Third Black Lake
Third Black Lake in Iron County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 64 acres.
- Area
- 64 acres
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Why Third Black 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 Third Black Lake, no water-quality sampling on record for this lake.
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.
Third Black Lake is a 64-acre lake in Iron County, Wisconsin.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Third Black Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Third Black Lake
Compare lakeside cabins, hotels, and vacation rentals near Third Black Lake 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.
Top-rated places to stay near Third Black Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 64 acres |
No bathymetric survey has been published for Third Black Lake, so its depth is not documented here.
Fishing Third Black Lake
Nearby Lakes in Iron County
Frequently asked questions about Third Black Lake
Where is Third Black Lake?
- Third Black Lake is a lake in Iron County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Third Black Lake?
- Third Black Lake in Iron County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 64 acres.
Is Third Black Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Third Black Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Third Black Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.