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LakeQuality
A

Lk Superior .09 Mi N of Poplar Creek Mouth Lake

Douglas County, WisconsinLimited DataMesotrophic

Lk Superior .09 Mi N of Poplar Creek Mouth Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Douglas County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Mesotrophic conditions dominate at Lk Superior .09 Mi N of Poplar Creek Mouth 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. Lk Superior .09 Mi N of Poplar Creek Mouth Lake ranks 12 of 40 in Douglas County — solidly in the upper half of the local distribution.

Lk Superior .09 Mi N of Poplar Creek Mouth Lake has no invasive species recorded in Wisconsin state databases as of 2022, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Lk Superior .09 Mi N of Poplar Creek Mouth Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-08-26. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

No clarity data. Phosphorus level: 16 µg/L. Trophic State Index: 44.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus16 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)44Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Declining

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-2.26 m/yr2
Phosphorus Declining+0.69 µg/L/yr5

Location

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County Ranking

Ranked #12 of 40 lakes in Douglas County

Nearby Lakes in Douglas County

State Parks Near Lk Superior .09 Mi N of Poplar Creek Mouth Lake

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2022-08-26

Monitoring stations: 1