Lake Windsor
Benton County, Arkansas220 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.
- 41 ft max depth
- Public access
- Limited data
Lake Windsor in Benton County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 29 µg/L. Chlorophyll-a (algae): 9.1 µg/L. Surface area: 220 acres.
- Max depth
- ~41 ft est.
- Area
- 220 acres
- Phosphorus
- 29 µg/L
- Chlorophyll-a
- 9.1 µg/L
- Trend
- → Stable
- Public access
- Yes
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Watch Lake Windsor’s letter
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Why Lake Windsor 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 Lake Windsor, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
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 ADEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Windsor is a 220-acre lake in Benton County, Arkansas with an estimated average depth of about 41 feet. Phosphorus level is improving over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2016-05-24. Grade methodology: LakeQuality methodology.
What Lake Windsor is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lake Windsor
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 29 µg/L. Chlorophyll-a 9.1 µg/L. TSI 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 29 µg/L | Not graded |
| Chlorophyll-a (Algae) | 9.1 µg/L | Not graded |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~41 ft est. |
| Average Depth | ~19 ft est. |
| Surface Area | 220 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Arkansas has not published bathymetry for Lake Windsor.
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
- Lake WindsorPublic
- LondonPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Windsor
Water Quality Trend: → Stable
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -4 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +0.31 µg/L/yr | 4 |
Reservoir Info (USACE NID)
Lake Windsor is a man-made reservoir impounded by the Lake Windsor Dam (completed 1974), built primarily for recreation on the Tanyard Creek; earth-type dam, 95 ft tall and 1,228 ft long.
- Surface area
- 220 ac
- Normal storage
- 5,500 ac-ft
- Max storage
- 9,400 ac-ft
- Drainage area
- 11.3 sq mi
- Hazard class
- Significant
- Owner
- Bella Vista Village Property Owners Association
Source: USACE National Inventory of Dams, NID ID AR00265 · Operator website
Graded lakes near Lake Windsor
Lake Windsor has no grade, but these lakes within a short drive do.
Nearby Lakes in Benton County
Frequently asked questions about Lake Windsor
Where is Lake Windsor?
- Lake Windsor is a lake in Benton County, Arkansas. 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 Lake Windsor?
- Lake Windsor in Benton County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 29 µg/L. Chlorophyll-a (algae): 9.1 µg/L. Surface area: 220 acres.
Is Lake Windsor safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Lake Windsor?
- No published bathymetric survey covers Lake Windsor, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 41 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 220 acres.
Are there boat ramps on Lake Windsor?
- Lake Windsor has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Lake Windsor, London. Public access is listed as yes.
Explore Lake Windsor across LakeQuality
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Where this data comes from
37 measurements from 1 monitoring station, 2012–2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Arkansas Department of Environmental Quality
ARDEQH2O_WQX37 samples · 2012–2016
Analytical methods
- 4500 P J ~ Persulfate Method for Simultaneous Determination of Total Nitrogen and Total Phosphorus
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory