Lake Avalon
Benton County, Arkansas56 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.
- 51 ft max depth
- Public access
- Limited data
Lake Avalon in Benton County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 27 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Surface area: 56 acres.
- Max depth
- ~51 ft est.
- Area
- 56 acres
- Phosphorus
- 27 µg/L
- Chlorophyll-a
- 17.5 µg/L
- Trend
- → Stable
- Public access
- Yes
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Watch Lake Avalon’s letter
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Why Lake Avalon 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 Avalon, 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 Avalon is a 56-acre lake in Benton County, Arkansas with an estimated average depth of about 51 feet. Phosphorus level is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2012-09-25. Grade methodology: LakeQuality methodology.
What Lake Avalon is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lake Avalon
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 27 µg/L. Chlorophyll-a 17.5 µg/L. TSI 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 27 µg/L | Not graded |
| Chlorophyll-a (Algae) | 17.5 µg/L | Not graded |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~51 ft est. |
| Average Depth | ~15 ft est. |
| Surface Area | 56 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 Avalon.
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 AvalonPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Avalon
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 Avalon is a man-made reservoir impounded by the Lake Avalon Dam (completed 1968), built primarily for recreation on the Sturgeon Creek; earth-type dam, 72 ft tall and 710 ft long.
- Surface area
- 56 ac
- Normal storage
- 1,400 ac-ft
- Max storage
- 2,000 ac-ft
- Drainage area
- 2.8 sq mi
- Hazard class
- Significant
- Owner
- Bella Vista Village Property Owners Association
Source: USACE National Inventory of Dams, NID ID AR00266 · Operator website
Graded lakes near Lake Avalon
Lake Avalon has no grade, but these lakes within a short drive do.
Nearby Lakes in Benton County
Frequently asked questions about Lake Avalon
Where is Lake Avalon?
- Lake Avalon 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 Avalon?
- Lake Avalon in Benton County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 27 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Surface area: 56 acres.
Is Lake Avalon safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Lake Avalon?
- No published bathymetric survey covers Lake Avalon, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 51 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 56 acres.
Are there boat ramps on Lake Avalon?
- Lake Avalon has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Avalon. Public access is listed as yes.
Explore Lake Avalon across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2012. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Arkansas Department of Environmental Quality
ARDEQH2O_WQX4 samples · 2012
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