Big Eleven Lake Park Lake
Wyandotte County, KansasView mapDirections
Not enough samples to grade — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. No letter yet. Here is what we do have.
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Big Eleven Lake Park Lake in Wyandotte County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.8 ft visibility. Phosphorus: 147 µg/L. Chlorophyll-a (algae): 45.2 µg/L.
- Clarity
- 2.8 ft
- Phosphorus
- 147 µg/L
- Chlorophyll-a
- 45.2 µg/L
- Trend
- ↓ Declining
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Watch Big Eleven Lake Park Lake’s letter
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Why Big Eleven Lake Park Lake 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 Big Eleven Lake Park Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, phosphorus 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 KDHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Big Eleven Lake Park Lake is a lake in Wyandotte County, Kansas. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2015-10-12. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Big Eleven Lake Park Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water quality measurements for Big Eleven Lake Park Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.8 ft of visibility. Phosphorus 147 µg/L. Chlorophyll-a 45.2 µg/L. TSI 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | Not graded |
| Phosphorus | 147 µg/L | Not graded |
| Chlorophyll-a (Algae) | 45.2 µg/L | Not graded |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Big Eleven Lake Park Lake
Water Quality Trend: ↓ Declining
Based on 10 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.015 m/yr | 4 |
| Phosphorus | ↓ Declining | +8.31 µg/L/yr | 10 |
| Chlorophyll-a | → Stable | -0.14 µg/L/yr | 10 |
EPA Impairment Status
Big Eleven Lake Park Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit KS-LM067101 · Official waterbody report · Matched by proximity (0.08 km)
Graded lakes near Big Eleven Lake Park Lake
Big Eleven Lake Park Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Wyandotte County
Frequently asked questions about Big Eleven Lake Park Lake
Where is Big Eleven Lake Park Lake?
- Big Eleven Lake Park Lake is a lake in Wyandotte County, Kansas. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Big Eleven Lake Park Lake?
- Big Eleven Lake Park Lake in Wyandotte County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.8 ft visibility. Phosphorus: 147 µg/L. Chlorophyll-a (algae): 45.2 µg/L.
Is Big Eleven Lake Park Lake safe to swim in?
- The letter is not a swimming clearance. Big Eleven Lake Park Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Explore Big Eleven Lake Park Lake across LakeQuality
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Where this data comes from
57 measurements from 1 monitoring station, 2012–2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC57 samples · 2012–2015
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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
Impairment status from EPA ATTAINS 303(d) database