Little Maggie Lake
Iron County, MichiganView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Mesotrophic
- #7 of 21 in the county
- Limited data
Little Maggie Lake in Iron County, Michigan has a water quality grade of A (Excellent). Water clarity: 12.3 ft visibility. Phosphorus: 16 µg/L. Chlorophyll-a (algae): 3.6 µg/L.
- Clarity
- 12.3 ft
- Type
- Mesotrophic
- Trend
- ↑ Improving
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Watch Little Maggie Lake’s letter
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Free interactive depth-contour map of Little Maggie Lake, reaching a maximum surveyed depth of 30 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Little Maggie Lake is a mesotrophic lake in Iron County, Michigan. Water quality is graded A based on 1 sampling years through 2023. Overall water quality is improving over recent sampling years. Compared to the 20 other monitored lakes in Iron County, Little Maggie Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-05. Grade methodology: LakeQuality methodology.
What Little Maggie Lake is good for
From access and monitoring records, not editorial picks.
- Clear water12.3 ft of visibility
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 A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Good clarity, visible to about 12.3 ft. Phosphorus 16 µg/L. Chlorophyll-a 3.6 µg/L. TSI 43. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12.3 ft | Not graded |
| Phosphorus | 16 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3.6 µg/L | Good |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Little Maggie Lake
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.983 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.96 µg/L/yr | 7 |
| Chlorophyll-a | → Stable | -0.09 µg/L/yr | 7 |
County Ranking
Ranked #7 of 21 lakes in Iron County
Nearby Lakes in Iron County
Frequently asked questions about Little Maggie Lake
Where is Little Maggie Lake?
- Little Maggie Lake is a lake in Iron County, Michigan. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Little Maggie Lake?
- Little Maggie Lake in Iron County, Michigan has a water quality grade of A (Excellent). Water clarity: 12.3 ft visibility. Phosphorus: 16 µg/L. Chlorophyll-a (algae): 3.6 µg/L.
Is Little Maggie Lake safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Little Maggie Lake across LakeQuality
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Moderate nutrients, good water quality
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Where this data comes from
24 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_MICORPS24 samples · 2016–2023
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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.