Fishhawk Lake
Gogebic County, Michigan77 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Mercury
- Limited data
Fishhawk Lake in Gogebic County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Surface area: 77.4 acres.
- Clarity
- 9.8 ft
- Area
- 77 acres
- Trend
- ↑ Improving
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Stays near Fishhawk Lake
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Watch Fishhawk Lake’s letter
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Why Fishhawk Lake has no grade
Fishhawk Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Fishhawk Lake is Not Rated — not an F. Its 9.8-foot median from 75 readings collected 2017–2022 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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.
Fishhawk Lake is a 77-acre lake in Gogebic County, Michigan. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-10. Grade methodology: LakeQuality methodology.
What Fishhawk Lake is good for
From access and monitoring records, not editorial picks.
- Clear water9.8 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Fishhawk Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Water quality measurements for Fishhawk Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9.8 ft. TSI 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 77 acres |
No bathymetric survey has been published for Fishhawk Lake, so its depth is not documented here.
Fishing Fishhawk Lake
Water Quality Trend: ↑ Improving
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.668 m/yr | 7 |
| Phosphorus | → Stable | -0.15 µg/L/yr | 8 |
EPA Impairment Status
Fishhawk Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040201020101-03 · Official waterbody report · Matched by proximity (1.76 km)
Graded lakes near Fishhawk Lake
Fishhawk Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Gogebic County
Frequently asked questions about Fishhawk Lake
Where is Fishhawk Lake?
- Fishhawk Lake is a lake in Gogebic 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 Fishhawk Lake?
- Fishhawk Lake in Gogebic County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Surface area: 77.4 acres.
Is Fishhawk Lake safe to swim in?
- The letter is not a swimming clearance. Fishhawk Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
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Where this data comes from
75 measurements from 1 monitoring station, 2017–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS75 samples · 2017–2022
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