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B

Munger Lake

Oconto County, WisconsinMesotrophic

Munger Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. Secchi readings are the weakest of the three parameters, suggesting suspended sediment or algal biomass dominates the optical signal.

A TSI near 46 places Munger Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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 sits at rank 45 of 62 in Oconto County, in the lower half of the local distribution.

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 2026-06-14. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7 ft. Phosphorus level: 15.6 µg/L. Trophic State Index: 46.

MetricValueGrade
Water Clarity (Secchi Depth)7 ftC
Phosphorus15.6 µg/LA
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)46Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Maximum Depth19 ft
Surface Area89 acres
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

→ 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 & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Banded Mystery SnailChinese Mystery SnailEurasian Water-Milfoil

Water Quality Trend: Improving

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

MetricTrendChange/YearYears
Water Clarity Improving+2.329 m/yr6
Phosphorus Stable+0.08 µg/L/yr6
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #45 of 62 lakes in Oconto County

Cleaner Lakes Within 30 Miles

Munger Lake holds Grade B. 5 nearby lakes hold higher grades.

See full comparison →

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

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

Most recent sample: 2026-06-14

Monitoring stations: 1

Where to stay near Munger Lake

Compare lakeside cabins, hotels, and vacation rentals near Munger Lake in Oconto County, Wisconsin — live availability and prices for your trip.

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