The industries employed an estimated 5,932 people. Most of the businesses in Clinton County purchase their water from a PWS or obtain their water from a private supply not requiring a permit. There are ten water use permits for industry in Clinton County. Currently there is one water use permit issued for power production in the county, which utilizes about 58 billion gallons per year. Mining Water Use Mining in Clinton County consists of sand and gravel extraction.
Activity varies from year to year based upon construction needs.
Two water permits were issued for mining in the county. The State-Wide Rural Well Water Survey completed in 1989 indicates the following quality results for private well water, shown in Table 3, for the northeast hydrogeologic region in which Clinton County is located. The Iowa State-Wide Rural Well Water Survey, 1990. The UHL's test results for the county also show that in an average year 22.4 percent of wells tested for nitrates exceeded the recommended maximum. These test results are based on non-random samples.