An Act relative to on-site sewage disposal systems

This bill modifies Massachusetts law to require local boards of health to obtain prior approval from the Department of Environmental Protection (DEP) before adopting stricter on-site sewage disposal regulations than state standards. The DEP must approve such local rules only if they have a scientific basis, represent best practices, protect unique local resources, and don't conflict with existing state rules (Title 5 of the State Environmental Code). It directly affects local boards of health and property owners installing or maintaining septic systems, ensuring local rules align with state requirements. The bill does not change the baseline state standards but adds a review process for any stricter local regulations.