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C

Moody Lake

Oconto County, WisconsinEutrophic

Moody Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

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. Moody Lake ranks 57 of 62 in Oconto County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Moody Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Moody Lake, 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, Wisconsin DNR Surface Water, last sampled 2023-08-23. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 5 ft. Phosphorus level: 44.1 µg/L. Trophic State Index: 56.

MetricValueGrade
Water Clarity (Secchi Depth)5 ftD
Phosphorus44.1 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)56Eutrophic

High nutrients, frequent algae, reduced clarity

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Stable+0.161 m/yr4
Phosphorus Improving-0.41 µg/L/yr6
See year-by-year chart →

Recreation & Access

2
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #57 of 62 lakes in Oconto County

Cleaner Lakes Within 30 Miles

Moody Lake holds Grade C. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Oconto County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Public boat-access points from the USGS National Boat Ramps inventory

Most recent sample: 2023-08-23

Monitoring stations: 1

Where to stay near Moody Lake

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