Si Merrell Slough
Daniels County, Montana142 acresView mapDirections
No nutrient or algae sampling on record from Montana DEQ for this lake.
Si Merrell Slough in Daniels County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 142 acres.
Si Merrell Slough is a 142-acre lake in Daniels 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 Si Merrell 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 Si Merrell Slough
These are the measurements Montana DEQ publishes for Si Merrell 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 Si Merrell Slough
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
142 acres
Shoreline
4.7 mi
No bathymetric survey has been published for Si Merrell Slough, so its depth is not documented here.
Stays via Stay22
Stays near Si Merrell Slough
Compare lakeside cabins, hotels, and vacation rentals near Si Merrell Slough in Daniels County, Montana — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Si Merrell Slough
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Montana’s top lakes →
Follow Si Merrell Slough’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Si Merrell Slough
Nearby Lakes in Daniels County
Frequently asked questions about Si Merrell Slough
Where is Si Merrell Slough?
- Si Merrell Slough is a lake in Daniels County, Montana. Its water-quality measurements are published by Montana DEQ and shown on this page as reported.
What is the water quality of Si Merrell Slough?
- Si Merrell Slough in Daniels County, Montana has water-quality measurements published by Montana DEQ, shown here as reported. Surface area: 142 acres.
Is Si Merrell Slough safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Si Merrell Slough across LakeQuality
More lakes in Montana
Other Lakes in Montana
Where this data comes from
Measurements for Si Merrell Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.