The U.S. Environmental Protection Agency is considering whether to approve changes Indiana plans to make to its drinking-water regulations. Some of the changes are required under amendments to the federal Safe Drinking Water Act. States such as Indiana that administer their own programs must adopt rules at least as stringent as EPA regulations.
Indiana's changes include reducing exposure to arsenic and radionuclides to potentially reduce the risk of cancer, and controlling microbial contaminants, particularly cryptosporidium, a diarrheal disease caused by microscopic parasites
The EPA may decide to hold a public hearing on the proposed changes if there is enough public interest.