Ponca Lake B
Kay County, OklahomaView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Ponca Lake B in Kay County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 666.5 µg/L.
- Phosphorus
- 666.5 µg/L
- Trend
- ↑ Improving
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Watch Ponca Lake B’s letter
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Why Ponca Lake B has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Ponca Lake B, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by ODEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Ponca Lake B is a lake in Kay County, Oklahoma. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2012-06-20. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Ponca Lake B
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 666.5 µg/L. TSI 98.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 666.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 98 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Fishing Ponca Lake B
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.8 m/yr | 2 |
Graded lakes near Ponca Lake B
Ponca Lake B has no grade, but these lakes within a short drive do.
Nearby Lakes in Kay County
Frequently asked questions about Ponca Lake B
Where is Ponca Lake B?
- Ponca Lake B is a lake in Kay County, Oklahoma. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Ponca Lake B?
- Ponca Lake B in Kay County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 666.5 µg/L.
Is Ponca Lake B safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Ponca Lake B across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2012. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kaw Nation, Oklahoma (Tribal)
KAWNATON_WQX4 samples · 2012
Analytical methods
- Phosphorus, Total Ascorbic Acid Method
- Phosphorus, Recative (Orthophosphate) Ascorbic Acid Method
Monitoring station identifiers (1)
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.