Lil Base Lake
Pulaski County, Arkansas40 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.
- Limited data
Lil Base Lake in Pulaski County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.7 ft visibility. Chlorophyll-a (algae): 20.2 µg/L. Surface area: 40 acres.
- Clarity
- 2.7 ft
- Area
- 40 acres
- Chlorophyll-a
- 20.2 µg/L
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Watch Lil Base Lake’s letter
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Why Lil Base Lake 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 Lil Base Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
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.
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. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lil Base Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.7 ft of visibility. Chlorophyll-a 20.2 µg/L. TSI 62.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.7 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 20.2 µg/L | Not graded |
| Trophic State Index (TSI) | 62 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 40 acres |
No bathymetric survey has been published for Lil Base Lake, so its depth is not documented here.
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)
Graded lakes near Lil Base Lake
Lil Base Lake has no grade, but these lakes within a short drive do.
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. 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 Lil Base Lake?
- Lil Base Lake in Pulaski County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. 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?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Lil Base Lake across LakeQuality
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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)
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.