Silent Street Pond
Dane County, WisconsinLimited DataHypereutrophic
On the LakeGrade rubric Silent Street Pond fails the cutoffs — a TSI of 94 and persistent algal pressure put it in the bottom tier. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.
Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. 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. Within the 23 graded lakes of Dane County, Silent Street Pond sits at rank 18, near the bottom of the county list.
No invasive species are currently listed at Silent Street Pond — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Silent Street Pond, 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 2021-10-05. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
No clarity data. Phosphorus level: 508 µg/L. Trophic State Index: 94.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 508 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 94 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -132 µg/L/yr | 2 |
Location
County Ranking
Ranked #18 of 23 lakes in Dane County
Nearby Lakes in Dane County
More Wisconsin Lake Rankings
State Parks Near Silent Street Pond
Other Grade F Lakes in Wisconsin
Hypereutrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-10-05
Monitoring stations: 1