Somerset Reservoir
Perry County, OhioView mapDirections
Ohio EPA publishes the water-quality measurements for Somerset Reservoir. Here is what has been measured.
- Hypereutrophic
- Limited data
Somerset Reservoir in Perry County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Phosphorus: 41.7 µg/L. Chlorophyll-a (algae): 63.5 µg/L.
Somerset Reservoir is a highly nutrient-loaded hypereutrophic lake in Perry County, Ohio. Compared to the 2 other monitored lakes in Perry County, Somerset Reservoir ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Ohio EPA, last sampled 2022-10-17. 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 Somerset 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 Somerset Reservoir
These are the measurements Ohio EPA publishes for Somerset 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 41.7 µg/L. Chlorophyll-a 63.5 µg/L. TSI 65.
| 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 | 41.7µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 63.5µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 65 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Somerset Reservoir
Answers come straight from the public measurements and survey records on this page.
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Stays near Somerset Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Somerset Reservoir in Perry 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 Somerset Reservoir are listed below.
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Fishing Somerset Reservoir
Nearby Lakes in Perry County
Frequently asked questions about Somerset Reservoir
Where is Somerset Reservoir?
- Somerset Reservoir is a lake in Perry County, Ohio. Its water-quality measurements are published by Ohio EPA and shown on this page as reported.
What is the water quality of Somerset Reservoir?
- Somerset Reservoir in Perry County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Phosphorus: 41.7 µg/L. Chlorophyll-a (algae): 63.5 µg/L.
Is Somerset Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Somerset Reservoir across LakeQuality
More lakes in Ohio
Other Lakes in Ohio
Hypereutrophic Lakes in Ohio
Where this data comes from
29 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_WQX29 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.