How's my lake? Minnesota
12 lakes, measured from space every open-water season (May 15 to Oct 15) from 2024 to 2026. Ranked by how green the water was in 2026, greenest first.
| Lake | Greenness 2026 NDCI, season mean | Every month, 2024 to 2026 | Latest chlorophyll-a µg/L estimate | |
|---|---|---|---|---|
| Albert Lea Lake Freeborn County · 10.1 km² | 0.33 | 12.7 Oct 6, 2026 | ||
| Lake Shetek Murray County · 14.11 km² | 0.11 | 8.3 Oct 13, 2026 | ||
| Big Stone Lake Big Stone County · 48.17 km² | 0.08 | 7.7 Oct 4, 2026 | ||
| Lake Pepin Goodhue and Wabasha County · 104.41 km² | 0.08 | 9.2 Oct 7, 2026 | ||
| Lake Bemidji Beltrami County · 26.6 km² | 0.02 | 9.5 Oct 4, 2026 | ||
| White Bear Lake Ramsey and Washington County · 9.83 km² | 0.01 | 8.3 Oct 7, 2026 | ||
| Gull Lake Cass and Crow Wing County · 40.13 km² | 0.00 | 12.7 Aug 2, 2026 | ||
| Lake Vermilion St. Louis County · 157.37 km² | 0.00 | 9.8 Oct 6, 2026 | ||
| Lake Winnibigoshish Itasca and Cass County · 225.55 km² | 0.00 | 9.1 Oct 5, 2026 | ||
| Lake Minnetonka Hennepin County · 54.64 km² | 0.00 | 11.8 Aug 3, 2026 | ||
| Lake Harriet Hennepin County · 1.39 km² | -0.05 | 9.7 Oct 6, 2026 | ||
| Burntside Lake St. Louis County · 29.13 km² | -0.07 | 10.2 Oct 6, 2026 |
Bars and lines share one scale, -0.40 to 0.60; the hairline is zero, where water turns from clear to green. The chlorophyll column comes from a placeholder model (test R² 0.10, trained on estuary water), so compare lakes by greenness for now.How it works · Download the table (JSON)