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LakeQuality
B

Moody Lake

Oconto County, WisconsinMesotrophic

Moody Lake carries a solid B grade — strong on most parameters, with measurements that hold up well across the summer season. High phosphorus is the leading drag on the score — likely from upland agriculture, lawn runoff, or in-lake sediment release.

Mesotrophic conditions dominate at Moody Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. 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 60 of 66 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.

Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Crystal clear, you can see 16.4 ft down. Phosphorus level: 44.1 µg/L. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)16.4 ftA
Phosphorus44.1 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Improving

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable-0.033 m/yr5
Phosphorus Improving-0.41 µg/L/yr6
See year-by-year chart →

Location

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County Ranking

Ranked #60 of 66 lakes in Oconto County

Cleaner Lakes Within 30 Miles

Moody Lake holds Grade B. 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

Most recent sample: 2023-08-23

Monitoring stations: 1