Door County Lake Quality
Wisconsin, 8 lakes, average grade B (Good)
Only 8 lakes in Door County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. With an average grade of B, Door County sits comfortably above the Wisconsin median.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Europe Lake (B) is the cleanest in the county.
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Quick Answers for Door County
Planning a trip? Check special fishing regulations for Europe Lake, whether the fish are safe to eat, and the best times to fish — or browse the full Wisconsin regulations index.
Fishing in Door County
DNR Reports (7)
Wisconsin DNR Fisheries Survey resources for lakes in Door County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2024Forestville Millpond spring shocking survey, 2024Spring Shocking Survey · WI DNR · 2024 (PDF)
- 2023Europe Lake comprehensive survey, 2023Comprehensive Survey · WI DNR · 2023 (PDF)
- 2023The smallmouth bass sport fishery, Rowley Bay, 2016, 2018, 2023Fisheries Survey · WI DNR · 2023 (PDF)
- 2022The smallmouth bass sport fishery, Washington Island/Detroit Harbor, 2014, 2022Fisheries Survey · WI DNR · 2022 (PDF)
- 2021The smallmouth bass sport fishery in Sturgeon Bay/Little Sturgeon Bay, 2017, 2021Fisheries Survey · WI DNR · 2021 (PDF)
- 2016Forestville Millpond Fish Survey 2016Fisheries Survey · WI DNR · 2016 (PDF)
- —Smallmouth bass assessments in Door County, 2009-2012Fisheries Survey · WI DNR (PDF)
All Lakes in Door County
8 lakes · 5 graded, 3 not rated5 graded lakes · 3 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| 1 | BEurope LakeDoor | B | 6.5 ft | 12.2 µg/L | No recent samples | No recent samples | 10 ft | ✓ Public |
| 2 | BClark LakeDoor | B | 12.5 ft | 10.5 µg/L | No recent samples | No recent samples | 25 ft | ✓ Public |
| 3 | BKangaroo LakeDoor | B | 8.8 ft | 13.2 µg/L | No recent samples | No recent samples | 12 ft | ✓ Public |
| 4 | BDunes LakeDoor | B | 4 ft | 21.2 µg/L | No recent samples | No recent samples | 1 ft | Not recorded |
| 5 | DForestville MillpondDoor | D | 3 ft | 94.3 µg/L | No recent samples | No recent samples | 5 ft | ✓ Public |
| NRForestville Flowage LakeDoor | NR | 1 ft | No recent samples | No recent samples | No recent samples | 5 ft | ✓ Public | |
| NRDunes Lake Just Us of OutletDoor | NR | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | ✓ Public | |
| NRInlet To Dunes LakeDoor | NR | No recent samples | No recent samples | No recent samples | No recent samples | 1 ft | Not recorded |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
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Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Wisconsin
See how Door County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.