Bruin Lake
Bruin Lake in Washtenaw County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Maximum depth: 48 ft. Surface area: 129.7 acres.
- Clarity
- 11.5 ft
- Max depth
- 48 ft
- Area
- 130 acres
- Public access
- Yes
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Why Bruin 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 Bruin 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, but not phosphorus and 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.
Bruin Lake is a 130-acre lake in Washtenaw County, Michigan with a maximum depth of 48 feet. The lake supports 1 documented fish species including Lake herring. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2016-09-11. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Bruin Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 11.5 ft. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Bruin Lake
Compare lakeside cabins, hotels, and vacation rentals near Bruin Lake in Washtenaw County, Michigan — 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 Bruin Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 48 ft |
| Surface Area | 130 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Bruin Lake
EPA Impairment Status
Bruin Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MI040900050306-09 · Official waterbody report
Graded lakes near Bruin Lake
Bruin Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Washtenaw County
Frequently asked questions about Bruin Lake
Where is Bruin Lake?
- Bruin Lake is a lake in Washtenaw County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Bruin Lake?
- Bruin Lake in Washtenaw County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11.5 ft visibility. Maximum depth: 48 ft. Surface area: 129.7 acres.
Is Bruin Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Bruin Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Bruin Lake?
- Bruin Lake has a maximum depth of 48 feet. The lake covers 129.7 acres.
What fish are in Bruin Lake?
- Fish species found in Bruin Lake include Lake herring. Bruin Lake is located in Washtenaw County, Michigan.
Are there boat ramps on Bruin Lake?
- Bruin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Public access is listed as yes.
Explore Bruin Lake across LakeQuality
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Where this data comes from
7 measurements from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS7 samples · 2016
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory