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LakeQuality
B

Lake Emily

Dodge County, WisconsinMesotrophic

Lake Emily carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. 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.

Mesotrophic conditions dominate at Lake Emily: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. A maximum depth of just 10 ft means sediment-bound phosphorus releases back into the water column whenever wind stirs the bottom — a classic shallow-lake dynamic. Lake Emily covers 268 acres alongside partial shoreline records — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Among the 3 graded lakes in Dodge County, Lake Emily sits at rank 1, above the county median.

Zebra mussels have been documented at Lake Emily, which alters the filter-feeding balance and can paradoxically increase water clarity while disrupting the food web. The fishery includes walleye alongside the lake's other 4 documented species — a notable draw for Wisconsin anglers. Public access is available — the lake is on the Wisconsin DNR public-access list. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-08-31. Grade methodology: LakeGrade methodology.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 11.5 ft. Phosphorus level: 39.5 µg/L. Trophic State Index: 50.

MetricValueGrade
Water Clarity (Secchi Depth)11.5 ftB
Phosphorus39.5 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)50Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth10 ft
Surface Area268 acres
Public AccessYes

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ Best fishing times for Lake Emily (14-day solunar calendar)

→ Is it safe to eat fish from Lake Emily? (mercury & PFAS guide)

Lake Emily fishing regulations (limits, seasons, special rules)

Invasive Species

Curly-Leaf PondweedEurasian Water-MilfoilZebra Mussel

Water Quality Trend: Declining

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.13 m/yr7
Phosphorus Stable-0.04 µg/L/yr6

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #1 of 3 lakes in Dodge County

Nearby Lakes in Dodge County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1994. 1 station on file (most recent sample 2025).

DNR Assessment
Good · Shallow Headwater lake
Trophic State Index 58 (eutrophic) · 5-year average

Fish Species (DNR-rated)

Largemouth Bass(Abundant)Panfish(Common)Northern Pike(Common)Walleye(Present)

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Lake Emily covering fish populations, stocking, water quality, and management. 1 report on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2025-08-31

Monitoring stations: 1