Lake Omaha
Fulton County, Arkansas139 acresView mapDirections
Arkansas DEQ publishes the water-quality measurements for Lake Omaha. Here is what has been measured.
- 33 ft max depth
- Limited data
Lake Omaha in Fulton County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 1.7 µg/L. Surface area: 139 acres.
Lake Omaha is a 139-acre lake in Fulton County, Arkansas with an estimated average depth of about 33 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2016-04-12. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Omaha is safe to swim in today is a call for the Arkansas Division of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Omaha
These are the measurements Arkansas DEQ publishes for Lake Omaha, 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 20 µg/L. Chlorophyll-a 1.7 µg/L. TSI 42.
| 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 | 20µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 1.7µg/L | Measured, not scored 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. | 42 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Omaha
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~33 ft est.
Surface area
139 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Arkansas has not published bathymetry for Lake Omaha.
Lake Size & Watershed
Watershed (drainage) area
4 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.9 mi
HydroLAKES / HydroSHEDS
Elevation
518 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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Stays near Lake Omaha
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Fishing Lake Omaha
Water Quality Trend: Improving
Based on 4 years of monitoring (2012–2015).
Phosphorus
Stable0 µg/L/yr4 years
Chlorophyll-a
Improving-0.17 µg/L/yr4 years
Reservoir Info (USACE NID)
Lake Omaha is a man-made reservoir impounded by the Lake Omaha (completed 1969), built primarily for recreation on the Hubble Creek; earth-type dam, 53 ft tall and 1,200 ft long.
- Surface area
- 139 ac
- Normal storage
- 2,780 ac-ft
- Max storage
- 2,780 ac-ft
- Drainage area
- 4.4 sq mi
- Hazard class
- Significant
- Owner
- Cherokee Village SID
Source: USACE National Inventory of Dams, NID ID AR00245 · Operator website
Nearby Lakes in Fulton County
Frequently asked questions about Lake Omaha
Where is Lake Omaha?
- Lake Omaha is a lake in Fulton County, Arkansas. Its water-quality measurements are published by Arkansas DEQ and shown on this page as reported.
What is the water quality of Lake Omaha?
- Lake Omaha in Fulton County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 1.7 µg/L. Surface area: 139 acres.
Is Lake Omaha safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Omaha?
- No published bathymetric survey covers Lake Omaha, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 33 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 139 acres.
Explore Lake Omaha across LakeQuality
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Where this data comes from
40 measurements from 1 monitoring station, 2012–2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Arkansas Department of Environmental Quality
ARDEQH2O_WQX40 samples · 2012–2016
Analytical methods
- 4500 P J ~ Persulfate Method for Simultaneous Determination of Total Nitrogen and Total Phosphorus
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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)