Chelsea Slough
Roosevelt County, Montana373 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Chelsea Slough in Roosevelt County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 373 acres.
Chelsea Slough is a 373-acre lake in Roosevelt 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 Chelsea 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 Chelsea Slough
These are the measurements Montana DEQ publishes for Chelsea 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 Chelsea Slough
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
373 acres
Shoreline
10.5 mi
No bathymetric survey has been published for Chelsea Slough, so its depth is not documented here.
Stays via Stay22
Stays near Chelsea Slough
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Fishing Chelsea Slough
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Frequently asked questions about Chelsea Slough
Where is Chelsea Slough?
- Chelsea Slough is a lake in Roosevelt County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Chelsea Slough?
- Chelsea Slough in Roosevelt County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 373 acres.
Is Chelsea 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 Chelsea Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.