This bill establishes new regulations for the treatment of private sewage disposal systems in Iowa, focusing on monitoring, maintenance, and reporting requirements. It introduces definitions for key terms such as "aerobic treatment unit," "private sewage disposal system," and "proprietary treatment system," which is categorized into Class A and Class B systems based on their treatment methods. The bill mandates that owners of private sewage disposal systems must enter into a monitoring and maintenance contract with a certified technician prior to installation, with the contract required for the system's lifespan and a copy submitted to the county sanitarian. It also sets specific inspection frequencies for Class A and Class B systems and requires that all maintenance and monitoring be conducted by certified technicians.

Additionally, the bill outlines the responsibilities of county sanitarians in inspecting these systems and mandates the recording of specific information during inspections, such as the system's functionality and reasons for any deficiencies. The county sanitarian must report this information to the Department of Natural Resources, which will maintain a publicly accessible database of inspection outcomes, excluding personally identifiable information. The bill also grants the department rulemaking authority to implement these provisions and specifies that these regulations will apply to systems installed on or after July 1, 2026.