Hauani Lake
Marshall County, Oklahoma270 acresView mapDirections
Oklahoma DEQ publishes the water-quality measurements for Hauani Lake. Here is what has been measured.
- 31 ft max depth
- Limited data
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Answers come straight from the public measurements and survey records on this page.
Hauani Lake in Marshall County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 7 ft visibility. Surface area: 270 acres.
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Hauani Lake is a 270-acre lake in Marshall County, Oklahoma with an estimated average depth of about 31 feet.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2019-08-06. Grade methodology: LakeQuality methodology.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Hauani 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.
Water quality measurements for Hauani Lake
These are the measurements Oklahoma DEQ publishes for Hauani Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7 ft. TSI 49.
| Metric | Value | EPA condition class |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Measured, not scored |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~31 ft est. |
| Average Depth | ~16 ft est. |
| Surface Area | 270 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Oklahoma has not published bathymetry for Hauani Lake.
Lake Size & Watershed
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.
Fishing Hauani Lake
Reservoir Info (USACE NID)
Hauani Lake is a man-made reservoir impounded by the Madill Reservoir (completed 1980), built primarily for water supply on the Hauani Creek; earth-type dam, 59 ft tall and 1,650 ft long.
- Surface area
- 270 ac
- Normal storage
- 3,000 ac-ft
- Max storage
- 3,500 ac-ft
- Drainage area
- 11.72 sq mi
- Hazard class
- Low
- Owner
- CITY OF MADILL
Source: USACE National Inventory of Dams, NID ID OK21544 · Operator website
Nearby Lakes in Marshall County
Frequently asked questions about Hauani Lake
Where is Hauani Lake?
- Hauani Lake is a lake in Marshall County, Oklahoma. Its water-quality measurements are published by Oklahoma DEQ and shown on this page as reported.
What is the water quality of Hauani Lake?
- Hauani Lake in Marshall County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 7 ft visibility. Surface area: 270 acres.
Is Hauani Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Hauani Lake?
- No published bathymetric survey covers Hauani Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 31 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 270 acres.
Explore Hauani Lake across LakeQuality
Planning a trip around Chickasaw?
Hauani Lake is about 28 miles from Chickasaw National Recreation Area. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Chickasaw →More lakes in Oklahoma
Other Lakes in Oklahoma
Mesotrophic Lakes in Oklahoma
Where this data comes from
8 measurements from 3 monitoring stations, 2018–2019. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- OWRB Lakes Monitoring
OKWRB-LAKES_WQX8 samples · 2018–2019
Analytical methods
- OWRB Lakes Field Data Collection
Monitoring station identifiers (3)
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)