Our goal at the Lincoln County Health Department is to protect human health and the environment through proper treatment and disposal practices in Lincoln County. The department achieves this through education, individual registration, inspections, and a system for reporting and resolving problems.
- A local wastewater treatment system permit is ALWAYS required before a system (non-public or public) is installed.
Download Septic Permit Application
- Site evaluations must be performed by Lincoln County Sanitarians, Licensed Installers or a Professional Engineer registered in the state of Montana.
- A Lincoln County Licensed Installer or the Local Sanitarian must certify every system before the system is closed (Closure statement). Click here for a current list of Licncoln County Licensed Installers.
Types of Wastewater Treatment Systems
All of the types of wastewater treatment systems are subject to the current Lincoln County Wastewater Regulations which you download below. Download Wastewater Regulations
Non-public Wastewater Treatment Systems
Environmental Health Services is responsible for ensuring that non-public wastewater treatment systems (individual/shared, multi-user) are permitted and installed in accordance with state and local regulations. Proper placement, type, and sizing of systems are based on either a Certificate of Subdivision Approval (COSA) or a site evaluation which assesses the site to determine if suitable conditions exist for on-site wastewater treatment and dispersal.
Public Wastewater Treatment Systems
Montana Department of Environmental Quality (MDEQ) has primary responsibility for public wastewater treatment systems, which are defined as serving more than 24 persons for more than 60 days a year or having more than 14 connections.
Septic pumpers are required to obtain a license from MDEQ. Their equipment and disposal sites are regulated to ensure proper treatment of waste.