Big Island Lake
Schoolcraft County, WisconsinLimited DataMesotrophic
Big Island Lake is a mesotrophic lake in Schoolcraft County, MI. Water quality is graded C based on 1 sampling years through 2023. The lake supports 5 documented fish species including Bluegill, Northern pike, and Pumpkinseed. Compared to the 4 other monitored lakes in Schoolcraft County, Big Island Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-09-13. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 9.2 ft. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.2 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Big Island Lake (14-day solunar calendar)
→ Is it safe to eat fish from Big Island Lake? (mercury & PFAS guide)
→ Big Island Lake fishing regulations (limits, seasons, special rules)
Location
County Ranking
Ranked #4 of 5 lakes in Schoolcraft County
Cleaner Lakes Within 30 Miles
Big Island Lake holds Grade C. 3 nearby lakes hold higher grades.
- BLegion LakeAlger County · 21.6 mi · Higher grade (C → B)
- BMiners LakeAlger County · 16.6 mi · Higher grade (C → B)
- BChapel LakeAlger County · 20.3 mi · Higher grade (C → B)
Nearby Lakes in Schoolcraft County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Cass County · Clarity: 7 ft
Leelanau County · Clarity: 9.5 ft
Iosco County · Clarity: 5.5 ft
Muskegon County · Clarity: 6.8 ft
Gladwin County · Clarity: 9 ft
Montmorency County · Clarity: 9 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: 2023-09-13
Monitoring stations: 1