Lake Isaac Walton
Person County, North Carolina224 acresView mapDirections
Nutrients and algae run above the regional average.
- Eutrophic
- #3 of 3 in the county
- 48 ft max depth
- Limited data
Lake Isaac Walton in Person County, North Carolina has a water quality grade of D (Nutrient-rich). Water clarity: 3.4 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 26 µg/L. Surface area: 224 acres.
- Clarity
- 3.4 ft
- Max depth
- ~48 ft est.
- Area
- 224 acres
- Type
- Eutrophic
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Stays near Lake Isaac Walton
Compare lakeside cabins, hotels, and vacation rentals near Lake Isaac Walton in Person County, North Carolina — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lake Isaac Walton are listed below.
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Watch Lake Isaac Walton’s letter
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Lake Isaac Walton is a 224-acre productive, nutrient-rich eutrophic lake in Person County, North Carolina with an estimated average depth of about 48 feet. Water quality is graded D based on 2 sampling years through 2024. Compared to the 2 other monitored lakes in Person County, Lake Isaac Walton ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, NCDEQ, last sampled 2024-10-23. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 3.4 ft. Phosphorus 30 µg/L. Chlorophyll-a 26 µg/L. TSI 58. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.4 ft | Not graded |
| Phosphorus | 30 µg/L | Fair |
| Chlorophyll-a (Algae) | 26 µg/L | Poor |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~48 ft est. |
| Average Depth | ~15 ft est. |
| Surface Area | 224 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. North Carolina has not published bathymetry for Lake Isaac Walton.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Lake Isaac Walton
Reservoir Info (USACE NID)
Lake Isaac Walton is a man-made reservoir impounded by the Roxboro Municipal Lake Dam (completed 1955), built primarily for recreation on the Storys Creek; earth-type dam, 33 ft tall and 1,000 ft long.
- Surface area
- 224 ac
- Normal storage
- 2,450 ac-ft
- Max storage
- 4,125 ac-ft
- Drainage area
- 10.11 sq mi
- Hazard class
- High
- Owner
- City of Roxboro
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID NC00658 · Operator website · Matched by proximity (0.78 km)
County Ranking
Ranked #3 of 3 lakes in Person County
Nearby Lakes in Person County
Frequently asked questions about Lake Isaac Walton
Where is Lake Isaac Walton?
- Lake Isaac Walton is a lake in Person County, North Carolina. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Isaac Walton?
- Lake Isaac Walton in Person County, North Carolina has a water quality grade of D (Nutrient-rich). Water clarity: 3.4 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 26 µg/L. Surface area: 224 acres.
Is Lake Isaac Walton safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
How deep is Lake Isaac Walton?
- No published bathymetric survey covers Lake Isaac Walton, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 48 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 224 acres.
Explore Lake Isaac Walton across LakeQuality
5.3 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
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Where this data comes from
60 measurements from 3 monitoring stations, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Carolina Dept of Environmental Quality NCDEQ-DWR WQX
21NC03WQ60 samples · 2024
Analytical methods
- WSSSOP
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (3)
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)