Big Eleven Lake
Wyandotte County, KansasView mapDirections
KDHE publishes the water-quality measurements for Big Eleven Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
Big Eleven Lake in Wyandotte County, Kansas has water-quality measurements published by KDHE, shown here as reported. Phosphorus: 124.4 µg/L. Chlorophyll-a (algae): 48.6 µg/L.
Big Eleven Lake is a highly nutrient-loaded hypereutrophic lake in Wyandotte County, Kansas. Overall water quality is declining over recent sampling years. Compared to the 3 other monitored lakes in Wyandotte County, Big Eleven Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2024-09-05. Methodology: how these readings are compared.
Swimming conditions
Readings onlyRecreation use not supported
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Big Eleven Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Big Eleven Lake is safe to swim in today is a call for the Kansas Department of Health and Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Big Eleven Lake
These are the measurements KDHE publishes for Big Eleven Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 124.4 µg/L. Chlorophyll-a 48.6 µg/L. TSI 71.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 124µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 48.6µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 71 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Big Eleven Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Big Eleven Lake
Compare lakeside cabins, hotels, and vacation rentals near Big Eleven Lake in Wyandotte County, Kansas — 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Big Eleven Lake are listed below.
Top-rated places to stay near Big Eleven Lake
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Fishing Big Eleven Lake
Water Quality Trend: Worsening
Based on 10 years of monitoring (2012–2024).
Water clarity
Stable4 years
Phosphorus
Worsening+8.31 µg/L/yr10 years
Chlorophyll-a
Stable-0.14 µg/L/yr10 years
EPA Impairment Status
Big Eleven Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Drinking water, Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit KS-LM067101 · Official waterbody report
Nearby Lakes in Wyandotte County
Frequently asked questions about Big Eleven Lake
Where is Big Eleven Lake?
- Big Eleven Lake is a lake in Wyandotte County, Kansas. Its water-quality measurements are published by KDHE and shown on this page as reported.
What is the water quality of Big Eleven Lake?
- Big Eleven Lake in Wyandotte County, Kansas has water-quality measurements published by KDHE, shown here as reported. Phosphorus: 124.4 µg/L. Chlorophyll-a (algae): 48.6 µg/L.
Is Big Eleven Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Big Eleven Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
68 measurements from 1 monitoring station, 2012–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- EPA R7
EPA_R7_WQX68 samples · 2012–2024
Analytical methods
- Nutrient Analysis
- Total Phosphorus After Block Digestion
- Chlorophyll a
- Fluorometric Analysis of Chlorophyll a (originally 2334.22A)
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Total Nitrogen Calculation
Monitoring station identifiers (1)
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
Impairment status from EPA ATTAINS 303(d) database