Septic Info Map

Launch the official Flathead County Interactive Mapping Application, pre-zoomed to Little Bitterroot Lake. Use it to look up parcels, septic zones, environmental health complaints, water/sewer districts, and more.

Flathead County Interactive Mapping Application

The county's official map. Search by parcel, owner, or address; view septic zones, environmental health complaints, water/sewer districts, zoning, fire districts, and more.

Before you launch — quick 3-step guide

When the county map opens, here’s how to find your septic info:

  1. Dismiss the “Domain Change” splash by clicking OK.
  2. Click on your property on the map (zoom in if needed).
  3. Review the popup for your parcel and septic information.

Click “Launch Map” below

Little Bitterroot Lake area — Flathead County hydrology preview

Open Flathead County Map

Opens in a popup window, pre-zoomed to Little Bitterroot Lake.

Launch Map

Preview image © Flathead County GIS Hydrology service. The county's main map cannot be embedded directly — their server explicitly blocks it.