Dace Lake
Polk County, WisconsinLimited DataMesotrophic
Dace Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.
A TSI near 48 places Dace Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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. Dace Lake ranks 25 of 74 in Polk County — solidly in the upper half of the local distribution.
No invasive species are currently listed at Dace Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Dace Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. 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, Wisconsin DNR Surface Water, last sampled 2023-09-12. Grade methodology: LakeGrade methodology.
Watch Dace Lake water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
No clarity data. Phosphorus level: 21.3 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 21.3 µg/L | B |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.07 m/yr | 6 |
| Phosphorus | ↑ Improving | -2.8 µg/L/yr | 6 |
Location
County Ranking
Ranked #25 of 74 lakes in Polk County
Cleaner Lakes Within 30 Miles
Dace Lake holds Grade B. One nearby lake has a higher grade.
Nearby Lakes in Polk County
More Wisconsin Lake Rankings
State Parks Near Dace Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
EPA Impairment Status
Dace Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5R).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10005006 · Official waterbody report · Matched by proximity (1.58 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-12
Monitoring stations: 1
Where to stay near Dace Lake
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