Onsite wastewater · 50 states
Septic Rules by State
Whether you need a license to do septic work, how contractors get licensed, who issues permits, and what’s required when a home sells. Search a state, county, city or town.
Every state requires a permit to install, alter or repair a septic system. Local health departments can and often do set rules stricter than the state minimum. This is a reference guide, not legal advice: confirm current requirements with the permitting office before you rely on them. Last reviewed October 2026.
