Grassy Lake
Faulkner County, ArkansasView 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
Grassy Lake in Faulkner County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar.
- Trend
- → Stable
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Stays near Grassy Lake
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Watch Grassy Lake’s letter
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Why Grassy 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 Grassy Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
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.
Grassy Lake is a lake in Faulkner County, Arkansas. Phosphorus level is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2023-03-06. 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 Grassy Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples |
Fishing Grassy Lake
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +10 µg/L/yr | 3 |
| Chlorophyll-a | ↑ Improving | -18.2 µg/L/yr | 3 |
Graded lakes near Grassy Lake
Grassy Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Faulkner County
Frequently asked questions about Grassy Lake
Where is Grassy Lake?
- Grassy Lake is a lake in Faulkner 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 Grassy Lake?
- Grassy Lake in Faulkner County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar.
Is Grassy Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Grassy Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS2 samples · 2023
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.