Winfield City Lake
Cowley County, Kansas1,130 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.
- Impaired · Nutrients (phosphorus, nitrogen)
- 86 ft max depth
- Public access
- Limited data
Winfield City Lake in Cowley County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.6 ft visibility. Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 13 µg/L. Surface area: 1130 acres.
- Clarity
- 3.6 ft
- Max depth
- ~86 ft est.
- Area
- 1,130 acres
- Phosphorus
- 27.5 µg/L
- Chlorophyll-a
- 13 µg/L
- Public access
- Yes
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Watch Winfield City Lake’s letter
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Why Winfield City 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 Winfield City Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). 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.
Winfield City Lake is a 1,130-acre lake in Cowley County, Kansas with an estimated average depth of about 86 feet. Limited fish-species data available. Public access is available with 3 public boat landings.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2017-06-27. Grade methodology: LakeQuality methodology.
What Winfield City Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch3 documented ramps
- Big water1,130 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Winfield City 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 Winfield City Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 3.6 ft. Phosphorus 27.5 µg/L. Chlorophyll-a 13 µg/L. TSI 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.6 ft | Not graded |
| Phosphorus | 27.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 13 µg/L | Not graded |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~86 ft est. |
| Average Depth | ~68 ft est. |
| Surface Area | 1,130 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kansas has not published bathymetry for Winfield City Lake.
Lake Size & Watershed
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
- Timber Creek Lake EastPublic
- Timber Creek Lake CentralPublic
- Timber Creek Lake WestPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Winfield City Lake
Reservoir Info (USACE NID)
Winfield City Lake is a man-made reservoir impounded by the Timber Creek Mpd No 29 (completed 1970), built primarily for flood risk reduction on the Timber Creek; earth-type dam, 91 ft tall and 5,800 ft long.
- Surface area
- 1,130 ac
- Normal storage
- 19,800 ac-ft
- Max storage
- 65,300 ac-ft
- Drainage area
- 64.2 sq mi
- Hazard class
- High
- Owner
- WINFIELD, CITY OF
All listed purposes: Flood Risk Reduction;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID KS02453 · Operator website · Matched by proximity (0.56 km)
EPA Impairment Status
Winfield City 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-LM050801 · Official waterbody report
Graded lakes near Winfield City Lake
Winfield City Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cowley County
Frequently asked questions about Winfield City Lake
Where is Winfield City Lake?
- Winfield City Lake is a lake in Cowley County, Kansas. 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 Winfield City Lake?
- Winfield City Lake in Cowley County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.6 ft visibility. Phosphorus: 27.5 µg/L. Chlorophyll-a (algae): 13 µg/L. Surface area: 1130 acres.
Is Winfield City Lake safe to swim in?
- The letter is not a swimming clearance. Winfield City Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Winfield City Lake?
- No published bathymetric survey covers Winfield City Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 86 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 1130 acres.
Are there boat ramps on Winfield City Lake?
- Winfield City Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Timber Creek Lake East, Timber Creek Lake Central, Timber Creek Lake West. Public access is listed as yes.
Explore Winfield City Lake across LakeQuality
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Where this data comes from
5 measurements from 1 monitoring station, 2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX5 samples · 2017
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory