Michigan: private well + septic

Michigan separates the required initial coliform result for a new or repaired well from MDHHS recurring and event-driven homeowner recommendations; the dedicated testing guide explains those paths.

EGLE describes professional inspection about every three years and pumping when needed, typically every three to five years, subject to local health department rules.

EGLE provides statewide laboratory, well, and maintenance guidance, while local health departments have primary regulatory authority over ordinary onsite septic systems.

Use the state well-record lookup for construction information and contact the local health department for onsite permits, inspections, and local code requirements.