Roemhildts Lake
Roemhildts Lake in Le Sueur County, Minnesota has a water quality grade of C (Fair). Water clarity: 10.2 ft visibility. Phosphorus: 25.5 µg/L. Chlorophyll-a (algae): 5.3 µg/L. Maximum depth: 60 ft. Surface area: 73.54 acres.
- Clarity
- 10.2 ft
- Typical in August
- 60°F
- Max depth
- 60 ft
- Area
- 74 acres
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Le Sueur County
Roemhildts Lake is a 74-acre mesotrophic lake in Le Sueur County, Minnesota with a maximum depth of 60 feet. Water quality is graded C based on 2 sampling years through 2022. Overall water quality is declining over recent sampling years. The lake supports 13 documented fish species including black crappie, bluegill, and bowfin (dogfish). Public access is available with 1 public boat landing. Compared to the 12 other monitored lakes in Le Sueur County, Roemhildts Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-10-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Good clarity, visible to about 10.2 ft. Phosphorus level: 25.5 µg/L. Chlorophyll-a: 5.3 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.2 ft | Not graded |
| Phosphorus | 25.5 µg/L | Fair |
| Chlorophyll-a (Algae) | 5.3 µg/L | Good |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Roemhildts Lake
Compare lakeside cabins, hotels, and vacation rentals near Roemhildts Lake in Le Sueur 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.
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Water Temperature
Roemhildts Lake typically sits around 60°F at the surface in August. Summer average is about 59°F. Usually warmest in Sep (about 62°F) and coldest in May (about 51°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 67 field readings (2022–2022) via the EPA Water Quality Portal. See the full Roemhildts Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 60 ft |
| Surface Area | 74 acres |
| Shoreline Length | 1.3 mi |
| Littoral Zone | 60% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Roemhildts LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Roemhildts Lake
DNR Fisheries Survey Summary
14 surveys on file from MN DNR Fisheries. Most recent: 2022-07-14 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Largemouth Bass | 30.06 | 0.57 lb |
| Bluegill | 26.08 | 0.15 lb |
| Yellow Perch | 8.43 | 0.1 lb |
| IOD | 4.29 | — |
| Hybrid Sunfish | 3.73 | 0.18 lb |
| Black Crappie | 3.35 | 0.29 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.
Largemouth Bass
Bluegill
Yellow Perch
Hybrid Sunfish
From the 2022-07-14 survey
A targeted survey of nearshore fish species in Roemhildts Lake was conducted on July 12, 2022, by DNR Fisheries staff. Ten sampling sites were evenly spaced around the lake, and each was sampled by backpack electrofishing and seining with a 50-foot or 15-foot seine, where possible. Backpack electrofishing was…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Roemhildts Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — RoemhildtsFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Roemhildts (1390)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — RoemhildtsPublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.075 m/yr | 4 |
| Phosphorus | ↓ Declining | +7.32 µg/L/yr | 3 |
| Chlorophyll-a | ↓ Declining | +17.06 µg/L/yr | 3 |
EPA Impairment Status
Roemhildts Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN40-0063-00 · Official waterbody report · Matched by proximity (2.19 km)
County Ranking
Ranked #2 of 13 lakes in Le Sueur County
Nearby Lakes in Le Sueur County
Frequently asked questions about Roemhildts Lake
What is the water quality grade for Roemhildts Lake?
- Roemhildts Lake in Le Sueur County, Minnesota has a water quality grade of C (Fair). Water clarity: 10.2 ft visibility. Phosphorus: 25.5 µg/L. Chlorophyll-a (algae): 5.3 µg/L. Maximum depth: 60 ft. Surface area: 73.54 acres.
Is Roemhildts Lake safe to swim in?
- Generally safe for swimming, moderate water quality. Roemhildts Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 5.3 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Roemhildts Lake?
- Roemhildts Lake typically sits around 60°F at the surface in August, from 67 EPA Water Quality Portal field readings (2022–2022). That is a typical value for the month, not a live reading.
How deep is Roemhildts Lake?
- Roemhildts Lake has a maximum depth of 60 feet. The lake covers 73.54 acres.
What fish are in Roemhildts Lake?
- Fish species found in Roemhildts Lake include black crappie, bluegill, bowfin (dogfish), brown bullhead, common carp, freshwater drum, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, yellow bullhead, yellow perch. Roemhildts Lake is located in Le Sueur County, Minnesota.
Are there boat ramps on Roemhildts Lake?
- Roemhildts Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Roemhildts Lake. Public access is listed as yes.
Explore Roemhildts Lake across LakeGrade
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Where this data comes from
19 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA19 samples · 2022
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- Phosphorus by 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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory