Mallard Lake
Milwaukee County, Wisconsin16 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Mallard Lake. Here is what has been measured.
- 3 aquatic invasives
- 10 ft max depth
- Limited data
Mallard Lake in Milwaukee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 5 ft visibility. Maximum depth: 10 ft. Surface area: 16 acres.
Wisconsin DNR lists Panfish as present on Mallard Lake. DNR survey details →
Mallard Lake is a 16-acre lake in Milwaukee County, Wisconsin with a maximum depth of 10 feet. The lake supports 1 documented fish species including Panfish.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2024-09-26. 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 Mallard 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 Mallard Lake
These are the measurements Wisconsin DNR publishes for Mallard Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5 ft. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5ft | 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. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Mallard Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as present on Mallard Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mallard Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2024).
Fish Species (DNR-rated)
Lake Details
Max depth
10 ft
Surface area
16 acres
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Fish Species
Click a species to see every lake where it is documented.
Fishing Mallard Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Nearby Lakes in Milwaukee County
Frequently asked questions about Mallard Lake
Where is Mallard Lake?
- Mallard Lake 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 Mallard Lake?
- Mallard Lake in Milwaukee County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 5 ft visibility. Maximum depth: 10 ft. Surface area: 16 acres.
Is Mallard Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Mallard Lake?
- Mallard Lake has a maximum depth of 10 feet. The lake covers 16 acres.
What fish are in Mallard Lake?
- Fish species found in Mallard Lake include Panfish. Mallard Lake is located in Milwaukee County, Wisconsin.
What did the DNR fisheries survey find at Mallard Lake?
- Wisconsin DNR lists Panfish as present on Mallard Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mallard Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
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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
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
Fish and recreation data from Wisconsin DNR Lakes