Ponca Lake A
Kay County, Oklahoma1,159 acresView 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.
- Public access
- Limited data
Ponca Lake A in Kay County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 237 µg/L. Chlorophyll-a (algae): 9.1 µg/L. Surface area: 1159 acres.
- Area
- 1,159 acres
- Phosphorus
- 237 µg/L
- Chlorophyll-a
- 9.1 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Ponca Lake A’s letter
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Why Ponca Lake A 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 A, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
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 A is a 1,159-acre lake in Kay County, Oklahoma. Overall water quality is improving 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 2015-12-11. Grade methodology: LakeQuality methodology.
What Ponca Lake A is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water1,159 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Ponca Lake A
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 237 µg/L. Chlorophyll-a 9.1 µg/L. TSI 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 237 µg/L | Not graded |
| Chlorophyll-a (Algae) | 9.1 µg/L | Not graded |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,159 acres |
| Public Access | Yes |
No bathymetric survey has been published for Ponca Lake A, so its depth is not documented here.
Recreation & Access
- Pageant AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Ponca Lake A
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +3.597 m/yr | 4 |
| Phosphorus | ↑ Improving | -67.32 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Ponca Lake A is a man-made reservoir impounded by the Ponca Lake (completed 1935), built primarily for water supply on the Turkey Creek; earth-type dam, 67 ft tall and 5,000 ft long.
- Surface area
- 1,159 ac
- Normal storage
- 14,440 ac-ft
- Max storage
- 23,700 ac-ft
- Drainage area
- 27.7 sq mi
- Hazard class
- High
- Owner
- City of Ponca City
Source: USACE National Inventory of Dams, NID ID OK11017 · Operator website · Matched by proximity (0.75 km)
Graded lakes near Ponca Lake A
Ponca Lake A has no grade, but these lakes within a short drive do.
Nearby Lakes in Kay County
Frequently asked questions about Ponca Lake A
Where is Ponca Lake A?
- Ponca Lake A 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 A?
- Ponca Lake A in Kay County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 237 µg/L. Chlorophyll-a (algae): 9.1 µg/L. Surface area: 1159 acres.
Is Ponca Lake A safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Ponca Lake A?
- Ponca Lake A has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Pageant Area. Public access is listed as yes.
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Where this data comes from
63 measurements from 1 monitoring station, 2012–2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kaw Nation, Oklahoma (Tribal)
KAWNATON_WQX63 samples · 2012–2015
Analytical methods
- Phosphorus, Total Ascorbic Acid Method
- Phosphorus, Recative (Orthophosphate) Ascorbic Acid Method
- Phosphorus by Colorimetry
- Phosphorus, Reactive (Orthophosphate) Ascorbic Acid Method
- Chlorophyll a-b-c Determination
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
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.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory