Big Maggie Lake; Mastodon Township
Iron County, WisconsinMesotrophic
Big Maggie Lake; Mastodon Township is a mesotrophic lake in Iron County, MI. Water quality is graded A based on 2 sampling years through 2023. Compared to the 38 other monitored lakes in Iron County, Big Maggie Lake; Mastodon Township ranks #22 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-08-27. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Good clarity, visible to about 11 ft. Chlorophyll-a: 3.1 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 3.1 µg/L | A |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Location
County Ranking
Ranked #22 of 39 lakes in Iron County
Nearby Lakes in Iron County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mecosta County · Clarity: 12.8 ft
Benzie County · Clarity: 13.5 ft
Clare County · Clarity: 15 ft
Kalkaska County · Clarity: 16 ft
Gogebic County · Clarity: 18 ft
Leelanau County · Clarity: 15.5 ft
Mesotrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-08-27
Monitoring stations: 1