Ind. Code § 16-19-3-16

Sec. 16. The state department may conduct hearings, issue orders, and take action on behalf of the state for the enforcement of orders as necessary to regulate the use of existing or proposed sanitary systems that do not meet or would not meet health standards established by the state department under law or rule as means, by the use of the state department's police power, to abate or prevent the pollution of streams, rivers, lakes, and other bodies of water.