Ferrell Lake
Morrison County, MinnesotaView mapDirections
Minnesota PCA publishes the water-quality measurements for Ferrell Lake. Here is what has been measured.
- 27 ft max depth
- Limited data
Ferrell Lake in Morrison County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 9.8 ft visibility.
Ferrell Lake is a lake in Morrison County, Minnesota with an estimated average depth of about 27 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-08-19. Methodology: how these readings are compared.
What Ferrell Lake is good for
From access and monitoring records, not editorial picks.
- Clear water9.8 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Ferrell 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 Ferrell Lake
These are the measurements Minnesota PCA publishes for Ferrell 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 9.8 ft. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9.8ft | 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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Ferrell Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Ferrell Lake typically sits around 70°F at the surface in September. Summer average is about 74°F. Usually warmest in Jul (about 77°F) and coldest in May (about 65°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (65°F) to its warmest (77°F).
Typical surface water temperature by month, from 64 field readings (2021–2025) via the EPA Water Quality Portal. See the full Ferrell Lake water temperature breakdown →
Lake Details
Max depth
~27 ft est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Minnesota has not published bathymetry for Ferrell Lake.
Lake Size & Watershed
Watershed (drainage) area
0 sq mi
HydroLAKES / HydroSHEDS
Surface area
47 acres
HydroLAKES / HydroSHEDS
Shoreline
1.4 mi
HydroLAKES / HydroSHEDS
Elevation
1,211 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Stays via Stay22
Stays near Ferrell Lake
Compare lakeside cabins, hotels, and vacation rentals near Ferrell Lake in Morrison 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.
Top-rated places to stay near Ferrell Lake
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Fishing Ferrell Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Ferrell Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Camp Ripley WwtpLittle Falls · 0.8 mi away · NPDES MN0025721Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Morrison County
Frequently asked questions about Ferrell Lake
Where is Ferrell Lake?
- Ferrell Lake is a lake in Morrison County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Ferrell Lake?
- Ferrell Lake in Morrison County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 9.8 ft visibility.
Is Ferrell 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 Ferrell Lake?
- Ferrell Lake typically sits around 70°F at the surface in September, from 64 EPA Water Quality Portal field readings (2021–2025). That is a typical value for the month, not a live reading.
How deep is Ferrell Lake?
- No published bathymetric survey covers Ferrell Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 27 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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Where this data comes from
42 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA42 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- 10200 H ~ Chlorophyll a-b-c Determination
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder