Mirror Lake
Mirror Lake in Florence County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.5 ft visibility. Maximum depth: 13 ft. Surface area: 9 acres.
- Clarity
- 8.5 ft
- Max depth
- 13 ft
- Area
- 9 acres
- Trend
- ↑ Improving
- Public access
- Yes
Next lake in Florence County
Why Mirror Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Mirror Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
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.
Mirror Lake is a 9-acre lake in Florence County, Wisconsin with a maximum depth of 13 feet. Overall water quality is improving over recent sampling years. The lake supports 2 documented fish species including Panfish and Largemouth Bass. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-07-04. Grade methodology: LakeGrade methodology.
Watch Mirror Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Mirror Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 8.5 ft. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Mirror Lake
Compare lakeside cabins, hotels, and vacation rentals near Mirror 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 Mirror Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 13 ft |
| Surface Area | 9 acres |
| Public Access | Yes |
Recreation & Access
- Mirror LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Mirror Lake
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2023).
Fish Species (DNR-rated)
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.289 m/yr | 4 |
Graded lakes near Mirror Lake
Mirror Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Florence County
Frequently asked questions about Mirror Lake
What is the water quality grade for Mirror Lake?
- Mirror Lake in Florence County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.5 ft visibility. Maximum depth: 13 ft. Surface area: 9 acres.
Is Mirror Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mirror Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Mirror Lake?
- Mirror Lake has a maximum depth of 13 feet. The lake covers 9 acres.
What fish are in Mirror Lake?
- Fish species found in Mirror Lake include Panfish, Largemouth Bass. Mirror Lake is located in Florence County, Wisconsin.
Are there boat ramps on Mirror Lake?
- Mirror Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Mirror Lake. Public access is listed as yes.
Explore Mirror Lake across LakeGrade
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Florence County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
Other Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
5 measurements from 1 monitoring station, 2021–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX5 samples · 2021–2023
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