Fennon Slough
Flathead County, Montana209 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Fennon Slough in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 209 acres.
Fennon Slough is a 209-acre lake in Flathead County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Fennon Slough is safe to swim in today is a call for the Montana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Fennon Slough
These are the measurements Montana DEQ publishes for Fennon Slough, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Fennon Slough
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
209 acres
Shoreline
7.1 mi
No bathymetric survey has been published for Fennon Slough, so its depth is not documented here.
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Frequently asked questions about Fennon Slough
Where is Fennon Slough?
- Fennon Slough is a lake in Flathead County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Fennon Slough?
- Fennon Slough in Flathead County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 209 acres.
Is Fennon Slough safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
Measurements for Fennon Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.