Lake Ouachita is a mesotrophic lake in Garland County, Arkansas. Water quality is graded A based on 3 sampling years through 2019. Compared to the 10 other monitored lakes in Garland County, Lake Ouachita ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Arkansas DNR, last sampled 2019-08-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 15 ft down. Phosphorus level: 20 µg/L. Chlorophyll-a: 3.2 µg/L. Trophic State Index: 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 15 ft | A |
| Phosphorus | 20 µg/L | B |
| Chlorophyll-a (Algae) | 3.2 µg/L | A |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Lake Ouachita
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Fishing Lake Ouachita
Location
County Ranking
Ranked #1 of 11 lakes in Garland County
Nearby Lakes in Garland County
Explore Lake Ouachita across LakeGrade
More Arkansas Lake Rankings
Other Grade A Lakes in Arkansas
Mesotrophic Lakes in Arkansas
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2019-08-05
Monitoring stations: 1