Lake Sequoyah
Washington County, Arkansas490 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Limited data
Lake Sequoyah in Washington County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility. Surface area: 490 acres.
- Clarity
- 2.5 ft
- Area
- 490 acres
- Trend
- ↓ Declining
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Stays near Lake Sequoyah
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Watch Lake Sequoyah’s letter
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Why Lake Sequoyah has no grade
Lake Sequoyah has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Lake Sequoyah is Not Rated — not an F. Its 2.5-foot median from 5 readings collected 2017–2024 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. 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.
Lake Sequoyah is a 490-acre lake in Washington County, Arkansas. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled 2024-07-04. 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 Lake Sequoyah
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.5 ft of visibility. TSI 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 490 acres |
No bathymetric survey has been published for Lake Sequoyah, so its depth is not documented here.
Fishing Lake Sequoyah
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.067 m/yr | 4 |
| Phosphorus | ↓ Declining | +5 µg/L/yr | 3 |
| Chlorophyll-a | ↓ Declining | +4.7 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Lake Sequoyah is a man-made reservoir impounded by the Lake Sequoyah (completed 1960), built primarily for recreation on the White River; rockfill-type dam, 25 ft tall and 1,160 ft long.
- Surface area
- 490 ac
- Normal storage
- 3,200 ac-ft
- Max storage
- 6,000 ac-ft
- Drainage area
- 180 sq mi
- Hazard class
- Low
- Owner
- City of Fayetteville
All listed purposes: Recreation;Other.
Source: USACE National Inventory of Dams, NID ID AR00288 · Operator website
Graded lakes near Lake Sequoyah
Lake Sequoyah has no grade, but these lakes within a short drive do.
Nearby Lakes in Washington County
Frequently asked questions about Lake Sequoyah
Where is Lake Sequoyah?
- Lake Sequoyah is a lake in Washington County, Arkansas. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Lake Sequoyah?
- Lake Sequoyah in Washington County, Arkansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility. Surface area: 490 acres.
Is Lake Sequoyah safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Lake Sequoyah across LakeQuality
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Where this data comes from
5 measurements from 1 monitoring station, 2017–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS5 samples · 2017–2024
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.