Iowa River
The goal of a TMDL, or Total Maximum Daily Load, is to determine the amount of pollutant reduction necessary in order to restore water quality in an impaired waterbody. The TMDL reports that have been developed for impaired waterways in the Iowa River watershed are provided below.
Iowa River – pathogens
Lower Pine Lake – organic enrichment
Lake Macbride – nutrients and siltation
Upper Pine Lake – siltation
Walnut Creek – Stressor Identification
Union Grove Lake – algae, pH, and turbidity