Lower Red Lake : Central
Beltrami County, MinnesotaEutrophic
Lower Red Lake : Central earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. The two scored sub-grades — clarity and phosphorus — track close together, so neither one is dragging the average down.
Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Within the 92 graded lakes of Beltrami County, Lower Red Lake : Central sits at rank 81, near the bottom of the county list.
No invasive species are currently listed at Lower Red Lake : Central — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Lower Red Lake : Central, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-14. Grade methodology: LakeGrade methodology.
Track Lower Red Lake : Central
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 4 ft. Phosphorus level: 36 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4 ft | D |
| Phosphorus | 36 µg/L | C |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.093 m/yr | 6 |
| Phosphorus | ↓ Declining | +1.14 µg/L/yr | 6 |
Location
County Ranking
Ranked #81 of 92 lakes in Beltrami County
Cleaner Lakes Within 30 Miles
Lower Red Lake : Central holds Grade C. 4 nearby lakes hold higher grades.
- ALittle Thunder LakeBeltrami County · mi · Two grade letters higher (C → A)
- AFullers Lake: East BasinBeltrami County · mi · Two grade letters higher (C → A)
- AHeart LakeBeltrami County · mi · Two grade letters higher (C → A)
- ABig Thunder LakeBeltrami County · mi · Two grade letters higher (C → A)
Nearby Lakes in Beltrami County
More Minnesota Lake Rankings
Other Grade C Lakes in Minnesota
Eutrophic Lakes in Minnesota
EPA Impairment Status
Lower Red Lake : Central is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle.
Causes of impairment
Source: EPA ATTAINS assessment unit RLN_LOWER_RED_LAKE · Official waterbody report · Matched by proximity (2.52 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-10-14
Monitoring stations: 1