Hill Lake
Oneida County, WisconsinLimited DataMesotrophic
Hill Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.
The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. A maximum depth of 40 ft puts Hill Lake in the middle of Wisconsin's depth distribution. The lake is compact at 33 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 134 graded lakes in Oneida County, Hill Lake sits at rank 48, above the county median.
No invasive species are currently listed at Hill Lake — the lake remains off the Wisconsin infested-waters roster. The fishery is bass-led, with 4 documented species across the lake's records. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-10-13. Grade methodology: LakeGrade methodology.
Watch Hill Lake water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Good clarity, visible to about 12 ft. Trophic State Index: 41.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 12 ft | B |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 41 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 40 ft |
| Surface Area | 33 acres |
| Public Access | Yes |
Fish Species
Click a species to see every graded lake where it is documented.
→ Best fishing times for Hill Lake (14-day solunar calendar)
→ Is it safe to eat fish from Hill Lake? (mercury & PFAS guide)
→ Hill Lake fishing regulations (limits, seasons, special rules)
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.185 m/yr | 6 |
Recreation & Access
Location
County Ranking
Ranked #48 of 134 lakes in Oneida County
Cleaner Lakes Within 30 Miles
Hill Lake holds Grade B. 3 nearby lakes hold higher grades.
Nearby Lakes in Oneida County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2017. 2 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
EPA Impairment Status
Hill Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit WI10007322 · Official waterbody report · Matched by proximity (2.52 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Fish and recreation data from Wisconsin DNR Lakes
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2025-10-13
Monitoring stations: 1
Where to stay near Hill Lake
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