Chief Lake
Chief Lake in Mahnomen County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 121 acres.
- Area
- 121 acres
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Why Chief Lake 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 Chief Lake, 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.
Chief Lake is a 121-acre lake in Mahnomen County, Minnesota.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Chief Lake 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 Chief Lake
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 Chief Lake
Compare lakeside cabins, hotels, and vacation rentals near Chief Lake in Mahnomen 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 Chief Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 121 acres |
No bathymetric survey has been published for Chief Lake, so its depth is not documented here.
Fishing Chief Lake
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Frequently asked questions about Chief Lake
Where is Chief Lake?
- Chief Lake is a lake in Mahnomen 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 Chief Lake?
- Chief Lake in Mahnomen County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 121 acres.
Is Chief Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Chief Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Chief Lake 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