Reisner Lake
Reisner Lake in Florence County, Wisconsin has a water quality grade of B (Good). Water clarity: 6.5 ft visibility. Phosphorus: 18.1 µg/L. Surface area: 96 acres.
- Clarity
- 6.5 ft
- Typical in August
- 68°F
- Area
- 96 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
Next lake in Florence County
Reisner Lake is a 96-acre mesotrophic lake in Florence County, Wisconsin. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is improving over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Compared to the 11 other monitored lakes in Florence County, Reisner Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 6.5 ft. Phosphorus level: 18.1 µg/L. Trophic State Index: 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.5 ft | Not graded |
| Phosphorus | 18.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Reisner Lake
Compare lakeside cabins, hotels, and vacation rentals near Reisner Lake in Florence County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Reisner Lake
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Water Temperature
Reisner Lake typically sits around 68°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 80°F) and coldest in Oct (about 56°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 36 field readings (2024–2025) via the EPA Water Quality Portal. See the full Reisner Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 96 acres |
The available depth estimate for Reisner Lake is shallower than its measured water clarity, which cannot be right, so no depth is shown.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Reisner Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 2020. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.58 m/yr | 7 |
| Phosphorus | → Stable | 0 µg/L/yr | 3 |
County Ranking
Ranked #4 of 12 lakes in Florence County
Nearby Lakes in Florence County
Frequently asked questions about Reisner Lake
What is the water quality grade for Reisner Lake?
- Reisner Lake in Florence County, Wisconsin has a water quality grade of B (Good). Water clarity: 6.5 ft visibility. Phosphorus: 18.1 µg/L. Surface area: 96 acres.
Is Reisner Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Reisner Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Reisner Lake?
- Reisner Lake typically sits around 68°F at the surface in August, from 36 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Reisner Lake?
- The available depth estimate for Reisner Lake is shallower than its measured water clarity, which cannot be right, so no depth is shown. The lake covers 96 acres.
What fish are in Reisner Lake?
- Fish species found in Reisner Lake include Panfish, Largemouth Bass, Northern Pike. Reisner Lake is located in Florence County, Wisconsin.
Explore Reisner Lake across LakeGrade
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Species activity outlook by water temperature and season
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Moderate nutrients, good water quality
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Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
79 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX79 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes