Mission Lake
Shawano County, Wisconsin25 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Mission Lake. Here is what has been measured.
- Oligotrophic
- 44 ft max depth
Mission Lake in Shawano County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 17.5 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Maximum depth: 44 ft. Surface area: 25 acres.
Wisconsin DNR lists Panfish as common on Mission Lake. DNR survey details →
Mission Lake is a 25-acre cold, clear oligotrophic lake in Shawano County, Wisconsin with a maximum depth of 44 feet. Overall water quality is improving over recent sampling years. The lake supports 2 documented fish species including Panfish and Largemouth Bass. Compared to the 20 other monitored lakes in Shawano County, Mission Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-10-08. Methodology: how these readings are compared.
What Mission Lake is good for
From access and monitoring records, not editorial picks.
- Clear water17.5 ft of visibility
- Deep water44 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Mission Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mission Lake
These are the measurements Wisconsin DNR publishes for Mission Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 17.5 ft down. Phosphorus 17 µg/L. Chlorophyll-a 2.1 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 17.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 17µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 2.1µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Mission Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Mission Lake typically sits around 65°F at the surface in October. Summer average is about 68°F. Usually warmest in Aug (about 77°F) and coldest in May (about 50°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (50°F) to its warmest (77°F).
Typical surface water temperature by month, from 148 field readings (2025–2025) via the EPA Water Quality Portal. See the full Mission Lake water temperature breakdown →
Wisconsin DNR lists Panfish as common on Mission Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mission Lake’s water-quality measurements separately, and the water-quality trend over 2 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2018).
Fish Species (DNR-rated)
Lake Details
Max depth
44 ft
Surface area
25 acres
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Stays near Mission Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Mission Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water quality readings over time
2 seasons of samples on record (2021–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Phosphorus
Improving-1.37 µg/L/yr2 years
Chlorophyll-a
Improving-0.52 µg/L/yr2 years
Nearby Lakes in Shawano County
Frequently asked questions about Mission Lake
Where is Mission Lake?
- Mission Lake is a lake in Shawano County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Mission Lake?
- Mission Lake in Shawano County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 17.5 ft visibility. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Maximum depth: 44 ft. Surface area: 25 acres.
Is Mission Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Mission Lake?
- Mission Lake typically sits around 65°F at the surface in October, from 148 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
How deep is Mission Lake?
- Mission Lake has a maximum depth of 44 feet. The lake covers 25 acres.
What fish are in Mission Lake?
- Fish species found in Mission Lake include Panfish, Largemouth Bass. Mission Lake is located in Shawano County, Wisconsin.
What did the DNR fisheries survey find at Mission Lake?
- Wisconsin DNR lists Panfish as common on Mission Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Mission Lake’s water-quality measurements separately, and the water-quality trend over 2 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Mission Lake across LakeQuality
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Where this data comes from
78 measurements from 1 monitoring station, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Stockbridge_Munsee Community
STOCKBRIDGE_MUNSEE78 samples · 2021–2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Fish and recreation data from Wisconsin DNR Lakes