Iverson Lake
Iverson Lake in Otter Tail County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13.8 ft visibility. Maximum depth: 18 ft. Surface area: 67.87 acres.
- Clarity
- 13.8 ft
- Max depth
- 18 ft
- Area
- 68 acres
- Public access
- No
Next lake in Otter Tail County
Why Iverson Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Iverson Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Iverson Lake is a 68-acre lake in Otter Tail County, Minnesota with a maximum depth of 18 feet. The lake supports 6 documented fish species including black bullhead, bluegill, and northern pike. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-08-08. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Iverson Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Good clarity, visible to about 13.8 ft. Trophic State Index: 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Iverson Lake
Compare lakeside cabins, hotels, and vacation rentals near Iverson Lake in Otter Tail 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 Iverson Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 18 ft |
| Surface Area | 68 acres |
| Shoreline Length | 1.6 mi |
| Littoral Zone | 91% |
| Public Access | No |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Iverson Lake
DNR Fisheries Survey Summary
1 survey on file from MN DNR Fisheries. Most recent: 1985-06-12 (Standard Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 376.33 | 0.08 lb |
| Pumpkinseed | 22.75 | 0.08 lb |
| Yellow Bass | 4.67 | 0.47 lb |
| Walleye | 3.00 | 1.91 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
From the 1985-06-12 survey
Bluegill catch per trap net lift increased from 34.3 per net in the 1982 survey to 690.0 per net. Average weight per bluegill decreased from 0.22 lb. in 1982 to .09 lb. Walleye fry stocking has been very successful. The 1981 and 1983 year classes were well represented in the sample. Average weight of walleye was just…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Iverson Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — IversonFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — IversonFish Stocking History · MN DNR LakeFinder
EPA Impairment Status
Iverson 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 MN56-0781-00 · Official waterbody report · Matched by proximity (2.91 km)
Graded lakes near Iverson Lake
Iverson Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Otter Tail County
Frequently asked questions about Iverson Lake
What is the water quality grade for Iverson Lake?
- Iverson Lake in Otter Tail County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13.8 ft visibility. Maximum depth: 18 ft. Surface area: 67.87 acres.
Is Iverson Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Iverson Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Iverson Lake?
- Iverson Lake has a maximum depth of 18 feet. The lake covers 67.87 acres.
What fish are in Iverson Lake?
- Fish species found in Iverson Lake include black bullhead, bluegill, northern pike, pumpkinseed, walleye, yellow perch. Iverson Lake is located in Otter Tail County, Minnesota.
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Where this data comes from
2 measurements from 2 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Department of Agriculture - Pesticide Monitoring
MNDA_PESTICIDE1 sample · 2022 - Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2022
Analytical methods
- Field measurement/observation, generic method
Monitoring station identifiers (2)
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