Selected measurement
Measured 2026Clarity
2026 · 17.4 feet Secchi depth
- Measurement date
- August 9, 2026
- Source
- Wisconsin DNR
This reading shows how far light penetrated the water at one monitored place and time.
Public lake record · Wisconsin
Elkhart Lake Water Quality — Wisconsin
What's known about this lake, when it was last measured, and what's missing.
- Surface area
- 292 acres
- Maximum depth
- 119 feet
- County
- Sheboygan
- Nearest town
- Elkhart Lake, WI
- Lake type
- Natural glacial lake, spring-fed
- Location
- 43.83° N, 88.02° W
Data freshness, not a lake grade
Lake Snapshot
Select a segment to see the latest public measurement. Status describes when data was collected—not whether the lake is healthy.
MeasuredOutdatedNo data
| Parameter | Status | Record age | Latest value | Date | Source |
|---|---|---|---|---|---|
| Clarity | Measured 2026 | current | 2026 · 17.4 feet Secchi depth | August 9, 2026 | Wisconsin DNR |
| Nutrients | Outdated · 2009 | outdated — 17 yrs | 2009 · 11 µg/L total phosphorusThis is the most recent public measurement on record. It is 17 years old and does not describe conditions today. | July 16, 2009 | EPA Water Quality Portal |
| Algae & Blooms | Outdated · 2011 | historical record only | 2011 · 5.2 µg/L chlorophyll-aThis is the most recent public measurement on record. It is 15 years old and does not describe conditions today. | August 3, 2011 | Wisconsin DNR |
| Oxygen | Outdated · 2019 | outdated — 7 yrs | 2019 · 7.1 mg/L dissolved oxygen at 10 meters | July 22, 2019 | Wisconsin DNR |
| Bacteria | No data | no record | No measurement on record | Not available | Wisconsin DNR public records (no record found) |
| Invasive Species | No data | no record | No recent survey on record | Not available | Wisconsin DNR surface water data (no recent record found) |
Read more about Clarity & nutrients, Blooms & swimming safety, and Invasive species to understand what these measurements mean.
What the data says
Is it safe to swim in Elkhart Lake?
Public data can describe when this lake was last measured, and little more. Clarity was measured at 17.4 feet on August 9, 2026 at one monitored location, which is not a swimming-safety measurement.
No recent public algae data. The most recent record on file is from 2011 and cannot describe current conditions.
No public bacteria measurement is on record, so public data cannot describe current conditions.
Public advisories: No public advisory on record as of August 9, 2026.
Swimming safety usually depends on bacteria and bloom conditions measured close to the shoreline, and neither is available here on a current basis. Look for posted local notices before swimming. Blooms & swimming safety explains what bloom and bacteria results can and cannot tell you.
Known gaps
What we don't know about Elkhart Lake
- No public bacteria testing is on record for swimming areas.
- No recent aquatic invasive species survey is on record.
- The most recent algae reading is from 2011 and the only phosphorus reading is from 2009.
- The latest dissolved oxygen profile is from July 22, 2019 and is outdated.
Most lakes are measured rarely, if at all. Monitoring closes the gaps.
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For lake associations
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Learn more
Plain-English guides for your next question.
Blooms & swimming safety
Understand what bloom and bacteria results can—and cannot—tell you.
Blooms & swimming safetyClarity & nutrients
Learn how clarity, phosphorus, nitrogen, and algae relate over time.
Clarity & nutrientsRunning a monitoring program
Build a repeatable record your association can carry forward.
Running a monitoring programInvasive species
Learn how invasive plants and animals are detected and tracked.
Invasive speciesBack to Wisconsin lake records or the full lake directory.
Lake Pulse is independent. We don't sell treatments and have no stake in what the data shows. We never share a lake's private data — everything on this page comes from publicly available sources.