Joanis Lake
Joanis Lake in Portage County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 23 acres.
- Area
- 23 acres
- Public access
- Yes
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Why Joanis Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Joanis Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Joanis Lake is a 23-acre lake in Portage County, Wisconsin. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-04-14. Grade methodology: LakeQuality methodology.
Watch Joanis Lake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Joanis Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Where to stay near Joanis Lake
Compare lakeside cabins, hotels, and vacation rentals near Joanis Lake in Portage 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 Joanis Lake
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WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2025).
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 23 acres |
| Public Access | Yes |
No bathymetric survey has been published for Joanis Lake, so its depth is not documented here.
Recreation & Access
- Bukolt ParkPublic
- Pfiffner Pioneer ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Joanis 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.
Graded lakes near Joanis Lake
Joanis Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Portage County
Frequently asked questions about Joanis Lake
Where is Joanis Lake?
- Joanis Lake is a lake in Portage County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Joanis Lake?
- Joanis Lake in Portage County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 23 acres.
Is Joanis Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Joanis Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Joanis Lake?
- Joanis Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Bukolt Park, Pfiffner Pioneer Park. Public access is listed as yes.
Explore Joanis Lake across LakeQuality
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Where this data comes from
12 measurements from 1 monitoring station, 2023–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX12 samples · 2023–2026
Analytical methods
- Total Phosphorus After Block Digestion
- 2130 B ~ Nephelometric Method
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
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory