Mueller Lake
Lake County, Minnesota24 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Mueller Lake. Here is what has been measured.
- 36 ft max depth
- Limited data
Mueller Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 9 ft visibility. Maximum depth: 36 ft. Surface area: 23.6 acres.
Minnesota DNR's Standard Survey on September 11, 2001 caught 1.50 northern pike per gill net at Mueller Lake. Length samples in the latest survey that recorded them ran 23–23 inches. DNR survey details →
Mueller Lake is a 24-acre lake in Lake County, Minnesota with a maximum depth of 36 feet. Overall water quality is declining over recent sampling years. The lake supports 3 documented fish species including northern pike, white sucker, and yellow perch. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-06-17. Methodology: how these readings are compared.
What Mueller Lake is good for
From access and monitoring records, not editorial picks.
- Fishing3 species recorded
- Deep water36 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Mueller Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mueller Lake
These are the measurements Minnesota PCA publishes for Mueller Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9 ft. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9ft | 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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Mueller Lake
Answers come straight from the public measurements and survey records on this page.
Minnesota DNR's Standard Survey on September 11, 2001 caught 1.50 northern pike per gill net at Mueller Lake. Length samples in the latest survey that recorded them ran 23–23 inches.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mueller Lake’s water-quality measurements separately, and the water-quality trend over 4 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 2001-09-11 (Standard Survey).
1 survey on file · most recent 2001-09-11 (Standard Survey)
25 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| White Sucker | 6.00 | 7–19 in 2001-09-11 | 1.38 lb |
| Yellow Perch | 3.50 | 6 in 2001-09-11 | 0.09 lb |
| Northern Pike | 1.50 | 23 in 2001-09-11 | 3.23 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
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.
White Sucker
Yellow Perch
Northern Pike
From the 2001-09-11 survey
Mueller Lake is in Ecological Lake Class 14, which consists of 92 lakes in northeast Minnesota that are small, shallow, and have very soft (unmineralized) water. Mueller Lake is deeper and has a more irregular shoreline shape than most of the lakes in this lake class. With water chemistry showing total phosphorus of…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Mueller Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — MuellerFisheries Lake Survey · MN DNR LakeFinder
Lake Details
Max depth
36 ft
Surface area
24 acres
Shoreline
1.5 mi
Littoral zone
100%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
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Stays near Mueller Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Mueller Lake
Water Quality Trend: Worsening
Based on 4 years of monitoring (2020–2025).
Water clarity
Worsening4 years
Nearby Lakes in Lake County
Frequently asked questions about Mueller Lake
Where is Mueller Lake?
- Mueller Lake is a lake in Lake County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Mueller Lake?
- Mueller Lake in Lake County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 9 ft visibility. Maximum depth: 36 ft. Surface area: 23.6 acres.
Is Mueller Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Mueller Lake?
- Mueller Lake has a maximum depth of 36 feet. The lake covers 23.6 acres.
What fish are in Mueller Lake?
- Fish species found in Mueller Lake include northern pike, white sucker, yellow perch. Mueller Lake is located in Lake County, Minnesota.
What did the DNR fisheries survey find at Mueller Lake?
- Minnesota DNR's Standard Survey on September 11, 2001 caught 1.50 northern pike per gill net at Mueller Lake. Length samples in the latest survey that recorded them ran 23–23 inches. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mueller Lake’s water-quality measurements separately, and the water-quality trend over 4 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Mueller Lake?
- Public access to Mueller Lake is listed as no on the lake record, so confirm before you make the trip. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
3 measurements from 2 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA3 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (2)
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
Lake details from Minnesota DNR LakeFinder