How a Septic System Works
Protecting Montana lakes, one system at a time. Tap the diagram to enlarge for reading.
Education Library
Learn about septic health, water quality, and how to protect Little Bitterroot Lake. Browse articles, guides, and resources below.
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Hot Spot Map for Little Bitterroot Lake
Map of Little Bitterroot Lake that shows areas of septic leachate concern. Red is older septic systems at risk of leachate.
View resourceSeptic Education & Maintenance Program Toolkit
Interactive toolkit from the Montana DNRC. Septic system maintenance and education are key tools in protecting local water quality. This toolkit helps communities understand and maintain their septic
Open siteEPA Septic Maintenance Reimbursement Application 2026
Online application form for the 2026 septic system maintenance reimbursement program. Opens in a new tab to complete and submit your application.
Open siteHomeowner Septic Guide EPA
Information on what can make a septic fail
View resourceHandout to Older Septic Systems
Information on how to maintain older septic systems.
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