Lost Lake
Marshall County, IndianaView mapDirections
IDEM publishes the water-quality measurements for Lost Lake. Here is what has been measured.
- 26 ft max depth
- Public access
- Limited data
Lost Lake in Marshall County, Indiana has water-quality measurements published by IDEM, shown here as reported. Water clarity: 4.9 ft visibility.
Lost Lake is a lake in Marshall County, Indiana with an estimated average depth of about 26 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2022-07-10. Methodology: how these readings are compared.
What Lost Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Lost Lake Water Quality Summary (2026)
A printable one-page summary for Lost Lake: clarity, phosphorus, algae, multi-year trend, depth, and fish — with sources.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lost Lake is safe to swim in today is a call for the Indiana Department of Environmental Management and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lost Lake
These are the measurements IDEM publishes for Lost Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.9 ft. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lost Lake
Answers come straight from the public measurements and survey records on this page.
Current Conditions
USGS snapshot Jul 6, 2026, 4:00 AM from gauge 03331440 (Lake Maxinkuckee at Culver, IN). Station page ↗ — a live reading replaces this snapshot when the gauge responds. Missing live data is not an all-clear.
Lake Details
Max depth
~26 ft est.
Public access
Yes
Listed by IDEM
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Indiana has not published bathymetry for Lost Lake.
Lake Size & Watershed
Watershed (drainage) area
14 sq mi
HydroLAKES / HydroSHEDS
Surface area
42 acres
HydroLAKES / HydroSHEDS
Shoreline
1.1 mi
HydroLAKES / HydroSHEDS
Elevation
735 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Tri-County Fish & Wildlife AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Lost Lake
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Follow Lost Lake’s readings
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Fishing Lost Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Worsening+5.5 µg/L/yr5 years
Chlorophyll-a
Worsening+0.1 µg/L/yr5 years
Regulated Pollution Sources Nearby
15 EPA-permitted facilities operate within about 5 miles of Lost Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Culver Wastewater Treatment PlantCulver · 0.4 mi away · NPDES IN0021288Recent violation
- Culver Community School Bus GaCulver · 1 mi away · NPDES IN0053767
- Chippers Pond DredgingCulver · 1.3 mi away · NPDES INR10L164
- Culver Lake Max Trail Phase IiCulver · 1.3 mi away · NPDES INRA07101
- East Lakeshore Drive Drainage ImprovementsCulver · 1.7 mi away · NPDES INR10L065
- Hart LodgeCulver · 1.7 mi away · NPDES INR10K932
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Marshall County
Frequently asked questions about Lost Lake
Where is Lost Lake?
- Lost Lake is a lake in Marshall County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of Lost Lake?
- Lost Lake in Marshall County, Indiana has water-quality measurements published by IDEM, shown here as reported. Water clarity: 4.9 ft visibility.
Is Lost Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lost Lake?
- No published bathymetric survey covers Lost Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 26 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
What is the water level at Lost Lake?
- The USGS snapshot on this page for Lost Lake is 3.66 ft of gage height, recorded Jul 6, 2026, 4:00 AM at gauge 03331440. Current Conditions hydrates a live NWIS reading from that same station when the gauge responds. A missed live fetch is not an all-clear.
Are there boat ramps on Lost Lake?
- Lost Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Tri-County Fish & Wildlife Area. Public access is listed as yes.
Can I fish at Lost Lake?
- Lost Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Indiana's fish and wildlife agency, so check its current regulations before you go.
Explore Lost Lake across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS3 samples · 2020–2022
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory