Moon Lake
Gogebic County, Michigan95 acresView mapDirections
EGLE publishes the water-quality measurements for Moon Lake. Here is what has been measured.
- Oligotrophic
Moon Lake in Gogebic County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 18 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2 µg/L. Surface area: 94.6 acres.
Moon Lake is a 95-acre cold, clear oligotrophic lake in Gogebic County, Michigan. Overall water quality is improving over recent sampling years. Compared to the 20 other monitored lakes in Gogebic County, Moon Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-16. Methodology: how these readings are compared.
What Moon Lake is good for
From access and monitoring records, not editorial picks.
- Clear water18 ft of visibility
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Moon Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Moon Lake
These are the measurements EGLE publishes for Moon Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 18 ft down. Phosphorus 10 µg/L. Chlorophyll-a 2 µg/L. TSI 37.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 18ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 2µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 37 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Moon Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
95 acres
No bathymetric survey has been published for Moon Lake, so its depth is not documented here.
Stays via Stay22
Stays near Moon Lake
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Fishing Moon Lake
Water Quality Trend: Improving
Based on 8 years of monitoring (2016–2023).
Water clarity
Improving8 years
Phosphorus
Improving-0.64 µg/L/yr7 years
Chlorophyll-a
Worsening+0.21 µg/L/yr7 years
Nearby Lakes in Gogebic County
Frequently asked questions about Moon Lake
Where is Moon Lake?
- Moon Lake is a lake in Gogebic County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Moon Lake?
- Moon Lake in Gogebic County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 18 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2 µg/L. Surface area: 94.6 acres.
Is Moon Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Moon Lake across LakeQuality
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Where this data comes from
170 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_MICORPS170 samples · 2016–2023
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.