Where is Isham Reservoir?

Isham Reservoir is a lake in Sheridan County, Nebraska. Its water-quality measurements are published by Nebraska DEE and shown on this page as reported.

Isham Reservoir

Sheridan County, Nebraska42 acresView map Directions

No nutrient or algae sampling on record from Nebraska DEE for this lake.

Area

42 acres

Surface area

Shoreline

2.8 mi

Measured length

Impaired · Mercury

See the measurements Directions Where to stay

Isham Reservoir in Sheridan County, Nebraska has water-quality measurements published by Nebraska DEE, shown here as reported. Surface area: 42 acres.

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Isham Reservoir is a 42-acre lake in Sheridan County, Nebraska.

Source: EPA Water Quality Portal sampling records, NDEE. Methodology: how these readings are compared.

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Isham Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.

Whether Isham Reservoir is safe to swim in today is a call for the Nebraska Department of Environment and Energy and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Isham Reservoir

These are the measurements Nebraska DEE publishes for Isham 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. TSI undefined.

Ask about Isham Reservoir

Answers come straight from the public measurements and survey records on this page.

Lake Details

Surface area

42 acres

Shoreline

2.8 mi

No bathymetric survey has been published for Isham Reservoir, so its depth is not documented here.

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Stays near Isham Reservoir

Compare lakeside cabins, hotels, and vacation rentals near Isham Reservoir in Sheridan County, Nebraska — 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.

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Fishing Isham Reservoir

→ Isham Reservoir fishing regulations (limits, seasons, special rules)

EPA Impairment Status

Isham Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

MercurypH / acidity

Designated uses not supporting: Aquatic life.

Source: EPA ATTAINS assessment unit NE-WH1-L0010 · Official waterbody report

Nearby Lakes in Sheridan County

Walgren Lake20.6 miView →Smith Lake1.7 ft clear · Hypereutrophic—View →Spring Lake—View →Cravath Lake—View →Frye Lake—View →Rush Lake—View →

Frequently asked questions about Isham Reservoir

Where is Isham Reservoir?: Isham Reservoir is a lake in Sheridan County, Nebraska. Its water-quality measurements are published by Nebraska DEE and shown on this page as reported.
What is the water quality of Isham Reservoir?: Isham Reservoir in Sheridan County, Nebraska has water-quality measurements published by Nebraska DEE, shown here as reported. Surface area: 42 acres.
Is Isham Reservoir safe to swim in?: Nutrient and algae readings are not a swimming clearance. Isham Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pH / acidity. Check local advisories before you swim.