Keystone Lake
Pawnee County, OklahomaView mapDirections
Oklahoma DEQ publishes the water-quality measurements for Keystone Lake. Here is what has been measured.
- Public access
- Limited data
Keystone Lake in Pawnee County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 1.9 ft visibility.
Keystone Lake is a lake in Pawnee County, Oklahoma. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 4 public boat landings.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2024-10-21. Methodology: how these readings are compared.
What Keystone Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch4 documented ramps
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Keystone 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 Keystone Lake
These are the measurements Oklahoma DEQ publishes for Keystone 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 1.9 ft of visibility. TSI 68.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.9ft | 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. | 68 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Keystone Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Walnut Creek ParkPublic
- Akdar ShrinePublic
- Osage Point ParkPublic
- Cimarron RiverPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Keystone Lake
Compare lakeside cabins, hotels, and vacation rentals near Keystone Lake in Pawnee County, Oklahoma — 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 Keystone Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2017–2024).
Water clarity
Improving4 years
Nearby Lakes in Pawnee County
Frequently asked questions about Keystone Lake
Where is Keystone Lake?
- Keystone Lake is a lake in Pawnee County, Oklahoma. Its water-quality measurements are published by Oklahoma DEQ and shown on this page as reported.
What is the water quality of Keystone Lake?
- Keystone Lake in Pawnee County, Oklahoma has water-quality measurements published by Oklahoma DEQ, shown here as reported. Water clarity: 1.9 ft visibility.
Is Keystone Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Keystone Lake?
- Keystone Lake has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Walnut Creek Park, Akdar Shrine, Osage Point Park, Cimarron River. Public access is listed as yes.
Can I fish at Keystone Lake?
- Keystone Lake has 4 documented boat landings 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.
Explore Keystone Lake across LakeQuality
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Eutrophic Lakes in Oklahoma
Where this data comes from
175 measurements from 12 monitoring stations, 2016–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- OWRB Lakes Monitoring
OKWRB-LAKES_WQX175 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 (12)
- OKWRB-LAKES_WQX-621200010050-03
- OKWRB-LAKES_WQX-621200010020-02
- OKWRB-LAKES_WQX-620900010090-10
- OKWRB-LAKES_WQX-620900010020-09
- OKWRB-LAKES_WQX-620900010090-11
- OKWRB-LAKES_WQX-620900010020-06
- OKWRB-LAKES_WQX-620900010020-08
- OKWRB-LAKES_WQX-620900010020-07
- OKWRB-LAKES_WQX-621200010050-04
- OKWRB-LAKES_WQX-620900010090-12
- OKWRB-LAKES_WQX-621200010020-01
- OKWRB-LAKES_WQX-621200010050-05
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
Named boat-access points from the USGS National Boat Ramps inventory