Beaver Lake
Washington County, ArkansasView mapDirections
Arkansas DEQ publishes the water-quality measurements for Beaver Lake. Here is what has been measured.
- Impaired · Turbidity
- Public access
- Limited data
Beaver Lake in Washington County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Water clarity: 9.4 ft visibility.
Beaver Lake is a lake in Washington County, Arkansas. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2022-07-20. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Beaver Lake is listed impaired under Clean Water Act §303(d) (IR 5A) for turbidity. Check local advisories before you swim.
Whether Beaver 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 Beaver Lake
These are the measurements Arkansas DEQ publishes for Beaver Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9.4 ft. TSI 45.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9.4ft | 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) | No reading 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. | 45 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
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Fishing Beaver Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2014–2022).
Water clarity
Improving6 years
EPA Impairment Status
Beaver Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5A).
Causes of impairment
Designated uses not supporting: Other.
Source: EPA ATTAINS assessment unit AR_11010001_4041 · Official waterbody report
Nearby Lakes in Washington County
Frequently asked questions about Beaver Lake
Where is Beaver Lake?
- Beaver 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 Beaver Lake?
- Beaver Lake in Washington County, Arkansas has water-quality measurements published by Arkansas DEQ, shown here as reported. Water clarity: 9.4 ft visibility.
Is Beaver Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Beaver Lake is listed impaired under Clean Water Act §303(d) (IR 5A) for turbidity. Check local advisories before you swim.
Can I fish at Beaver Lake?
- Public access to Beaver Lake is listed as yes on the lake record. 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.
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Where this data comes from
31 measurements from 1 monitoring station, 2014–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS31 samples · 2014–2022
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
Impairment status from EPA ATTAINS 303(d) database