Long Lake
Price County, WisconsinLimited DataEutrophic
On the LakeGrade rubric Long Lake fails the cutoffs — a TSI of 63 and persistent algal pressure put it in the bottom tier. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.
Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. At 54 ft of maximum depth, Long Lake stratifies reliably through the summer — the hypolimnion stays cooler and clearer than the surface layer suggests. At 419 acres, Long Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Within the 27 graded lakes of Price County, Long Lake sits at rank 23, near the bottom of the county list.
Long Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. Walleye are documented at Long Lake, one of 6 fish species on record for the lake. 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 2020-02-11. Grade methodology: LakeGrade methodology.
Watch Long Lake water quality
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2.7 ft of visibility. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.7 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 54 ft |
| Surface Area | 419 acres |
Fish Species
Click a species to see every graded lake where it is documented.
→ Best fishing times for Long Lake (14-day solunar calendar)
→ Is it safe to eat fish from Long Lake? (mercury & PFAS guide)
→ Long Lake fishing regulations (limits, seasons, special rules)
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.065 m/yr | 3 |
Location
County Ranking
Ranked #23 of 27 lakes in Price County
Cleaner Lakes Within 30 Miles
Long Lake holds Grade F. 5 nearby lakes hold higher grades.
- BLake Ten-Deep HolePrice County · mi · Two grade letters higher (F → B)
- CBig Dardis LakePrice County · mi · Two grade letters higher (F → C)
- DWilson Flowage LakePrice County · mi · Higher grade (F → D)
- DSolberg LakePrice County · mi · Higher grade (F → D)
- DLac Sault Dore LakePrice County · mi · Higher grade (F → D)
Nearby Lakes in Price County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 2 stations on file (most recent sample 2020).
Fish Species (DNR-rated)
Reservoir Info (USACE NID)
Long Lake is a man-made reservoir impounded by the Jobes (completed 1934), built primarily for recreation on the ELK; gravity-type dam, 16 ft tall and 285 ft long.
- Surface area
- 1,237 ac
- Normal storage
- 6,200 ac-ft
- Max storage
- 8,000 ac-ft
- Drainage area
- 216 sq mi
- Hazard class
- High
- Owner
- Price County
Source: USACE National Inventory of Dams, NID ID WI00179 · Operator website · Matched by proximity (0.49 km)
EPA Impairment Status
Long Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit WI10003538 · Official waterbody report · Matched by proximity (1.78 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
Most recent sample: 2020-02-11
Monitoring stations: 1
Where to stay near Long Lake
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