Pomerleau Lake
Pomerleau Lake in Hennepin County, Minnesota has a water quality grade of A (Excellent). Water clarity: 10.3 ft visibility. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 3.9 µg/L. Maximum depth: 26 ft. Surface area: 25.69 acres.
- Clarity
- 10.3 ft
- Typical in August
- 66°F
- Max depth
- 26 ft
- Area
- 26 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- No
Next lake in Hennepin County
Pomerleau Lake is a 26-acre mesotrophic lake in Hennepin County, Minnesota with a maximum depth of 26 feet (9-foot average). Water quality is graded A based on 2 sampling years through 2021. Overall water quality is improving over recent sampling years. The lake supports 5 documented fish species including black bullhead, black crappie, and bluegill. No public access — the lake is private or restricted. Compared to the 80 other monitored lakes in Hennepin County, Pomerleau Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-09-28. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Good clarity, visible to about 10.3 ft. Phosphorus level: 20.5 µg/L. Chlorophyll-a: 3.9 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.3 ft | Not graded |
| Phosphorus | 20.5 µg/L | Good |
| Chlorophyll-a (Algae) | 3.9 µg/L | Good |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Pomerleau Lake
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Water Temperature
Pomerleau Lake typically sits around 66°F at the surface in August. Summer average is about 65°F. Usually warmest in Jul (about 66°F) and coldest in Apr (about 53°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 385 field readings (2016–2021) via the EPA Water Quality Portal. See the full Pomerleau Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 26 ft |
| Average Depth | 9 ft |
| Surface Area | 26 acres |
| Shoreline Length | 0.8 mi |
| Littoral Zone | 77% |
| Public Access | No |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Pomerleau Lake
DNR Fisheries Survey Summary
2 surveys on file from MN DNR Fisheries. Most recent: 1994-07-05 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Green Sunfish | 566.17 | 0.11 lb |
| Largemouth Bass | 19.83 | 0.05 lb |
| Brown Bullhead | 17.67 | 0.39 lb |
| Hybrid Sunfish | 12.00 | 0.23 lb |
| Black Bullhead | 6.25 | 0.24 lb |
| Black Crappie | 5.78 | 0.14 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
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.
Green Sunfish
Largemouth Bass
Black Bullhead
Black Crappie
From the 1994-07-05 survey
Green sunfish are by far the most abundant in this lake. They were netted at over 125 times the average when compared to similar lakes. Largemouth bass were also sampled at high levels. However they only averaged 4.9 inches in length. Black crappies and black bullheads were sampled in average numbers. The mean length…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Pomerleau Lake. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — PomerleauFisheries Lake Survey · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.43 m/yr | 2 |
| Phosphorus | ↑ Improving | -3.5 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -0.9 µg/L/yr | 2 |
County Ranking
Ranked #2 of 81 lakes in Hennepin County
Nearby Lakes in Hennepin County
Frequently asked questions about Pomerleau Lake
What is the water quality grade for Pomerleau Lake?
- Pomerleau Lake in Hennepin County, Minnesota has a water quality grade of A (Excellent). Water clarity: 10.3 ft visibility. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 3.9 µg/L. Maximum depth: 26 ft. Surface area: 25.69 acres.
Is Pomerleau Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Pomerleau Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 3.9 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Pomerleau Lake?
- Pomerleau Lake typically sits around 66°F at the surface in August, from 385 EPA Water Quality Portal field readings (2016–2021). That is a typical value for the month, not a live reading.
How deep is Pomerleau Lake?
- Pomerleau Lake has a maximum depth of 26 feet and an average depth of 9 feet. The lake covers 25.69 acres.
What fish are in Pomerleau Lake?
- Fish species found in Pomerleau Lake include black bullhead, black crappie, bluegill, green sunfish, largemouth bass. Pomerleau Lake is located in Hennepin County, Minnesota.
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Where this data comes from
80 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA80 samples · 2020–2021
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake details from Minnesota DNR LakeFinder