Loeb Lake
Ramsey County, Minnesota9 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Loeb Lake. Here is what has been measured.
- Mesotrophic
- Eurasian watermilfoil
- 28 ft max depth
Loeb Lake in Ramsey County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 11.2 ft visibility. Phosphorus: 29 µg/L. Chlorophyll-a (algae): 4 µg/L. Maximum depth: 28 ft. Surface area: 8.52 acres.
Minnesota DNR's Standard Survey on July 21, 2024 caught 22.00 black crappie per gill net at Loeb Lake. Length samples in the latest survey that recorded them ran 4–8 inches. DNR survey details →
Loeb Lake is a 9-acre mesotrophic lake in Ramsey County, Minnesota with a maximum depth of 28 feet. Overall water quality is declining over recent sampling years. The lake supports 6 documented fish species including black bullhead, black crappie, and bluegill. No public access — the lake is private or restricted. Compared to the 43 other monitored lakes in Ramsey County, Loeb Lake ranks #14 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-01. Methodology: how these readings are compared.
Loeb Lake covers about 9 acres in Ramsey County. Vrbo is where to look for cabins and lake homes around Loeb Lake, and Booking.com and Expedia search hotels near the lake for your dates.
What Loeb Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11.2 ft of visibility
- Fishing6 species recorded
Swimming conditions
Readings onlyModerate algae
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 Loeb 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 Loeb Lake
These are the measurements Minnesota PCA publishes for Loeb Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 11.2 ft. Phosphorus 29 µg/L. Chlorophyll-a 4 µg/L. TSI 46.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 29µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 4µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Loeb Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Loeb Lake typically sits around 57°F at the surface in October. Summer average is about 60°F. Usually warmest in Aug (about 63°F) and coldest in Mar (about 40°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (40°F) to its warmest (63°F).
Typical surface water temperature by month, from 738 field readings (2010–2025) via the EPA Water Quality Portal. See the full Loeb Lake water temperature breakdown →
Minnesota DNR's Standard Survey on July 21, 2024 caught 22.00 black crappie per gill net at Loeb Lake. Length samples in the latest survey that recorded them ran 4–8 inches.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Loeb Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
7 surveys on file from MN DNR Fisheries. Most recent: 2024-07-21 (Standard Survey).
7 surveys on file · most recent 2024-07-21 (Standard Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Bluegill | 26.18 | 2–5 in 2024-07-21 | 0.11 lb |
| Black Bullhead | 8.53 | 4–6 in 2024-07-21 | 0.3 lb |
| Brown Bullhead | 8.50 | 0.24 lb | |
| Black Crappie | 5.26 | 4–8 in 2024-07-21 | 0.12 lb |
| Walleye | 4.52 | 8–10 in 2014-07-21 | 1.44 lb |
| Pumpkinseed | 3.99 | 4–5 in 2014-07-21 | 0.09 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.
Bluegill
Black Bullhead
Black Crappie
Walleye
From the 2024-07-21 survey
Loeb Lake is a small 8.5-acre (7.6 littoral acre), class 30 lake located entirely within Marydale Park in the City of St. Paul. There is on-street parking, a walking path around the lake, a playground, and picnic tables/grills. The lake is rather deep for its size, with a maximum depth of 28 feet. The water is clear…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Loeb Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — LoebFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — LoebFish Stocking History · MN DNR LakeFinder
Lake Details
Max depth
28 ft
Surface area
9 acres
Shoreline
0.5 mi
Littoral zone
89%
Share shallower than 15 ft
Public access
No
Listed by Minnesota PCA
Stays via Stay22
Stays near Loeb Lake
Compare lakeside cabins, hotels, and vacation rentals near Loeb Lake in Ramsey 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 Loeb Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Loeb Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+5.67 µg/L/yr6 years
Chlorophyll-a
Worsening+1.47 µg/L/yr6 years
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Loeb Lake under Clean Water Act (NPDES) discharge permits.
- Viking Gas TransmissionSaint Paul · 1.1 mi away · NPDES MN0060755
- Nea Galtier LlcSaint Paul, City Of · 2.5 mi away · NPDES MN0062031
- Metropolitan CouncilSaint Paul · 2.5 mi away · NPDES MN0070131
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 Ramsey County
Frequently asked questions about Loeb Lake
Where is Loeb Lake?
- Loeb Lake is a lake in Ramsey County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Loeb Lake?
- Loeb Lake in Ramsey County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 11.2 ft visibility. Phosphorus: 29 µg/L. Chlorophyll-a (algae): 4 µg/L. Maximum depth: 28 ft. Surface area: 8.52 acres.
Is Loeb 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 Loeb Lake?
- Loeb Lake typically sits around 57°F at the surface in October, from 738 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
How deep is Loeb Lake?
- Loeb Lake has a maximum depth of 28 feet. The lake covers 8.52 acres.
What fish are in Loeb Lake?
- Fish species found in Loeb Lake include black bullhead, black crappie, bluegill, green sunfish, hybrid sunfish, yellow bullhead. Loeb Lake is located in Ramsey County, Minnesota.
What did the DNR fisheries survey find at Loeb Lake?
- Minnesota DNR's Standard Survey on July 21, 2024 caught 22.00 black crappie per gill net at Loeb Lake. Length samples in the latest survey that recorded them ran 4–8 inches. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Loeb Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Loeb Lake?
- Public access to Loeb 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 Loeb Lake across LakeQuality
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Where this data comes from
780 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
MNPCA780 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Colorimetry
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 2130 B ~ Nephelometric Method
- Turbidity by Nephelometry
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 details from Minnesota DNR LakeFinder