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Peppermill Lake
Enhanced dataInteractive depth contours
Peppermill LakeAdams County, WI
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Interactive depth contours5-foot typical interval · Modeled depth estimate · Not a survey · Not for navigation
Source: LakeList depth modelmedium confidence · QA passed · Select a contour to inspect its mapped depthModeled depth estimate: contours computed from the lake's shoreline shape and its documented 12-ft maximum depth (depth grows with distance from shore, calibrated to the documented mean depth where available). This is a smooth mathematical model, not a survey - real holes, bars, and drop-offs will differ. Community sonar (C-MAP Genesis) overlays where recorded. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Peppermill Lake.
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Fishing forecast
Best windows for Peppermill Lake
Weather-based planning built from the National Weather Service hourly forecast near this lake.
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Checking wind, precipitation, and near-term weather windows.
Water temperature
Peppermill Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
78°FPeak summer
Seasonal estimate. Checking current National Weather Service air temperatures…
Warmest water of the year. Fish hold deeper or feed in low light; swimming and watersports are at their best.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Peppermill Lake - Deepest Point.
Sampled Aug 2025Volunteer monitoring since 1999
High algae readings and moderate nutrients in the most recent monitored summers.
Based on July–August volunteer averages from 2021–2022; each value shows its own year.AlgaeChlorophyll-a
23.3 µg/LJul–Aug 2022 avg (3 readings)
HighWorsening — up ~1196% vs earlier years
NutrientsTotal phosphorus — fuels plant & algae growth
21 µg/LJul–Aug 2021 avg (2 readings)
ModerateModerate phosphorus can support noticeable plant/algae growth.
No recent clarity readings — last measured 2020.
All readings by year · station details · methodology
Summer averages (July/August)
July/August means; counts in parentheses show how many samples went into each average.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2025 | — | 175.0 µg/L (1) | — |
| 2023 | — | 9.0 µg/L (1) | 27.0 µg/L (1) |
| 2022 | 7.0 ft (1) | 23.3 µg/L (3) | — |
| 2021 | — | 10.5 µg/L (2) | 21.0 µg/L (2) |
| 2020 | 9.5 ft (2) | 2.5 µg/L (2) | — |
| 2019 | 11.0 ft (1) | 3.0 µg/L (1) | — |
| 2018 | 7.5 ft (1) | 3.0 µg/L (1) | — |
| 2017 | 8.3 ft (2) | 4.0 µg/L (2) | — |
| 2016 | 7.7 ft (2) | 7.0 µg/L (2) | — |
| 2015 | 8.5 ft (2) | 14.0 µg/L (2) | — |
Latest individual samples: Secchi 8 ft (2024-06-25), chlorophyll-a 175 µg/L (2025-08-01), and total phosphorus 27 µg/L (2023-08-18).
Secchi clarity is how deep a black-and-white disk stays visible from the surface — more feet means clearer water.
Chlorophyll-a is an algae pigment; higher values signal more algae in the water column.
Total phosphorus is a nutrient that feeds algae and aquatic plants. It is not a weed survey — depth, bottom type, water movement, and management change the actual lake experience.
Peppermill Lake - Deepest PointStation 013144
Modeled from DNR/CLMN monitoring — not a safety or swim-condition report. Verify current conditions locally. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps1 converted map sheetView DNR depth mapHistorical map · not for navigationFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Peppermill Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Peppermill Lake · sheet 1
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 178700 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
Wisconsin DNR fisheries survey
Fish population survey
Structured LakeList extraction from the 2022 DNR fisheries survey. Population estimates, density, and catch-rate indices use different units, methods, and scopes, so each value is presented in its original form rather than normalized against a different measure.
Survey indicatorsValues keep their source unit and method; unlike measures are not scaled or compared.
Management contextThe report is specific to Peppermill Lake. Bluegill metrics use one mile of panfish electrofishing; largemouth bass metrics use 2.5 miles of gamefish electrofishing.
The 2022 electrofishing survey described a healthy largemouth bass and bluegill fishery, with high largemouth bass abundance and size structure and normal bluegill abundance with good size structure.
- The largemouth bass narrative reports 53.2 fish per mile while the adjacent summary box rounds the rate to 54; LakeList retains the more precise narrative value.
Bluegill
72 fish/mileBluegill CPUE · p. 12.5 inchesMinimum length · p. 18.4 inchesMaximum length · p. 15.1 inchesAverage length · p. 1
Largemouth bass
53.2 fish/mileLargemouth bass CPUE · p. 213.4 inchesAverage length · p. 278 percentShare at least 12 inches · p. 223 percentShare at least 15 inches · p. 2
Peppermill Lake spring shocking survey, 2022Matched by exact lakelist id name county state wbic · WBICs 178700 · verified 2026-07-19Wisconsin DNR fisheries survey report; LakeList operator documented permission to leverage this report with source attribution.
53surface acres
12max depth feet
1public access points
43.7882, -89.6483latitude, longitude
Access
Public access points
Boat launchAccess43.78821, -89.63979Managed by Wisconsin DNR
DNR verifiedDirections
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassMuskyNorthern PikePanfish
Depth FAQ
How deep is Peppermill Lake?
Peppermill Lake is 12 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Peppermill Lake?
Yes. LakeList publishes a free interactive depth contour map of Peppermill Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Peppermill Lake depth map come from?
The interactive depth contours are derived from LakeList depth model. Each contour set passes a visual QA review against the source document before it is published. The depths are a modeled estimate calibrated to the lake's documented maximum depth - not a survey, and not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14
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