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Eufaula Lake

Pittsburg County, OklahomaView mapDirections

Oklahoma DEQ publishes the water-quality measurements for Eufaula Lake. Here is what has been measured.

Clarity
2.4 ft
Secchi · sampled 2024
  • Impaired · Mercury
  • Limited data
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Answers come straight from the public measurements and survey records on this page.

Eufaula Lake in Pittsburg County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 2.4 ft visibility.

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Eufaula Lake is a lake in Pittsburg County, Oklahoma.

Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2024-11-05. Grade methodology: LakeQuality methodology.

Swimming conditions

No reading

Limited data

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

Whether Eufaula Lake is safe to swim in today is a call for the Oklahoma Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Eufaula Lake

These are the measurements Oklahoma DEQ publishes for Eufaula Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Very murky, less than 2.4 ft of visibility. TSI 64.

MetricValueEPA condition class
Water Clarity (Secchi Depth)2.4 ftMeasured, not scored
PhosphorusNo recent samples
Chlorophyll-a (Algae)No recent samples
Trophic State Index (TSI)64Eutrophic

High nutrients, frequent algae, reduced clarity

Fishing Eufaula Lake

EPA Impairment Status

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

Causes of impairment

Mercury

Source: EPA ATTAINS assessment unit OK220600010020_00 · Official waterbody report

Nearby Lakes in Pittsburg County

Crowder Reservoir—View →Krebs Lake—View →Fin and Feather Lake—View →Eufaula Lake3 ft clear18.9 miView →Talawanda Lake5.1 ft clear18.6 miView →Lake Mcalester0.6 ft clear17.9 miView →

Frequently asked questions about Eufaula Lake

Where is Eufaula Lake?

Eufaula Lake is a lake in Pittsburg County, Oklahoma. Its water-quality measurements are published by Oklahoma DEQ and shown on this page as reported.

What is the water quality of Eufaula Lake?

Eufaula Lake in Pittsburg County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 2.4 ft visibility.

Is Eufaula Lake safe to swim in?

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

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Where this data comes from

233 measurements from 14 monitoring stations, 2016–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

  • OWRB Lakes MonitoringOKWRB-LAKES_WQX233 samples · 2016–2024

Analytical methods

  • OWRB Lakes Field Data Collection
  • Phosphorus by Two Reagent Colorimetry
  • 10200 H ~ Chlorophyll a-b-c Determination
  • Determination of Turbidity
Monitoring station identifiers (14)

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

Impairment status from EPA ATTAINS 303(d) database