Cisco Lake
Gogebic County, Michigan723 acresView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- Impaired · Mercury
- #14 of 21 in the county
- 20 ft max depth
- Public access
- Limited data
Cisco Lake in Gogebic County, Michigan has a water quality grade of C (Fair). Water clarity: 7 ft visibility. Phosphorus: 33 µg/L. Maximum depth: 20 ft. Surface area: 723 acres.
- Clarity
- 7 ft
- Max depth
- 20 ft
- Area
- 723 acres
- Type
- Eutrophic
- Phosphorus
- 33 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Cisco Lake is a 723-acre productive, nutrient-rich eutrophic lake in Gogebic County, Michigan with a maximum depth of 20 feet. Water quality is graded C based on 1 sampling years through 2023. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 20 other monitored lakes in Gogebic County, Cisco Lake ranks #14 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-13. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Cisco Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Moderate clarity, visible to about 7 ft. Phosphorus 33 µg/L. TSI 52. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Not graded |
| Phosphorus | 33 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 20 ft |
| Surface Area | 723 acres |
| Public Access | Yes |
Fishing Cisco Lake
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.531 m/yr | 6 |
| Phosphorus | → Stable | +0.5 µg/L/yr | 7 |
EPA Impairment Status
Cisco 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 MI040201020101-02 · Official waterbody report · Matched by proximity (0.11 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Cisco Lake under Clean Water Act (NPDES) discharge permits.
- Cisco Lake ResortWatersmeet · 0.4 mi away · NPDES MIG080929
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
County Ranking
Ranked #14 of 21 lakes in Gogebic County
Nearby Lakes in Gogebic County
Frequently asked questions about Cisco Lake
Where is Cisco Lake?
- Cisco Lake is a lake in Gogebic County, Michigan. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Cisco Lake?
- Cisco Lake in Gogebic County, Michigan has a water quality grade of C (Fair). Water clarity: 7 ft visibility. Phosphorus: 33 µg/L. Maximum depth: 20 ft. Surface area: 723 acres.
Is Cisco Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Cisco Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
How deep is Cisco Lake?
- Cisco Lake has a maximum depth of 20 feet. The lake covers 723 acres.
Explore Cisco Lake across LakeQuality
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Where this data comes from
108 measurements from 1 monitoring station, 2016–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS108 samples · 2016–2023
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)