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F

Cathedral Point Pond

Dane County, WisconsinLimited DataHypereutrophic

Cathedral Point Pond earns an F: 248 µg/L of phosphorus and clarity readings still being added signal heavy nutrient loading from the surrounding watershed.

A TSI above 70 puts Cathedral Point Pond in hypereutrophic territory: visible blooms are common, and clarity rarely climbs even in early summer. 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. Cathedral Point Pond ranks 19 of 21 in Dane County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Cathedral Point Pond — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Cathedral Point Pond, 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 2021-10-05. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

No clarity data. Phosphorus level: 248 µg/L. Trophic State Index: 84.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus248 µg/LF
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)84Hypereutrophic

Very high nutrients, dense algae, poor clarity

Water Quality Trend: Declining

Based on 2 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Phosphorus Declining+13.5 µg/L/yr2

Location

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County Ranking

Ranked #19 of 21 lakes in Dane County

Nearby Lakes in Dane County

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