Is there lead in Decorah's tap water?
9.4PPBLead in Decorah Water Department's water at the latest test, from 2023 to 2025
Below 15, the level that requires action
Below 15, the level that requires action
5 public water companies list Decorah as a place they supply. The biggest is the Decorah Water Department, with about 7,615 people. The highest latest result among Decorah's water companies is 9.4 parts per billion, at the Decorah Water Department. None of the 5 with results was above 15 at its latest test. 3 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.