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C

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.

Reviewed by LakeQuality Editorial Team · Updated

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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.

MetricValueGrade
Water Clarity (Secchi Depth)4 ftD
Phosphorus36 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)56Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Stable

Based on 6 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Improving+0.093 m/yr6
Phosphorus Declining+1.14 µg/L/yr6
See year-by-year chart →

Location

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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.

See full comparison →

Nearby Lakes in Beltrami County

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

Nutrients (phosphorus, nitrogen)

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