Hawthorne Hills Pond
Ozaukee County, Wisconsin6 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Hawthorne Hills Pond. Here is what has been measured.
- Curly-Leaf Pondweed
- Limited data
Hawthorne Hills Pond in Ozaukee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 57.6 µg/L. Surface area: 6 acres.
Hawthorne Hills Pond is a 6-acre lake in Ozaukee County, Wisconsin. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-08-13. Methodology: how these readings are compared.
Hawthorne Hills Pond covers about 6 acres in Ozaukee County. If you are planning to stay, you can search lake houses and cabins around Hawthorne Hills Pond on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Hawthorne Hills Pond is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Hawthorne Hills Pond
These are the measurements Wisconsin DNR publishes for Hawthorne Hills Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 57.6 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 57.6µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Hawthorne Hills Pond
Answers come straight from the public measurements and survey records on this page.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).
Lake Details
Surface area
6 acres
No bathymetric survey has been published for Hawthorne Hills Pond, so its depth is not documented here.
Stays via Stay22
Stays near Hawthorne Hills Pond
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Fishing Hawthorne Hills Pond
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water quality readings over time
3 seasons of samples on record (2024–2026). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-20.6 µg/L/yr3 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Hawthorne Hills Pond under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Fredonia Municipal Sewer And Water UtilityFredonia · 1.8 mi away · NPDES WI0020800Recent violation
- Paulus DairyFredonia, Town Of · 2.6 mi away · NPDES WI0065927
- Melichar Broad AcresPort Washington, Town Of · 4.1 mi away · NPDES WI0064866
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Ozaukee County
Frequently asked questions about Hawthorne Hills Pond
Where is Hawthorne Hills Pond?
- Hawthorne Hills Pond is a lake in Ozaukee County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Hawthorne Hills Pond?
- Hawthorne Hills Pond in Ozaukee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 57.6 µg/L. Surface area: 6 acres.
Is Hawthorne Hills Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
1 measurement from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX1 sample · 2024
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes