Skip to main content
LakeQuality
A

Low: Mpca Co-Located Site Big Traverse Bay Lake

Lake of the Woods County, MinnesotaMesotrophic

On the LakeGrade rubric, Low: Mpca Co-Located Site Big Traverse Bay Lake pulls an A: clarity at 16.4 ft and 23 µg/L of phosphorus put it in the top bracket for Minnesota. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

Mesotrophic conditions dominate at Low: Mpca Co-Located Site Big Traverse Bay Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Low: Mpca Co-Located Site Big Traverse Bay Lake ranks 3 of 11 in Lake of the Woods County — solidly in the upper half of the local distribution.

Zebra mussel presence at Low: Mpca Co-Located Site Big Traverse Bay Lake means the lake's clarity numbers carry an asterisk — filtered water is not the same as nutrient-poor water. The state fisheries records do not list documented species for Low: Mpca Co-Located Site Big Traverse Bay Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Low: Mpca Co-Located Site Big Traverse Bay Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-24. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 16.4 ft down. Phosphorus level: 23 µg/L. Trophic State Index: 43.

MetricValueGrade
Water Clarity (Secchi Depth)16.4 ftA
Phosphorus23 µg/LB
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)43Mesotrophic

Moderate nutrients, good water quality

Invasive Species

spiny waterfleazebra mussel

Water Quality Trend: Stable

Based on 3 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.246 m/yr3
Phosphorus Improving-0.75 µg/L/yr3
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (6 observations).

Typical Ice-Out
May 5
EarliestLatest
Ice-Out1976-04-26 (1976)1996-05-19 (1996)
Ice-In1986-11-11 (1986)1988-11-17 (1988)

Most recent ice-out: 1997-05-06

Location

Loading map…

County Ranking

Ranked #3 of 11 lakes in Lake of the Woods County

Nearby Lakes in Lake of the Woods County

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Low: Mpca Co-Located Site Big Traverse Bay Lake. 1 report on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Ice data from Minnesota DNR Climate

Most recent sample: 2024-10-24

Monitoring stations: 1