Lake Roxboro
Caswell County, North CarolinaView mapDirections
Nutrients and algae run well above the regional average.
↓ down from D at the last regrade
- Hypereutrophic
- #2 of 2 in the county
- 44 ft max depth
Lake Roxboro in Caswell County, North Carolina has a water quality grade of F (Algae-prone). Water clarity: 3 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 33 µg/L.
- Clarity
- 3 ft
- Max depth
- ~44 ft est.
- Type
- Hypereutrophic
- Trend
- ↑ Improving
Stays via Stay22
Stays near Lake Roxboro
Compare lakeside cabins, hotels, and vacation rentals near Lake Roxboro in Caswell 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 Roxboro are listed below.
Top-rated places to stay near Lake Roxboro
Prices for Sep 4–6, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at North Carolina’s top lakes →
Watch Lake Roxboro’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Lake Roxboro is a highly nutrient-loaded hypereutrophic lake in Caswell County, North Carolina with an estimated average depth of about 44 feet. Water quality is graded F based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Compared to the 1 other monitored lakes in Caswell County, Lake Roxboro ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, NCDEQ, last sampled 2024-10-22. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyAlgae risk
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 F is nutrients and algae, not a swimming clearance. Lake Roxboro is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
Very murky, less than 3 ft of visibility. Phosphorus 30 µg/L. Chlorophyll-a 33 µg/L. TSI 60. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | Not graded |
| Phosphorus | 30 µg/L | Fair |
| Chlorophyll-a (Algae) | 33 µg/L | Poor |
| Trophic State Index (TSI) | 60 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~44 ft est. |
| Average Depth | ~21 ft est. |
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 Roxboro.
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 Roxboro
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↑ Improving | -2.5 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -6.25 µg/L/yr | 2 |
EPA Impairment Status
Lake Roxboro is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NC22-58-4-(1.4)a · Official waterbody report · Matched by proximity (2 km)
County Ranking
Ranked #2 of 2 lakes in Caswell County
Nearby Lakes With Higher Grades
Lake Roxboro holds Grade F. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Caswell County
Frequently asked questions about Lake Roxboro
Where is Lake Roxboro?
- Lake Roxboro is a lake in Caswell County, North Carolina. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Roxboro?
- Lake Roxboro in Caswell County, North Carolina has a water quality grade of F (Algae-prone). Water clarity: 3 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 33 µg/L.
Is Lake Roxboro safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Lake Roxboro is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
How deep is Lake Roxboro?
- No published bathymetric survey covers Lake Roxboro, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 44 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Lake Roxboro across LakeQuality
13.1 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
Where to stay at North Carolina's top lakes, each with its grade
Very high nutrients, dense algae, poor 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
Panfish-rich, public access
Full state directory
Other Grade F Lakes in North Carolina
Hypereutrophic Lakes in North Carolina
Where this data comes from
105 measurements from 3 monitoring stations, 2022–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Carolina Dept of Environmental Quality NCDEQ-DWR WQX
21NC03WQ105 samples · 2022–2024
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
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)