New Zoo Pond
New Zoo Pond in Milwaukee County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.6 ft visibility.
- Clarity
- 7.6 ft
- Trend
- ↑ Improving
Next lake in Milwaukee County
Swipe left or right on this bar to open the next or previous lake.
Why New Zoo 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 New Zoo Pond, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus 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.
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. Grade methodology: LakeQuality methodology.
Watch New Zoo Pond water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for New Zoo Pond
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 7.6 ft. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.6 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near New Zoo Pond
Compare lakeside cabins, hotels, and vacation rentals near New Zoo Pond in Milwaukee 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 New Zoo Pond
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Fishing New Zoo Pond
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.155 m/yr | 4 |
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.
Graded lakes near New Zoo Pond
New Zoo Pond has no grade, but these lakes within a short drive do.
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. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for New Zoo Pond?
- New Zoo Pond in Milwaukee County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.6 ft visibility.
Is New Zoo Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. New Zoo Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore New Zoo Pond across LakeQuality
Fish species and top-graded lakes across Wisconsin
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
State Parks Near New Zoo Pond
Other Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
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)
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)