Humphreys Lake
Stephens County, Oklahoma882 acresView mapDirections
Oklahoma DEQ publishes the water-quality measurements for Humphreys Lake. Here is what has been measured.
- 58 ft max depth
- Public access
- Limited data
Humphreys Lake in Stephens County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 2 ft visibility. Surface area: 882 acres.
Humphreys Lake is a 882-acre lake in Stephens County, Oklahoma with an estimated average depth of about 58 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2023-10-17. Methodology: how these readings are compared.
What Humphreys Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Humphreys 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 Humphreys Lake
These are the measurements Oklahoma DEQ publishes for Humphreys 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 ft of visibility. TSI 67.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading 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. | 67 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Humphreys Lake
Answers come straight from the public measurements and survey records on this page.
→ Humphreys Lake water level: the live USGS gauge reading
Lake Details
Max depth
~58 ft est.
Surface area
882 acres
Public access
Yes
Listed by Oklahoma DEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Oklahoma has not published bathymetry for Humphreys Lake.
Lake Size & Watershed
Watershed (drainage) area
32 sq mi
HydroLAKES / HydroSHEDS
Shoreline
6.8 mi
HydroLAKES / HydroSHEDS
Elevation
1,184 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.
Recreation & Access
- Lake HumphreysPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Humphreys Lake
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Fishing Humphreys Lake
Water quality readings over time
3 seasons of samples on record (2017–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening3 years
Reservoir Info (USACE NID)
Humphreys Lake is a man-made reservoir impounded by the SCS-Wildhorse Creek Site-022 (completed 1958), built primarily for flood risk reduction on the Wildhorse Creek; earth-type dam, 54 ft tall and 4,150 ft long.
- Surface area
- 882 ac
- Normal storage
- 14,041 ac-ft
- Max storage
- 25,962 ac-ft
- Hazard class
- Low
- Owner
- STEPHENS CO CONS DIST
Source: USACE National Inventory of Dams, NID ID OK01192 · Operator website
Nearby Lakes in Stephens County
Frequently asked questions about Humphreys Lake
Where is Humphreys Lake?
- Humphreys Lake is a lake in Stephens County, Oklahoma. Its water-quality measurements are published by Oklahoma DEQ and shown on this page as reported.
What is the water quality of Humphreys Lake?
- Humphreys Lake in Stephens County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 2 ft visibility. Surface area: 882 acres.
Is Humphreys Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Humphreys Lake?
- No published bathymetric survey covers Humphreys Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 58 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 882 acres.
Are there boat ramps on Humphreys Lake?
- Humphreys Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Humphreys. Public access is listed as yes.
Can I fish at Humphreys Lake?
- Humphreys Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Oklahoma's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
36 measurements from 3 monitoring stations, 2016–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- OWRB Lakes Monitoring
OKWRB-LAKES_WQX36 samples · 2016–2023
Analytical methods
- OWRB Lakes Field Data Collection
- Determination of Turbidity
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)
Named boat-access points from the USGS National Boat Ramps inventory