Skip to main content
LakeQuality

St. Olaf Lake vs Watkins Lake

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

St. Olaf Lake has a higher water quality grade (D, Poor) than Watkins Lake (F, Very Poor). Both are in Waseca County, Minnesota.

Both St. Olaf Lake and Watkins Lake sit in Minnesota. A same-state comparison strips out the state-level water-quality regime as a variable: any grade differences here are about the lakes themselves, not the agencies grading them. The grades are close: St. Olaf Lake (D) and Watkins Lake (F) are within one letter of each other on the LakeGrade rubric. The per-parameter sub-grades below will show where the small differences actually live.

With grades this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.

D

St. Olaf Lake

Waseca County, Minnesota

Murky, only visible to about 5 ft.

F

Watkins Lake

Waseca County, Minnesota

Very murky, less than 3.2 ft of visibility.

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.

MetricSt. Olaf LakeWatkins Lake
Overall GradeD (Poor)F (Very Poor)
Water Clarity5 ft3.2 ft
PhosphorusNo dataNo data
Chlorophyll-a (Algae)No dataNo data
Maximum Depth--
Surface Area90 acres134 acres
Public AccessUnknownUnknown
Fish Species10
Trophic Stateeutrophiceutrophic

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

Verdict

St. Olaf Lake wins on overall water quality with a Grade D versus Watkins Lake's Grade F. Water clarity: 5 ft vs 3.2 ft. For fishing diversity, St. Olaf Lake also leads with 1 species.