Lake Sardis Clayton
Pushmataha County, OklahomaView mapDirections
Nutrients and algae run above the regional average.
↑ up from F at the last regrade
- Hypereutrophic
- #2 of 2 in the county
- Public access
Lake Sardis Clayton in Pushmataha County, Oklahoma has a water quality grade of D (Nutrient-rich). Phosphorus: 260 µg/L.
- Type
- Hypereutrophic
- Phosphorus
- 260 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Stays near Lake Sardis Clayton
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Lake Sardis Clayton is a highly nutrient-loaded hypereutrophic lake in Pushmataha County, Oklahoma. Water quality is graded D based on 2 sampling years through 2026. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 1 other monitored lakes in Pushmataha County, Lake Sardis Clayton ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2026-03-25. Grade methodology: LakeQuality methodology.
What Lake Sardis Clayton is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
Swimming Safety
Grade onlyElevated nutrients
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus 260 µg/L. TSI 84. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 260 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 84 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Recreation & Access
- The NarrowsPublic
- Sardis CovePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Sardis Clayton
Water Quality Trend: ↓ Declining
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -16.167 m/yr | 2 |
| Phosphorus | ↓ Declining | +19.29 µg/L/yr | 6 |
County Ranking
Ranked #2 of 2 lakes in Pushmataha County
Nearby Lakes in Pushmataha County
Frequently asked questions about Lake Sardis Clayton
Where is Lake Sardis Clayton?
- Lake Sardis Clayton is a lake in Pushmataha County, Oklahoma. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Sardis Clayton?
- Lake Sardis Clayton in Pushmataha County, Oklahoma has a water quality grade of D (Nutrient-rich). Phosphorus: 260 µg/L.
Is Lake Sardis Clayton safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Lake Sardis Clayton?
- Lake Sardis Clayton has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include The Narrows, Sardis Cove. Public access is listed as yes.
Explore Lake Sardis Clayton across LakeQuality
Species activity outlook by water temperature and season
Where to stay at Oklahoma's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
Oklahoma's cleanest and most-polluted lakes, ranked
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Other Grade D Lakes in Oklahoma
Hypereutrophic Lakes in Oklahoma
Where this data comes from
1,585 measurements from 3 monitoring stations, 2019–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- The Choctaw Nation of Oklahoma (Tribal)
CHOCNATWQX1,585 samples · 2019–2026
Analytical methods
- Persulfate Digestion Method
- Total Phosphorus in Water
- Nitrogen, Kjeldahl - Simplified Spectrophotometric Measurement of Total Kjeldahl Nitrogen in Water and Wastewater
Monitoring station identifiers (3)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory