Lake Rhodhiss
Caldwell County, North CarolinaView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- #1 of 1 in the county
- 55 ft max depth
- Public access
- Limited data
Lake Rhodhiss in Caldwell County, North Carolina has a water quality grade of C (Fair). Phosphorus: 30 µg/L. Chlorophyll-a (algae): 11 µg/L.
- Max depth
- ~55 ft est.
- Type
- Eutrophic
- Public access
- Yes
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Lake Rhodhiss is a productive, nutrient-rich eutrophic lake in Caldwell County, North Carolina with an estimated average depth of about 55 feet. Water quality is graded C based on 2 sampling years through 2022. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, NCDEQ, last sampled 2022-09-07. Grade methodology: LakeQuality methodology.
What Lake Rhodhiss is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
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 C is nutrients and algae, not a swimming clearance. Lake Rhodhiss is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
Water Quality Grade: C (Fair)
No clarity data. Phosphorus 30 µg/L. Chlorophyll-a 11 µg/L. TSI 54. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 30 µg/L | Fair |
| Chlorophyll-a (Algae) | 11 µg/L | Fair |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~55 ft est. |
| Average Depth | ~42 ft est. |
| Public Access | Yes |
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 Rhodhiss.
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.
Recreation & Access
- Conley CreekPublic
- Castle BridgePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Rhodhiss
EPA Impairment Status
Lake Rhodhiss 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 NC11-44-(3) · Official waterbody report · Matched by proximity (2.69 km)
County Ranking
Ranked #1 of 1 lakes in Caldwell County
Nearby Lakes in Caldwell County
Frequently asked questions about Lake Rhodhiss
Where is Lake Rhodhiss?
- Lake Rhodhiss is a lake in Caldwell County, North Carolina. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Rhodhiss?
- Lake Rhodhiss in Caldwell County, North Carolina has a water quality grade of C (Fair). Phosphorus: 30 µg/L. Chlorophyll-a (algae): 11 µg/L.
Is Lake Rhodhiss safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Lake Rhodhiss is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown). Check local advisories before you swim.
How deep is Lake Rhodhiss?
- No published bathymetric survey covers Lake Rhodhiss, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 55 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Are there boat ramps on Lake Rhodhiss?
- Lake Rhodhiss has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Conley Creek, Castle Bridge. Public access is listed as yes.
Explore Lake Rhodhiss 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
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More North Carolina Lake Rankings
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Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
Other Grade C Lakes in North Carolina
Eutrophic Lakes in North Carolina
Where this data comes from
49 measurements from 3 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Carolina Dept of Environmental Quality NCDEQ-DWR WQX
21NC03WQ49 samples · 2022
Analytical methods
- 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)
Named boat-access points from the USGS National Boat Ramps inventory