Lincoln Lake
Washington County, Arkansas89 acresView mapDirections
Arkansas DEQ publishes the water-quality measurements for Lincoln Lake. Here is what has been measured.
- Hypereutrophic
- 37 ft max depth
- Limited data
Lincoln Lake in Washington County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Phosphorus: 50 µg/L. Chlorophyll-a (algae): 41.6 µg/L. Surface area: 89 acres.
Lincoln Lake is a 89-acre highly nutrient-loaded hypereutrophic lake in Washington County, Arkansas with an estimated average depth of about 37 feet. Overall water quality is improving over recent sampling years. Compared to the 5 other monitored lakes in Washington County, Lincoln Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2026-02-23. Methodology: how these readings are compared.
Lincoln Lake covers about 89 acres in Washington County. If you are planning to stay, you can search lake houses and cabins around Lincoln Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lincoln 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 Lincoln Lake
These are the measurements Arkansas DEQ publishes for Lincoln 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 50 µg/L. Chlorophyll-a 41.6 µg/L. TSI 64.
| 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 | 50µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 41.6µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 64 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Lincoln Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~37 ft est.
Surface area
89 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Arkansas has not published bathymetry for Lincoln Lake.
Lake Size & Watershed
Watershed (drainage) area
12 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.6 mi
HydroLAKES / HydroSHEDS
Elevation
1,204 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.
Stays via Stay22
Stays near Lincoln Lake
Compare lakeside cabins, hotels, and vacation rentals near Lincoln Lake in Washington County, Arkansas — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Lincoln Lake are listed below.
Top-rated places to stay near Lincoln Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Arkansas’s top lakes →
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Fishing Lincoln Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2012–2025).
Phosphorus
Improving-2.76 µg/L/yr3 years
Chlorophyll-a
Stable-0.7 µg/L/yr4 years
Reservoir Info (USACE NID)
Lincoln Lake is a man-made reservoir impounded by the Muddy Fork Site 2 (completed 1963), built primarily for water supply on the Moore Creek; earth-type dam, 80 ft tall and 1,768 ft long.
- Surface area
- 89 ac
- Normal storage
- 1,668 ac-ft
- Max storage
- 7,002 ac-ft
- Drainage area
- 13.1 sq mi
- Hazard class
- Significant
- Owner
- City of Lincoln
All listed purposes: Water Supply;Recreation;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID AR00283 · Operator website · Matched by proximity (0.57 km)
Nearby Lakes in Washington County
Frequently asked questions about Lincoln Lake
Where is Lincoln Lake?
- Lincoln Lake is a lake in Washington County, Arkansas. Its water-quality measurements are published by Arkansas DEQ and shown on this page as reported.
What is the water quality of Lincoln Lake?
- Lincoln Lake in Washington County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Phosphorus: 50 µg/L. Chlorophyll-a (algae): 41.6 µg/L. Surface area: 89 acres.
Is Lincoln Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lincoln Lake?
- No published bathymetric survey covers Lincoln Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 37 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 89 acres.
Explore Lincoln Lake across LakeQuality
More lakes in Arkansas
Other Lakes in Arkansas
Hypereutrophic Lakes in Arkansas
Where this data comes from
30 measurements from 1 monitoring station, 2012–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Arkansas Department of Environmental Quality
ARDEQH2O_WQX30 samples · 2012–2026
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
- Turbidity by Nephelometry
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)