The industries employed an estimated 1,343 people. Most of the businesses in Winneshiek County purchase their water from a PWS or obtain their water from a private supply not requiring a permit. There are two water use permits for industry in Winneshiek County. There is no power production in Winneshiek County. Mining Water Use Mining in Winneshiek County consists of sand and gravel extraction.
Activity varies from year to year based upon construction needs.
Twelve 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 Winneshiek 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 16.8 percent of wells tested for nitrates exceeded the recommended maximum. These test results are based on non-random samples.