Marais des Cygnes Wildlife Area Lake
Linn County, KansasView mapDirections
KDHE publishes the water-quality measurements for Marais des Cygnes Wildlife Area Lake. Here is what has been measured.
- 47 ft max depth
- Public access
- Limited data
Marais des Cygnes Wildlife Area Lake in Linn County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 0.5 ft visibility. Phosphorus: 2.3 µg/L. Chlorophyll-a (algae): 454 µg/L.
Marais des Cygnes Wildlife Area Lake is a lake in Linn County, Kansas with an estimated average depth of about 47 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2018-07-24. Methodology: how these readings are compared.
What Marais des Cygnes Wildlife Area Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Marais des Cygnes Wildlife Area 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 Marais des Cygnes Wildlife Area Lake
These are the measurements KDHE publishes for Marais des Cygnes Wildlife Area Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 0.5 ft of visibility. Phosphorus 2.3 µg/L. Chlorophyll-a 454 µg/L. TSI 65.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 0.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 2.3µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 454µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 65 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Marais des Cygnes Wildlife Area Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~47 ft est.
Public access
Yes
Listed by KDHE
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kansas has not published bathymetry for Marais des Cygnes Wildlife Area Lake.
Lake Size & Watershed
Watershed (drainage) area
2,801 sq mi
HydroLAKES / HydroSHEDS
Surface area
341 acres
HydroLAKES / HydroSHEDS
Shoreline
3.2 mi
HydroLAKES / HydroSHEDS
Elevation
791 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Unit G-SouthPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Frequently asked questions about Marais des Cygnes Wildlife Area Lake
Where is Marais des Cygnes Wildlife Area Lake?
- Marais des Cygnes Wildlife Area Lake is a lake in Linn County, Kansas. Its water-quality measurements are published by KDHE and shown on this page as reported.
What is the water quality of Marais des Cygnes Wildlife Area Lake?
- Marais des Cygnes Wildlife Area Lake in Linn County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 0.5 ft visibility. Phosphorus: 2.3 µg/L. Chlorophyll-a (algae): 454 µg/L.
Is Marais des Cygnes Wildlife Area Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Marais des Cygnes Wildlife Area Lake?
- No published bathymetric survey covers Marais des Cygnes Wildlife Area Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 47 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Marais des Cygnes Wildlife Area Lake?
- Marais des Cygnes Wildlife Area Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Unit G-South. Public access is listed as yes.
Can I fish at Marais des Cygnes Wildlife Area Lake?
- Marais des Cygnes Wildlife Area Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Kansas's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
4 measurements from 1 monitoring station, 2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX4 samples · 2018
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory