Skip to main content
LakeQuality
A

Munger Lake

Oconto County, WisconsinOligotrophic

On the LakeGrade rubric, Munger Lake pulls an A: clarity at 23.0 ft and 16 µg/L of phosphorus put it in the top bracket for Wisconsin. 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.

Trophically, Munger Lake reads as oligotrophic — nutrient-poor, clear, and ecologically more sensitive to disturbance than richer lakes. A maximum depth of 19 ft puts Munger Lake in the middle of Wisconsin's depth distribution. Munger Lake is small — 89 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Munger Lake ranks 16 of 66 in Oconto County, putting it in the upper tier of locally monitored lakes.

Munger Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The fishery is bass-led, with 4 documented species across the lake's records. Public access is available — the lake is on the Wisconsin DNR public-access list. 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 2025-08-24. Grade methodology: LakeGrade methodology.

Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 23 ft down. Phosphorus level: 15.6 µg/L. Trophic State Index: 38.

MetricValueGrade
Water Clarity (Secchi Depth)23 ftA
Phosphorus15.6 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)38Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth19 ft
Surface Area89 acres
Public AccessYes

Fish Species

Click a species to see all Wisconsin and Minnesota lakes where it is found.

→ Best fishing times for Munger Lake (14-day solunar calendar)

→ Is it safe to eat fish from Munger Lake? (mercury & PFAS guide)

Munger Lake fishing regulations (limits, seasons, special rules)

Invasive Species

Banded Mystery SnailChinese Mystery SnailEurasian Water-Milfoil

Water Quality Trend: Declining

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

MetricTrendChange/YearYears
Water Clarity Declining-0.207 m/yr6
Phosphorus Stable+0.08 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

Loading map…

County Ranking

Ranked #16 of 66 lakes in Oconto County

Nearby Lakes in Oconto County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2005. 1 station on file (most recent sample 2025).

DNR Assessment
Excellent · Shallow Headwater lake
Trophic State Index 40 (oligotrophic) · 5-year average

Fish Species (DNR-rated)

Northern Pike(Common)Musky(Present)Panfish(Present)Largemouth Bass(Present)

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2025-08-24

Monitoring stations: 1