1. The department shall establish rules relating to permitting onsite wastewater treatment systems.
2. The department may prescribe by rule a process for obtaining variances for existing nonconforming or nonfunctional onsite wastewater treatment systems. The process shall consider the: a. Environmental impact; b. Impact to public health; c. Cost of compliance; and d. Least restrictive means. 3. Onsite wastewater sewage treatment system installation and inspections must comply with the rules adopted in accordance with this title.