Hawthorne Hills South Pond
Hawthorne Hills South Pond in Dane County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 191 µg/L.
- Trend
- ↓ Declining
Next lake in Dane County
Why Hawthorne Hills South Pond has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Hawthorne Hills South Pond, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Hawthorne Hills South Pond is a lake in Dane County, Wisconsin. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2021-10-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Hawthorne Hills South Pond
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 191 µg/L. Trophic State Index: 80.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 191 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Hawthorne Hills South Pond
Compare lakeside cabins, hotels, and vacation rentals near Hawthorne Hills South Pond in Dane County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Fishing Hawthorne Hills South Pond
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +13.5 µg/L/yr | 2 |
Graded lakes near Hawthorne Hills South Pond
Hawthorne Hills South Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Dane County
Frequently asked questions about Hawthorne Hills South Pond
What is the water quality grade for Hawthorne Hills South Pond?
- Hawthorne Hills South Pond in Dane County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 191 µg/L.
Is Hawthorne Hills South Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Hawthorne Hills South Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
2 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX2 samples · 2021
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.