Upper Sandusky Reservoir
Wyandot County, OhioView mapDirections
Ohio EPA publishes the water-quality measurements for Upper Sandusky Reservoir. Here is what has been measured.
- Eutrophic
- Limited data
Ask about Upper Sandusky Reservoir
Answers come straight from the public measurements and survey records on this page.
Upper Sandusky Reservoir in Wyandot County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Phosphorus: 56.5 µg/L. Chlorophyll-a (algae): 29.4 µg/L.
Stays via Stay22
Stays near Upper Sandusky Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Upper Sandusky Reservoir in Wyandot County, Ohio — 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Upper Sandusky Reservoir are listed below.
Top-rated places to stay near Upper Sandusky Reservoir
Prices for Sep 18–20, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Ohio’s top lakes →
Follow Upper Sandusky Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Upper Sandusky Reservoir is a productive, nutrient-rich eutrophic lake in Wyandot County, Ohio.
Source: EPA Water Quality Portal sampling records, Ohio EPA, last sampled 2022-09-27. Grade methodology: LakeQuality methodology.
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 Upper Sandusky 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 Upper Sandusky Reservoir
These are the measurements Ohio EPA publishes for Upper Sandusky 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 56.5 µg/L. Chlorophyll-a 29.4 µg/L. TSI 63.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 56.5 µg/L | Fair |
| Chlorophyll-a (Algae) | 29.4 µg/L | Poor |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Upper Sandusky Reservoir
Nearby Lakes in Wyandot County
Frequently asked questions about Upper Sandusky Reservoir
Where is Upper Sandusky Reservoir?
- Upper Sandusky Reservoir is a lake in Wyandot County, Ohio. Its water-quality measurements are published by Ohio EPA and shown on this page as reported.
What is the water quality of Upper Sandusky Reservoir?
- Upper Sandusky Reservoir in Wyandot County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Phosphorus: 56.5 µg/L. Chlorophyll-a (algae): 29.4 µg/L.
Is Upper Sandusky Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Upper Sandusky Reservoir across LakeQuality
More lakes in Ohio
Other Lakes in Ohio
Eutrophic Lakes in Ohio
Where this data comes from
31 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Division of Surface water (Ohio)
21OHIO_WQX31 samples · 2022
Analytical methods
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
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.