Lil Base Lake
Pulaski County, Arkansas40 acresView mapDirections
Arkansas DEQ publishes the water-quality measurements for Lil Base Lake. Here is what has been measured.
- Limited data
Lil Base Lake in Pulaski County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Water clarity: 2.7 ft visibility. Chlorophyll-a (algae): 20.2 µg/L. Surface area: 40 acres.
Lil Base Lake is a 40-acre lake in Pulaski County, Arkansas.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2015-08-20. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lil Base 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 Lil Base Lake
These are the measurements Arkansas DEQ publishes for Lil Base Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.7 ft of visibility. Chlorophyll-a 20.2 µg/L. TSI 62.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 20.2µg/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. | 62 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lil Base Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
40 acres
No bathymetric survey has been published for Lil Base Lake, so its depth is not documented here.
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Fishing Lil Base Lake
Reservoir Info (USACE NID)
Lil Base Lake is a man-made reservoir impounded by the Wilson Lake Dam (completed 1958), built primarily for recreation on the Wilson Creek; earth-type dam, 35 ft tall and 400 ft long.
- Surface area
- 40 ac
- Normal storage
- 380 ac-ft
- Max storage
- 623 ac-ft
- Drainage area
- 0.7 sq mi
- Hazard class
- High
- Owner
- USAF AMC
Source: USACE National Inventory of Dams, NID ID AR00076 · Operator website · Matched by proximity (0.58 km)
Nearby Lakes in Pulaski County
Frequently asked questions about Lil Base Lake
Where is Lil Base Lake?
- Lil Base Lake is a lake in Pulaski County, Arkansas. Its water-quality measurements are published by Arkansas DEQ and shown on this page as reported.
What is the water quality of Lil Base Lake?
- Lil Base Lake in Pulaski County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Water clarity: 2.7 ft visibility. Chlorophyll-a (algae): 20.2 µg/L. Surface area: 40 acres.
Is Lil Base Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
6 measurements from 1 monitoring station, 2012–2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS Arkansas Water Science Center
USGS-AR6 samples · 2012–2015
Analytical methods
- Secchi disk method
- Plant pigments, sonication & 445
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.