The industries employed an estimated 1,758 people. All of the businesses in Allamakee County purchase their water from a PWS or obtain their water from a private supply not requiring a permit. There are three water use permits for industry in Allamakee County. One water use permit was issued for power production in Allamakee County. Mining Water Use Mining in Allamakee County consists of sand and gravel extraction.
Activity varies from year to year based upon construction needs.
Three 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 Allamakee 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 16.3 percent of wells tested for nitrates exceeded the recommended maximum. The test results are based on non-random samples.