Welcome to the Iowa Water Quality Information System.
The IWQIS allows access to real-time water-quality data and information such as nitrate, pH, and dissolved oxygen concentrations, discharge rates, and temperature.

Iowa WQIS integrates data gathered by IIHR—Hydroscience & Engineering (IIHR) and United States Geological Survey (USGS) and offers access to real time nutrient data with a range of water-related information such as precipitation, stream flow, and soil moisture. Our goal is to help researchers, agencies, and land-owners directly monitor the impact of land-use strategies/changes on downstream water-quality, enable watershed stakeholders to understand the fate and transport of nutrients in Iowa’s waterways; and help the state monitor the success of its Iowa Nutrient Reduction Strategy.

Additional information are available in the annual reports:

For additional information: