Big Slough
Big Slough in Murray County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 344 acres.
- Area
- 344 acres
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Why Big Slough has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Big Slough, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Big Slough is a 344-acre lake in Murray County, Minnesota.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Big Slough water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Big Slough
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Big Slough
Compare lakeside cabins, hotels, and vacation rentals near Big Slough in Murray County, Minnesota — 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 Big Slough
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 344 acres |
No bathymetric survey has been published for Big Slough, so its depth is not documented here.
Recreation & Access
- Big Slough LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Big Slough
Nearby Lakes in Murray County
Frequently asked questions about Big Slough
Where is Big Slough?
- Big Slough is a lake in Murray County, Minnesota. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Big Slough?
- Big Slough in Murray County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 344 acres.
Is Big Slough safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Big Slough is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Big Slough?
- Big Slough has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Big Slough Lake.
Explore Big Slough across LakeQuality
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Where this data comes from
Measurements for Big Slough come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory