New Zoo Pond
Milwaukee County, WisconsinView mapDirections
Wisconsin DNR publishes the water-quality measurements for New Zoo Pond. Here is what has been measured.
- Limited data
New Zoo Pond in Milwaukee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7.6 ft visibility.
New Zoo Pond is a lake in Milwaukee County, Wisconsin. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-12. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether New Zoo 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 New Zoo Pond
These are the measurements Wisconsin DNR publishes for New Zoo Pond, 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 7.6 ft. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading 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. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Answers come straight from the public measurements and survey records on this page.
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Fishing New Zoo Pond
Water Quality Trend: Improving
Based on 4 years of monitoring (2023–2026).
Water clarity
Improving4 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of New Zoo Pond under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Briggs Stratton Corp WauwatosaWauwatosa · 1.8 mi away · NPDES WI0026514Recent violation
- Wisconsin State Fair ParkWest Allis · 1.4 mi away · NPDES WIS049930
- Mayfair MallWauwatosa · 2.4 mi away · NPDES WI0062260
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 Milwaukee County
Frequently asked questions about New Zoo Pond
Where is New Zoo Pond?
- New Zoo Pond is a lake in Milwaukee County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of New Zoo Pond?
- New Zoo Pond in Milwaukee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7.6 ft visibility.
Is New Zoo 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
29 measurements from 1 monitoring station, 2023–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX29 samples · 2023–2026
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)