Loch Lomond Lake
Benton County, Arkansas477 acresView mapDirections
Arkansas DEQ publishes the water-quality measurements for Loch Lomond Lake. Here is what has been measured.
- 53 ft max depth
- Public access
- Limited data
Loch Lomond Lake in Benton County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 8.5 µg/L. Surface area: 477 acres.
Loch Lomond Lake is a 477-acre lake in Benton County, Arkansas with an estimated average depth of about 53 feet. Overall water quality 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. Methodology: how these readings are compared.
What Loch Lomond Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Loch Lomond Lake is safe to swim in today is a call for the Arkansas Division of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Loch Lomond Lake
These are the measurements Arkansas DEQ publishes for Loch Lomond Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 20 µg/L. Chlorophyll-a 8.5 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 20µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 8.5µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Loch Lomond Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~53 ft est.
Surface area
477 acres
Public access
Yes
Listed by Arkansas DEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Arkansas has not published bathymetry for Loch Lomond Lake.
Lake Size & Watershed
Watershed (drainage) area
13 sq mi
HydroLAKES / HydroSHEDS
Shoreline
9 mi
HydroLAKES / HydroSHEDS
Elevation
1,142 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.
Recreation & Access
- GrantonPublic
- Tiree ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Loch Lomond Lake
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Fishing Loch Lomond Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2012–2015).
Phosphorus
Improving-0.6 µg/L/yr4 years
Chlorophyll-a
Stable+0.07 µg/L/yr4 years
Reservoir Info (USACE NID)
Loch Lomond Lake is a man-made reservoir impounded by the Loch Lomond Dam (completed 1981), built primarily for recreation on the Sugar Creek-Tr; earth-type dam, 80 ft tall and 1,770 ft long.
- Surface area
- 477 ac
- Normal storage
- 14,093 ac-ft
- Max storage
- 23,099 ac-ft
- Drainage area
- 13.2 sq mi
- Hazard class
- High
- Owner
- Bella Vista Village Property Owners Association
Source: USACE National Inventory of Dams, NID ID AR01408 · Operator website
Nearby Lakes in Benton County
Frequently asked questions about Loch Lomond Lake
Where is Loch Lomond Lake?
- Loch Lomond Lake is a lake in Benton County, Arkansas. Its water-quality measurements are published by Arkansas DEQ and shown on this page as reported.
What is the water quality of Loch Lomond Lake?
- Loch Lomond Lake in Benton County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 8.5 µg/L. Surface area: 477 acres.
Is Loch Lomond Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Loch Lomond Lake?
- No published bathymetric survey covers Loch Lomond Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 53 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 477 acres.
Are there boat ramps on Loch Lomond Lake?
- Loch Lomond Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Granton, Tiree Park. Public access is listed as yes.
Can I fish at Loch Lomond Lake?
- Loch Lomond Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Arkansas's fish and wildlife agency, so check its current regulations before you go.
Explore Loch Lomond Lake across LakeQuality
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Where this data comes from
35 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_WQX35 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)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory