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LakeQuality

Corey Lake Southeastern Basin; Fabius Township vs Lake Templene

Water quality, depth, fish species, and recreation comparison.

Corey Lake Southeastern Basin; Fabius Township has a higher water quality grade (A, Excellent) than Lake Templene (D, Poor). Both are in St. Joseph County, Wisconsin.

Corey Lake Southeastern Basin; Fabius Township and Lake Templene are both in Michigan — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. Corey Lake Southeastern Basin; Fabius Township (A) is materially cleaner than Lake Templene (D). A gap that wide is unlikely to close in a single year of remediation work; it reflects multi-decade differences in the lakes themselves.

For a recreational visitor, the wider grade gap is decisive — Corey Lake Southeastern Basin; Fabius Township is the better water-quality choice. For a researcher, the gap is the interesting part: what is different about the two watersheds, and which of those differences is mutable?

Crystal clear, you can see 16 ft down.

D

Lake Templene

St. Joseph County, Wisconsin

Murky, only visible to about 6.5 ft.

Side-by-Side Metrics

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

Source: EPA National Aquatic Resource Surveys, 2026.

MetricCorey Lake Southeastern Basin; Fabius TownshipLake Templene
Overall GradeA (Excellent)D (Poor)
Water Clarity16 ft6.5 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area567 acres870 acres
Public AccessUnknownUnknown
Fish Species100
Trophic Stateoligotrophiceutrophic

Bold value = better for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better).

Verdict

Corey Lake Southeastern Basin; Fabius Township wins on overall water quality with a Grade A versus Lake Templene's Grade D. Water clarity: 16 ft vs 6.5 ft. For fishing diversity, Corey Lake Southeastern Basin; Fabius Township also leads with 10 species.