Quarry Lake
Brown County, WisconsinView mapDirections
Wisconsin DNR publishes the water-quality measurements for Quarry Lake. Here is what has been measured.
- Eutrophic
Quarry Lake in Brown County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 8 ft visibility. Phosphorus: 34 µg/L. Chlorophyll-a (algae): 9.6 µg/L.
Quarry Lake is a productive, nutrient-rich eutrophic lake in Brown County, Wisconsin. Overall water quality is improving over recent sampling years. Compared to the 1 other monitored lakes in Brown County, Quarry Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-16. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Quarry Lake 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 Quarry Lake
These are the measurements Wisconsin DNR publishes for Quarry Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 8 ft. Phosphorus 34 µg/L. Chlorophyll-a 9.6 µg/L. TSI 52.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 34µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 9.6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 52 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Quarry Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Quarry Lake typically sits around 68°F at the surface in September. Summer average is about 73°F. Usually warmest in Jul (about 76°F) and coldest in Apr (about 55°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (55°F) to its warmest (76°F).
Typical surface water temperature by month, from 48 field readings (2024–2025) via the EPA Water Quality Portal. See the full Quarry Lake water temperature breakdown →
Stays via Stay22
Stays near Quarry Lake
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Fishing Quarry Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving2 years
Phosphorus
Stable+0.26 µg/L/yr6 years
Chlorophyll-a
Improving-3.48 µg/L/yr6 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Quarry Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Oneida WwtfOneida · 1.7 mi away · NPDES WI0071323Recent violation
- Village Of Hobart Small MS4Hobart · 1.5 mi away · NPDES WI0073024
- Oneida Tribe Of IndiansOneida · 1.7 mi away · NPDES WI0073032
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 Brown County
Frequently asked questions about Quarry Lake
Where is Quarry Lake?
- Quarry Lake is a lake in Brown County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Quarry Lake?
- Quarry Lake in Brown County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 8 ft visibility. Phosphorus: 34 µg/L. Chlorophyll-a (algae): 9.6 µg/L.
Is Quarry Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Quarry Lake?
- Quarry Lake typically sits around 68°F at the surface in September, from 48 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
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Where this data comes from
65 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Oneida Nation
ONEIDA_WQX65 samples · 2020–2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P F ~ Phosphorus in Water by Colorimetry Automated Ascorbic Acid Method
- 4500 P E ~ Phosphorus by Ascorbic Acid
- UNKNOWN
- 10200 H ~ Chlorophyll a-b-c Determination
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)