Pleasanton Reservoir
Linn County, Kansas27 acresView mapDirections
KDHE publishes the water-quality measurements for Pleasanton Reservoir. Here is what has been measured.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- 30 ft max depth
- Public access
- Limited data
Pleasanton Reservoir in Linn County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 22.5 µg/L. Chlorophyll-a (algae): 16 µg/L. Surface area: 26.6 acres.
Pleasanton Reservoir is a 27-acre productive, nutrient-rich eutrophic lake in Linn County, Kansas with an estimated average depth of about 30 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 1 other monitored lakes in Linn County, Pleasanton Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2018-06-26. 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. Pleasanton Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Pleasanton Reservoir 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 Pleasanton Reservoir
These are the measurements KDHE publishes for Pleasanton Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4.3 ft. Phosphorus 22.5 µg/L. Chlorophyll-a 16 µg/L. TSI 54.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 22.5µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 16µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 54 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Pleasanton Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~30 ft est.
Surface area
27 acres
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 Pleasanton Reservoir.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.5 mi
HydroLAKES / HydroSHEDS
Elevation
830 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.
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Fishing Pleasanton Reservoir
Water quality readings over time
3 seasons of samples on record (2015–2018). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening3 years
Phosphorus
Worsening+2.29 µg/L/yr3 years
Chlorophyll-a
Worsening+2.95 µg/L/yr3 years
Reservoir Info (USACE NID)
Pleasanton Reservoir is a man-made reservoir impounded by the Pleasanton Lake (completed 1935), built primarily for water supply on the Muddy Creek; earth-type dam, 29 ft tall and 2,900 ft long.
- Surface area
- 26.6 ac
- Normal storage
- 208.8 ac-ft
- Max storage
- 394.9 ac-ft
- Drainage area
- 0.9 sq mi
- Hazard class
- High
- Owner
- PLEASANTON, CITY OF
Source: USACE National Inventory of Dams, NID ID KS02498 · Operator website
EPA Impairment Status
Pleasanton Reservoir 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-LM044201 · Official waterbody report
Nearby Lakes in Linn County
Frequently asked questions about Pleasanton Reservoir
Where is Pleasanton Reservoir?
- Pleasanton Reservoir 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 Pleasanton Reservoir?
- Pleasanton Reservoir in Linn County, Kansas has water-quality measurements published by KDHE, shown here as reported. Water clarity: 4.3 ft visibility. Phosphorus: 22.5 µg/L. Chlorophyll-a (algae): 16 µg/L. Surface area: 26.6 acres.
Is Pleasanton Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Pleasanton Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Pleasanton Reservoir?
- No published bathymetric survey covers Pleasanton Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 30 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 26.6 acres.
Can I fish at Pleasanton Reservoir?
- Public access to Pleasanton Reservoir is listed as yes on the lake record. 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
13 measurements from 1 monitoring station, 2015–2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX13 samples · 2015–2018
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)