A bill for an act relating to the treatment of private sewage disposal systems, including monitoring, maintenance, and reporting requirements, and including applicability provisions.

This bill requires owners of private sewage systems (for four or fewer dwelling units) to contract with certified technicians for ongoing monitoring and maintenance, with the contract required for the system's lifetime. It classifies systems into Class A (media-based filters like peat moss) and Class B (mechanical systems), mandating annual inspections for Class A systems and biannual inspections for Class B systems. All inspections and maintenance must be performed by certified technicians, with results reported to the system owner and county sanitarian, and aggregated into a public database by the state department. The bill also specifies site suitability requirements, preferring Class A systems where possible and restricting Class B systems from use in vacation properties or infrequently used facilities. These requirements apply to systems installed on or after July 1, 2026.