Mosomo Lake
Itasca County, Minnesota48 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Mosomo Lake. Here is what has been measured.
- Eutrophic
- 30 ft max depth
- Public access
- Limited data
Mosomo Lake in Itasca County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 15.3 µg/L. Maximum depth: 30 ft. Surface area: 48.09 acres.
Minnesota DNR's Standard Survey on August 24, 1983 caught 4.25 walleye per gill net at Mosomo Lake. DNR survey details →
Mosomo Lake is a 48-acre productive, nutrient-rich eutrophic lake in Itasca County, Minnesota with a maximum depth of 30 feet. Limited fish-species data available. Public access is available. Compared to the 71 other monitored lakes in Itasca County, Mosomo Lake ranks #68 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-10-26. Methodology: how these readings are compared.
What Mosomo Lake is good for
From access and monitoring records, not editorial picks.
- Deep water30 ft surveyed max depth
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Mosomo 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 Mosomo Lake
These are the measurements Minnesota PCA publishes for Mosomo 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 4.5 ft. Phosphorus 24 µg/L. Chlorophyll-a 15.3 µg/L. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 24µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 15.3µg/L | Poor GoodFairPoor |
| 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 Mosomo Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Mosomo Lake typically sits around 45°F at the surface in October. Summer average is about 59°F. Usually warmest in Jul (about 60°F) and coldest in Oct (about 45°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (45°F) to its warmest (60°F).
Typical surface water temperature by month, from 218 field readings (2022–2022) via the EPA Water Quality Portal. See the full Mosomo Lake water temperature breakdown →
Minnesota DNR's Standard Survey on August 24, 1983 caught 4.25 walleye per gill net at Mosomo Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mosomo Lake’s water-quality measurements separately. 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: 1983-08-24 (Standard Survey).
1 survey on file · most recent 1983-08-24 (Standard Survey)
43 years old| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Yellow Perch | 78.88 | 0.16 lb | |
| Walleye | 2.25 | 1.15 lb | |
| White Sucker | 0.25 | 2 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.
From the 1983-08-24 survey
PERCH POPULATION VERY HIGH. WALLEYE POPULATION ABOUT AVERAGE.
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Mosomo Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — MosomoFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Mosomo (0662)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — MosomoPublic Water Access Sites · MN DNR LakeFinder
Lake Details
Max depth
30 ft
Surface area
48 acres
Shoreline
1.1 mi
Littoral zone
40%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Elevation
1,325 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Mosomo Lake
Compare lakeside cabins, hotels, and vacation rentals near Mosomo Lake in Itasca County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Mosomo Lake are listed below.
Top-rated places to stay near Mosomo Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
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Fishing Mosomo Lake
Nearby Lakes in Itasca County
Frequently asked questions about Mosomo Lake
Where is Mosomo Lake?
- Mosomo Lake is a lake in Itasca County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Mosomo Lake?
- Mosomo Lake in Itasca County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 4.5 ft visibility. Phosphorus: 24 µg/L. Chlorophyll-a (algae): 15.3 µg/L. Maximum depth: 30 ft. Surface area: 48.09 acres.
Is Mosomo Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Mosomo Lake?
- Mosomo Lake typically sits around 45°F at the surface in October, from 218 EPA Water Quality Portal field readings (2022–2022). That is a typical value for the month, not a live reading.
How deep is Mosomo Lake?
- Mosomo Lake has a maximum depth of 30 feet. The lake covers 48.09 acres.
What did the DNR fisheries survey find at Mosomo Lake?
- Minnesota DNR's Standard Survey on August 24, 1983 caught 4.25 walleye per gill net at Mosomo Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mosomo Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Mosomo Lake?
- Public access to Mosomo Lake is listed as yes on the lake record. 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 Mosomo Lake across LakeQuality
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Where this data comes from
47 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Leech Lake Band of Ojibwe
LEECHLAK_WQX47 samples · 2022
Analytical methods
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Nitrate-Nitrite Nitrogen by Colorimetry
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder