Mudro Lake
St. Louis County, Minnesota94 acresView mapDirections
No nutrient or algae sampling on record from Minnesota PCA for this lake.
- Impaired · Mercury
- 76 ft max depth
- Limited data
Mudro Lake in St. Louis County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 76 ft. Surface area: 93.64 acres.
Mudro Lake is a 94-acre lake in St. Louis County, Minnesota with a maximum depth of 76 feet. The lake supports 7 documented fish species including burbot, cisco species, and northern pike. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-29. Methodology: how these readings are compared.
What Mudro Lake is good for
From access and monitoring records, not editorial picks.
- Fishing7 species recorded
- Deep water76 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Mudro Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Mudro 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 Mudro Lake
These are the measurements Minnesota PCA publishes for Mudro Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Mudro Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Mudro Lake typically sits around 49°F at the surface in August. Summer average is about 49°F. Usually warmest in Jul (about 50°F) and coldest in Jun (about 47°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (47°F) to its warmest (50°F).
Typical surface water temperature by month, from 162 field readings (2019–2025) via the EPA Water Quality Portal. See the full Mudro Lake water temperature breakdown →
Lake Details
Max depth
76 ft
Surface area
94 acres
Shoreline
3.5 mi
Littoral zone
26%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,368 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Mudro Lake
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Top-rated places to stay near Mudro Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Mudro Lake
EPA Impairment Status
Mudro Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit MN69-0078-00 · Official waterbody report
Nearby Lakes in St. Louis County
Frequently asked questions about Mudro Lake
Where is Mudro Lake?
- Mudro Lake is a lake in St. Louis County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Mudro Lake?
- Mudro Lake in St. Louis County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Maximum depth: 76 ft. Surface area: 93.64 acres.
Is Mudro Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mudro Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
What is the water temperature of Mudro Lake?
- Mudro Lake typically sits around 49°F at the surface in August, from 162 EPA Water Quality Portal field readings (2019–2025). That is a typical value for the month, not a live reading.
How deep is Mudro Lake?
- Mudro Lake has a maximum depth of 76 feet. The lake covers 93.64 acres.
What fish are in Mudro Lake?
- Fish species found in Mudro Lake include burbot, cisco species, northern pike, smallmouth bass, tullibee (cisco), walleye, white sucker. Mudro Lake is located in St. Louis County, Minnesota.
Can I fish at Mudro Lake?
- Public access to Mudro 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.
Explore Mudro Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2025
Analytical methods
- Field measurement/observation, generic method
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder