Iron Lake
Iron County, Michigan390 acresView mapDirections
EGLE publishes the water-quality measurements for Iron Lake. Here is what has been measured.
- Mesotrophic
- 45 ft max depth
- Limited data
Iron Lake in Iron County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 9 ft visibility. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 2.6 µg/L. Maximum depth: 45 ft. Surface area: 389.9 acres.
Iron Lake is a 390-acre mesotrophic lake in Iron County, Michigan with a maximum depth of 45 feet. Compared to the 20 other monitored lakes in Iron County, Iron Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2016-09-08. Methodology: how these readings are compared.
What Iron Lake is good for
From access and monitoring records, not editorial picks.
- Deep water45 ft surveyed max depth
Swimming conditions
Readings onlyLimited data
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 Iron 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 Iron Lake
These are the measurements EGLE publishes for Iron Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9 ft. Phosphorus 9 µg/L. Chlorophyll-a 2.6 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 9µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.6µg/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. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Iron Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
45 ft
Surface area
390 acres
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Fishing Iron Lake
Nearby Lakes in Iron County
Frequently asked questions about Iron Lake
Where is Iron Lake?
- Iron Lake is a lake in Iron County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Iron Lake?
- Iron Lake in Iron County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 9 ft visibility. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 2.6 µg/L. Maximum depth: 45 ft. Surface area: 389.9 acres.
Is Iron Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Iron Lake?
- Iron Lake has a maximum depth of 45 feet. The lake covers 389.9 acres.
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Where this data comes from
18 measurements from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS18 samples · 2016
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.