Randleman Lake
Randolph County, North Carolina3,070 acresView mapDirections
Nutrients and algae run above the regional average.
- Eutrophic
- #1 of 5 in the county
- Limited data
Randleman Lake in Randolph County, North Carolina has a water quality grade of D (Nutrient-rich). Water clarity: 3.2 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Surface area: 3070 acres.
- Clarity
- 3.2 ft
- Area
- 3,070 acres
- Type
- Eutrophic
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Stays near Randleman Lake
Compare lakeside cabins, hotels, and vacation rentals near Randleman Lake in Randolph 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 Randleman Lake are listed below.
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Randleman Lake is a 3,070-acre productive, nutrient-rich eutrophic lake in Randolph County, North Carolina. Water quality is graded D based on 2 sampling years through 2023. Compared to the 4 other monitored lakes in Randolph County, Randleman Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, NCDEQ, last sampled 2023-09-05. Grade methodology: LakeQuality methodology.
What Randleman Lake is good for
From access and monitoring records, not editorial picks.
- Big water3,070 acres
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)
Very murky, less than 3.2 ft of visibility. Phosphorus 30 µg/L. Chlorophyll-a 17.5 µg/L. TSI 57. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.2 ft | Not graded |
| Phosphorus | 30 µg/L | Fair |
| Chlorophyll-a (Algae) | 17.5 µg/L | Poor |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 3,070 acres |
No bathymetric survey has been published for Randleman Lake, so its depth is not documented here.
Fishing Randleman Lake
Reservoir Info (USACE NID)
Randleman Lake is a man-made reservoir impounded by the Randleman Dam (completed 2002), built primarily for recreation on the Deep River; earth-type dam, 102 ft tall and 2,895 ft long.
- Surface area
- 3,070 ac
- Normal storage
- 93,600 ac-ft
- Max storage
- 121,200 ac-ft
- Drainage area
- 169 sq mi
- Hazard class
- High
- Owner
- Piedmont Triad Regional Water Authority
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID NC05570 · Operator website
County Ranking
Ranked #1 of 5 lakes in Randolph County
Nearby Lakes in Randolph County
Frequently asked questions about Randleman Lake
Where is Randleman Lake?
- Randleman Lake is a lake in Randolph 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 Randleman Lake?
- Randleman Lake in Randolph County, North Carolina has a water quality grade of D (Nutrient-rich). Water clarity: 3.2 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 17.5 µg/L. Surface area: 3070 acres.
Is Randleman Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Randleman Lake across LakeQuality
Species activity outlook by water temperature and season
Where to stay at North Carolina's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
North Carolina's cleanest and most-polluted lakes, ranked
More North Carolina Lake Rankings
Ranked by overall water quality grade
Top 25 by Secchi water clarity
Grade A/B + low algae filter
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Full state directory
Other Grade D Lakes in North Carolina
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Where this data comes from
181 measurements from 9 monitoring stations, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Carolina Dept of Environmental Quality NCDEQ-DWR WQX
21NC03WQ181 samples · 2023
Analytical methods
- WSSSOP
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (9)
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.