Hawthorne Hills Pond
Hawthorne Hills Pond in Ozaukee County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 57.6 µg/L. Surface area: 6 acres.
- Area
- 6 acres
- Trend
- ↑ Improving
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Why Hawthorne Hills Pond has no grade
We grade a lake only when the monitoring record supports a letter: 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 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 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. Grade methodology: LakeQuality methodology.
Watch Hawthorne Hills Pond water quality
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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 Pond
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus level: 57.6 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 57.6 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hawthorne Hills Pond
Compare lakeside cabins, hotels, and vacation rentals near Hawthorne Hills Pond in Ozaukee 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.
Top-rated places to stay near Hawthorne Hills Pond
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WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 6 acres |
No bathymetric survey has been published for Hawthorne Hills Pond, so its depth is not documented here.
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 Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -20.6 µg/L/yr | 3 |
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.
Graded lakes near Hawthorne Hills Pond
Hawthorne Hills Pond has no grade, but these lakes within a short drive do.
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. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Hawthorne Hills Pond?
- Hawthorne Hills Pond in Ozaukee County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 57.6 µg/L. Surface area: 6 acres.
Is Hawthorne Hills Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Hawthorne Hills 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
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)
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.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes