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D

Emily Lake

Ramsey County, MinnesotaLimited DataEutrophic

Emily Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer.

At a TSI of 58, Emily Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 13 acres, Emily Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Emily Lake sits at rank 33 of 49 in Ramsey County, in the lower half of the local distribution.

Emily Lake has no invasive species recorded in Minnesota state databases as of 2024, though prevention practices still apply at all access points. The fishery is panfish-dominated — bluegill, crappie, and sunfish among the 3 species documented for the lake. No formal public access is documented at Emily Lake — most use is by shoreline residents and their guests. Ice-out has been recorded 5 times at Emily Lake, with a median around Apr 3. 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, Minnesota DNR LakeFinder, last sampled 2024-10-11. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 3.7 ft. Trophic State Index: 58.

MetricValueGrade
Water Clarity (Secchi Depth)3.7 ftD
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)58Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Surface Area12.99 acres
Shoreline Length0.9 mi
Public AccessNo

Fish Species

black bullhead,black crappie,bluegill

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

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

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

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

Water Quality Trend: Improving

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.035 m/yr5
Phosphorus Improving-0.75 µg/L/yr5
See year-by-year chart →

Ice Season

Historical ice data from Minnesota DNR (11 observations).

Typical Ice-Out
Apr 3
Typical Ice-In
Nov 25

Estimated open water season: 236 days

EarliestLatest
Ice-Out2025-03-24 (2025)2022-04-14 (2022)
Ice-In2018-11-13 (2018)2017-12-08 (2017)

Most recent ice-out: 2025-03-24

Location

Loading map…

County Ranking

Ranked #33 of 49 lakes in Ramsey County

Cleaner Lakes Within 30 Miles

Emily Lake holds Grade D. 4 nearby lakes hold higher grades.

Nearby Lakes in Ramsey County

DNR Fisheries Survey Summary

1 survey on file from MN DNR Fisheries. Most recent: 2006-07-05 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Black Bullhead105.900.08 lb
Black Crappie20.900.09 lb
Bluegill12.600.07 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

Length Distributions

Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.

Black Bullhead

724 fish · 411 in · 2006-07-05
48424204567891011

Black Crappie

141 fish · 412 in · 2006-07-05
115580trophy 10456789101112

Bluegill

122 fish · 37 in · 2006-07-05
6633034567

From the 2006-07-05 survey

There is no public access to Lake Emily. This assessment sampled three species (black bullhead, black crappie, and bluegill). Black bullhead and black crappie were abundant. Black bullhead lengths ranged from 4.5 to 11.5 inches, with most fish between 5 and 6 inches. The largest black crappie sampled was 12 inches,…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Emily Lake. 1 report on file.

EPA Impairment Status

Emily Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN62-0075-01 · Official waterbody report · Matched by proximity (1.45 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Ice data from Minnesota DNR Climate

Most recent sample: 2024-10-11

Monitoring stations: 1