Washington Co State Fishing Lake
Washington County, Kansas111 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 · Noxious aquatic plants
- 34 ft max depth
- Public access
- Limited data
Washington Co State Fishing Lake in Washington County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.4 ft visibility. Phosphorus: 110 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Surface area: 111 acres.
- Clarity
- 2.4 ft
- Max depth
- ~34 ft est.
- Area
- 111 acres
- Phosphorus
- 110 µg/L
- Chlorophyll-a
- 17.5 µg/L
- Public access
- Yes
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Watch Washington Co State Fishing Lake’s letter
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Why Washington Co State Fishing 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 Washington Co State Fishing 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.
Washington Co State Fishing Lake is a 111-acre lake in Washington County, Kansas with an estimated average depth of about 34 feet. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2017-08-29. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Washington Co State Fishing Lake is listed impaired under Clean Water Act §303(d) (IR 5) for noxious aquatic plants, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
Water quality measurements for Washington Co State Fishing Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.4 ft of visibility. Phosphorus 110 µg/L. Chlorophyll-a 17.5 µg/L. TSI 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.4 ft | Not graded |
| Phosphorus | 110 µg/L | Not graded |
| Chlorophyll-a (Algae) | 17.5 µg/L | Not graded |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~34 ft est. |
| Average Depth | ~12 ft est. |
| Surface Area | 111 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 Washington Co State Fishing 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.
Fishing Washington Co State Fishing Lake
Reservoir Info (USACE NID)
Washington Co State Fishing Lake is a man-made reservoir impounded by the Washington State Fishing Lake (completed 1957), built primarily for recreation on the Devils Creek; earth-type dam, 49 ft tall and 1,210 ft long.
- Surface area
- 111 ac
- Normal storage
- 1,080 ac-ft
- Max storage
- 3,194 ac-ft
- Drainage area
- 6.42 sq mi
- Hazard class
- Significant
- Owner
- KANSAS DEPT OF WILDLIFE PARKS & TOURISM
All listed purposes: Recreation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID KS00898 · Operator website · Matched by proximity (0.26 km)
EPA Impairment Status
Washington Co State Fishing Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit KS-LM010901 · Official waterbody report · Matched by proximity (0.41 km)
Graded lakes near Washington Co State Fishing Lake
Washington Co State Fishing Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Washington County
Frequently asked questions about Washington Co State Fishing Lake
Where is Washington Co State Fishing Lake?
- Washington Co State Fishing Lake is a lake in Washington 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 Washington Co State Fishing Lake?
- Washington Co State Fishing Lake in Washington County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.4 ft visibility. Phosphorus: 110 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Surface area: 111 acres.
Is Washington Co State Fishing Lake safe to swim in?
- The letter is not a swimming clearance. Washington Co State Fishing Lake is listed impaired under Clean Water Act §303(d) (IR 5) for noxious aquatic plants, nutrients (phosphorus, nitrogen), oxygen depletion (low DO). Check local advisories before you swim.
How deep is Washington Co State Fishing Lake?
- No published bathymetric survey covers Washington Co State Fishing Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 34 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 111 acres.
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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)