Outagamie County Lake Quality
Wisconsin, 1 lake, average grade A (Excellent)
Outagamie County has 1 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters. The county's average grade is A — among the cleanest in Wisconsin. 1 lakes pull an A on their own, and almost none fall into the D or F brackets.
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. Oneida Lake (A) is the cleanest in the county.
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Quick Answers for Outagamie County
Planning a trip? Check special fishing regulations for Oneida Lake — or browse the full Wisconsin regulations index.
All Lakes in Outagamie County
1 lake1 graded lake
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | AOneida LakeOutagamie | A | No recent samples | 15 µg/L | 1.4 µg/L | No recent samples | Not recorded |
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 Outagamie 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.