Skip to main content
LakeQuality
C

New Zoo Pond

Milwaukee County, WisconsinLimited DataMesotrophic

New Zoo Pond earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. New Zoo Pond ranks 6 of 14 in Milwaukee County — solidly in the upper half of the local distribution.

New Zoo Pond has no invasive species recorded in Wisconsin state databases as of 2026, though prevention practices still apply at all access points. The state fisheries records do not list documented species for New Zoo Pond, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-12. Grade methodology: LakeGrade methodology.

Watch New Zoo Pond water quality

Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Moderate clarity, visible to about 7.6 ft. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)7.6 ftC
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Improving

Based on 4 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+1.155 m/yr4
See year-by-year chart →

Location

Loading map…

County Ranking

Ranked #6 of 14 lakes in Milwaukee County

Nearby Lakes in Milwaukee County

State Parks Near New Zoo Pond

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Most recent sample: 2026-06-12

Monitoring stations: 1

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.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.