Buttermilk Slough
Washington County, Idaho53 acresView mapDirections
No nutrient or algae sampling on record from Idaho DEQ for this lake.
Buttermilk Slough in Washington County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 53 acres.
Buttermilk Slough is a 53-acre lake in Washington County, Idaho.
Source: EPA Water Quality Portal sampling records, IDEQ. 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 Buttermilk Slough is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Buttermilk Slough
These are the measurements Idaho DEQ publishes for Buttermilk 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 Buttermilk Slough
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
53 acres
Shoreline
7.5 mi
No bathymetric survey has been published for Buttermilk Slough, so its depth is not documented here.
Stays via Stay22
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Frequently asked questions about Buttermilk Slough
Where is Buttermilk Slough?
- Buttermilk Slough is a lake in Washington County, Idaho. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Buttermilk Slough?
- Buttermilk Slough in Washington County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Surface area: 53 acres.
Is Buttermilk 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 Buttermilk Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.