Important Requirements if you are installing a septic system:

Local Wastewater Treatment System Application Process

Wastewater Search Information

Types of Wastewater Treatment Systems:

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.

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.

Wastewater (Septic) Treatment

Our goal at the Gallatin City-County Health Department is to protect human health and the environment through proper treatment and disposal practices in Gallatin County. The department achieves this through education, individual registration, inspections, and a system for reporting and resolving problems.

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