How Millis’ new septic rules change inspections, installer requirements and certificates

Aug 17, 2026

The updated regulations add a formal certificate-of-occupancy review for septic-affecting work, require installer qualifications (including hoisting licenses for heavy-equipment operators), and update design/monitoring requirements for innovative nitrogen‑reducing systems.

The full story

The Millis Board of Health’s newly adopted regulations include several technical changes that will alter permitting and field practice for septic systems.

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