Lost Creek Reservoir
Allen County, OhioView mapDirections
Ohio EPA publishes the water-quality measurements for Lost Creek Reservoir. Here is what has been measured.
- Eutrophic
- 42 ft max depth
- Limited data
Lost Creek Reservoir in Allen County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Phosphorus: 26.5 µg/L.
Lost Creek Reservoir is a productive, nutrient-rich eutrophic lake in Allen County, Ohio with an estimated average depth of about 42 feet. Compared to the 6 other monitored lakes in Allen County, Lost Creek Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Ohio EPA, last sampled 2024-09-18. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lost Creek Reservoir is safe to swim in today is a call for the Ohio Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lost Creek Reservoir
These are the measurements Ohio EPA publishes for Lost Creek Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 26.5 µg/L. TSI 51.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 26.5µg/L | Good GoodFairPoor |
| 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. | 51 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lost Creek Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~42 ft est.
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Ohio has not published bathymetry for Lost Creek Reservoir.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Surface area
101 acres
HydroLAKES / HydroSHEDS
Shoreline
1.7 mi
HydroLAKES / HydroSHEDS
Elevation
876 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.
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Nearby Lakes in Allen County
Frequently asked questions about Lost Creek Reservoir
Where is Lost Creek Reservoir?
- Lost Creek Reservoir is a lake in Allen County, Ohio. Its water-quality measurements are published by Ohio EPA and shown on this page as reported.
What is the water quality of Lost Creek Reservoir?
- Lost Creek Reservoir in Allen County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Phosphorus: 26.5 µg/L.
Is Lost Creek Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lost Creek Reservoir?
- No published bathymetric survey covers Lost Creek Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 42 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
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Where this data comes from
5 measurements from 1 monitoring station, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Division of Surface water (Ohio)
21OHIO_WQX5 samples · 2024
Analytical methods
- Total Phosphorus After Block Digestion
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
Lake size & watershed from HydroLAKES (HydroSHEDS)