Brule Lake
Iron County, Michigan234 acresView mapDirections
Not enough samples to grade — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. No letter yet. Here is what we do have.
- 20 ft max depth
- Public access
- Limited data
Brule Lake in Iron County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5 ft visibility. Phosphorus: 22 µg/L. Maximum depth: 20 ft. Surface area: 233.5 acres.
- Clarity
- 5 ft
- Max depth
- 20 ft
- Area
- 234 acres
- Phosphorus
- 22 µg/L
- Public access
- Yes
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Watch Brule Lake’s letter
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Free interactive depth-contour map of Brule Lake, reaching a maximum surveyed depth of 20 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Brule 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 Brule Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity and phosphorus, but not algae (chlorophyll-a).
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 EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Brule Lake is a 234-acre lake in Iron County, Michigan with a maximum depth of 20 feet. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-11. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Brule Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5 ft. Phosphorus 22 µg/L. TSI 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | 22 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 20 ft |
| Surface Area | 234 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fishing Brule Lake
Graded lakes near Brule Lake
Brule Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Iron County
Frequently asked questions about Brule Lake
Where is Brule Lake?
- Brule Lake is a lake in Iron County, Michigan. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Brule Lake?
- Brule Lake in Iron County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5 ft visibility. Phosphorus: 22 µg/L. Maximum depth: 20 ft. Surface area: 233.5 acres.
Is Brule Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Brule Lake?
- Brule Lake has a maximum depth of 20 feet. The lake covers 233.5 acres.
Explore Brule Lake across LakeQuality
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Where this data comes from
8 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS8 samples · 2023
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)