King Lake
Marinette County, Wisconsin30 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for King Lake. Here is what has been measured.
- Oligotrophic
- 70 ft max depth
King Lake in Marinette County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 0.8 µg/L. Maximum depth: 70 ft. Surface area: 30 acres.
Wisconsin DNR lists Largemouth Bass as common on King Lake. DNR survey details →
King Lake is a 30-acre cold, clear oligotrophic lake in Marinette County, Wisconsin with a maximum depth of 70 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 9 other monitored lakes in Marinette County, King Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-11-20. Methodology: how these readings are compared.
What King Lake is good for
From access and monitoring records, not editorial picks.
- Deep water70 ft surveyed max depth
Swimming conditions
Readings onlyBacteria tested: low
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.
Based on E. coli testing, King Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 15 samples across 5 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Wisconsin’s current beach and health-department advisories before swimming.
Whether King 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 King Lake
These are the measurements Wisconsin DNR publishes for King Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 9 µg/L. Chlorophyll-a 0.8 µg/L. TSI 32.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 9µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 0.8µg/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. | 32 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about King Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
King Lake typically sits around 50°F at the surface in October. Summer average is about 51°F. Usually warmest in Sep (about 55°F) and coldest in Apr (about 42°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (42°F) to its warmest (55°F).
Typical surface water temperature by month, from 287 field readings (2024–2025) via the EPA Water Quality Portal. See the full King Lake water temperature breakdown →
Wisconsin DNR lists Largemouth Bass as common on King Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows King Lake’s water-quality measurements separately, and the water-quality trend over 6 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.
Fish Species (DNR-rated)
Lake Details
Max depth
70 ft
Surface area
30 acres
Lake Size & Watershed
Watershed (drainage) area
0 sq mi
HydroLAKES / HydroSHEDS
Shoreline
0.9 mi
HydroLAKES / HydroSHEDS
Elevation
1,289 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near King Lake
Compare lakeside cabins, hotels, and vacation rentals near King Lake in Marinette County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near King Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
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Fish Species
Click a species to see every lake where it is documented.
Fishing King Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Phosphorus
Stable+0.17 µg/L/yr6 years
Chlorophyll-a
Improving-0.05 µg/L/yr6 years
Nearby Lakes in Marinette County
Frequently asked questions about King Lake
Where is King Lake?
- King Lake is a lake in Marinette County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of King Lake?
- King Lake in Marinette County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Phosphorus: 9 µg/L. Chlorophyll-a (algae): 0.8 µg/L. Maximum depth: 70 ft. Surface area: 30 acres.
Is King Lake safe to swim in?
- Based on E. coli testing, King Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 15 samples across 5 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether King Lake is safe to swim in today is a call for Wisconsin's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of King Lake?
- King Lake typically sits around 50°F at the surface in October, from 287 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is King Lake?
- King Lake has a maximum depth of 70 feet. The lake covers 30 acres.
What fish are in King Lake?
- Fish species found in King Lake include Panfish, Largemouth Bass. King Lake is located in Marinette County, Wisconsin.
What did the DNR fisheries survey find at King Lake?
- Wisconsin DNR lists Largemouth Bass as common on King Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows King Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore King Lake across LakeQuality
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Where this data comes from
79 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Forest County Potawatomi Community (Tribal)
FCPOTAWATOMI_WQX79 samples · 2020–2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P F ~ Phosphorus in Water by Colorimetry Automated 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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes