Lake Dorothy
Lake Dorothy in Iron County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.9 ft visibility. Phosphorus: 16.9 µg/L. Maximum depth: 26 ft. Surface area: 21 acres.
- Clarity
- 7.9 ft
- Max depth
- 26 ft
- Area
- 21 acres
Next lake in Iron County
Why Lake Dorothy 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 Lake Dorothy, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not 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.
Lake Dorothy is a 21-acre lake in Iron County, Wisconsin with a maximum depth of 26 feet. The lake supports 3 documented fish species including Musky, Panfish, and Largemouth Bass.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-08-31. Grade methodology: LakeGrade methodology.
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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 Lake Dorothy
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Moderate clarity, visible to about 7.9 ft. Phosphorus level: 16.9 µg/L. Trophic State Index: 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.9 ft | Not graded |
| Phosphorus | 16.9 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Dorothy
Compare lakeside cabins, hotels, and vacation rentals near Lake Dorothy in Iron 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 26 ft |
| Surface Area | 21 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake Dorothy
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2022).
Fish Species (DNR-rated)
Graded lakes near Lake Dorothy
Lake Dorothy has no grade, but these lakes within a short drive do.
Nearby Lakes in Iron County
Frequently asked questions about Lake Dorothy
What is the water quality grade for Lake Dorothy?
- Lake Dorothy in Iron County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.9 ft visibility. Phosphorus: 16.9 µg/L. Maximum depth: 26 ft. Surface area: 21 acres.
Is Lake Dorothy safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Dorothy 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 Lake Dorothy?
- Lake Dorothy has a maximum depth of 26 feet. The lake covers 21 acres.
What fish are in Lake Dorothy?
- Fish species found in Lake Dorothy include Musky, Panfish, Largemouth Bass. Lake Dorothy is located in Iron County, Wisconsin.
Explore Lake Dorothy across LakeGrade
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Species activity outlook by water temperature and season
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Where this data comes from
3 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX3 samples · 2022
Analytical methods
- Phosphorus by Colorimetry
- Turbidity in Water
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