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# 1

Iowa has the largest network of water-quality sensors in the U.S.

70+

Nitrate sensors deployed in the network, with results displayed on IWQIS

~25

Sensors measuring temperature, pH, SC, DO, and turbidity

Iowa Water-Quality Information System (IWQIS)

IWQIS allows users to access real-time water-quality data and information, such as nitrate, pH, and dissolved oxygen concentrations, discharge rates, and temperature.