B
Hartlaub Lake -
Manitowoc County, Wisconsin
Water Quality Grade: B — Good
Crystal clear — you can see 16.4 feet down. Phosphorus level: 35.8 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 m | A |
| Phosphorus | 35.8 µg/L | C |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #21 of 28 lakes in Manitowoc County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-11
Monitoring stations: 1