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LakeQuality

St. Croix 1.5 Mi. Upstream of Point Douglas Dr Lake vs St. Croix 8 Mi. Upstream of Point Douglas Dr Lake

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

St. Croix 1.5 Mi. Upstream of Point Douglas Dr Lake and St. Croix 8 Mi. Upstream of Point Douglas Dr Lake both received the same overall water quality grade of C (Fair).

This comparison crosses state lines: St. Croix 1.5 Mi. Upstream of Point Douglas Dr Lake in Minnesota versus St. Croix 8 Mi. Upstream of Point Douglas Dr Lake in Wisconsin. The LakeGrade rubric is uniform across both, but the underlying monitoring programs differ in subtle ways worth noting. These two are within a letter of each other on the rubric — St. Croix 1.5 Mi. Upstream of Point Douglas Dr Lake (C) versus St. Croix 8 Mi. Upstream of Point Douglas Dr Lake (C). The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.

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.

Moderate clarity, visible to about 9.4 ft.

Moderate clarity, visible to about 8.9 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.

MetricSt. Croix 1.5 Mi. Upstream of Point Douglas Dr LakeSt. Croix 8 Mi. Upstream of Point Douglas Dr Lake
Overall GradeC (Fair)C (Fair)
Water Clarity9.4 ft8.9 ft
Phosphorus30 µg/L51 µg/L
Chlorophyll-a (Algae)No dataNo data
Maximum Depth78 ft60 ft
Surface Area8.4K acres7.7K acres
Public AccessNoUnknown
Fish Species10
Trophic Statemesotrophiceutrophic

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

Verdict

Both lakes earn the same Grade C. The tiebreakers come down to clarity (St. Croix 1.5 Mi. Upstream of Point Douglas Dr Lake: 9.4 ft, St. Croix 8 Mi. Upstream of Point Douglas Dr Lake: 8.9 ft) and what you want from the lake. St. Croix 1.5 Mi. Upstream of Point Douglas Dr Lake supports more documented fish species.