North Hegman Lake
North Hegman Lake in St. Louis County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.5 ft visibility. Maximum depth: 30 ft. Surface area: 70.03 acres.
- Clarity
- 6.5 ft
- Max depth
- 30 ft
- Area
- 70 acres
- Trend
- ↑ Improving
- Public access
- No
Next lake in St. Louis County
Why North Hegman 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 North Hegman 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.
North Hegman Lake is a 70-acre lake in St. Louis County, Minnesota with a maximum depth of 30 feet. Overall water quality is improving over recent sampling years. The lake supports 5 documented fish species including northern pike, pumpkinseed, and smallmouth bass. No public access — the lake is private or restricted.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-06-14. 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 North Hegman Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 6.5 ft. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near North Hegman Lake
Compare lakeside cabins, hotels, and vacation rentals near North Hegman Lake in St. Louis 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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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 30 ft |
| Surface Area | 70 acres |
| Shoreline Length | 3.8 mi |
| Littoral Zone | 86% |
| Public Access | No |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing North Hegman Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.283 m/yr | 2 |
EPA Impairment Status
North Hegman Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MN69-0080-00 · Official waterbody report · Matched by proximity (2.87 km)
Graded lakes near North Hegman Lake
North Hegman Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in St. Louis County
Frequently asked questions about North Hegman Lake
What is the water quality grade for North Hegman Lake?
- North Hegman Lake in St. Louis County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.5 ft visibility. Maximum depth: 30 ft. Surface area: 70.03 acres.
Is North Hegman Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. North Hegman 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 North Hegman Lake?
- North Hegman Lake has a maximum depth of 30 feet. The lake covers 70.03 acres.
What fish are in North Hegman Lake?
- Fish species found in North Hegman Lake include northern pike, pumpkinseed, smallmouth bass, walleye, white sucker. North Hegman Lake is located in St. Louis County, Minnesota.
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Where this data comes from
1 measurement from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA1 sample · 2025
Analytical methods
- Field measurement/observation, generic method
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 details from Minnesota DNR LakeFinder