Rocky Mount Water Hardness & Quality Report (2026)
Water Hardness
9.4 grains per gallon
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
409.2 mg/L
Est. Daily Cost
$0.43
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Rocky Mount, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Rocky Mount | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.3 yrs | 8.5 yrs | -49% |
| Washing Machine | 7.6 yrs | 12 yrs | -37% |
| Water Heater | 9.2 yrs | 15 yrs | -39% |
Regional Water Comparison
How Rocky Mount compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rocky Mount, North Carolina | 161 mg/L | 8.4 ppt | 🟠 Hard | reservoir |
| Wilson, North Carolina | 174 mg/L | 9 ppt | 🟠 Hard | reservoir |
| Greenville, North Carolina | 94.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | reservoir |
| Roanoke Rapids, North Carolina | 138 mg/L | 7.2 ppt | 🟠 Hard | reservoir |
| Goldsboro, North Carolina | 167 mg/L | 8.7 ppt | 🟠 Hard | reservoir |
National Benchmark
How Rocky Mount compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rocky Mount | 161 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rocky Mount's Water Unique?
Local geology and source profile
Rocky Mount, North Carolina, spanning Nash and Edgecombe Counties on the Tar River — a historic eastern North Carolina tobacco and textile manufacturing city, the birthplace of Thelonious Monk (jazz legend), and home of North Carolina Wesleyan University — draws its municipal water supply from the Tar River via the City of Rocky Mount Public Utilities Water Division, treating Tar River water for the Rocky Mount area. Water hardness in Rocky Mount measures 161 mg/L — classified as hard.
Rocky Mount's hard supply reflects the Tar River's North Carolina Piedmont calcareous watershed. The Tar River above Rocky Mount drains: the North Carolina Piedmont crystalline belt — the Carolina Slate Belt (Neoproterozoic–Cambrian Hyco, Virgilina, and Tillery Formations — Piedmont metavolcanic and calcareous metasedimentary arc terrain with some calcareous marble horizons); the Triassic Dan River–Danville Basin (calcareous Triassic red bed arkose and mudstone — the Durham Group Formation extending into Nash County); and the North Carolina Coastal Plain Cretaceous formations (calcareous marine formations of the eastern Nash–Edgecombe area). The Piedmont calcareous terrain and Triassic basin input produce the moderately hard 161 mg/L at Rocky Mount.
At 161 mg/L, Rocky Mount residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. City of Rocky Mount Public Utilities consistently delivers water meeting all North Carolina DHHS and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Tar River via the City of Rocky Mount Public Utilities Water Division — the Tar River watershed draining the North Carolina Piedmont crystalline belt (Triassic Dan River–Danville Basin and the Carolina Slate Belt Neoproterozoic metavolcanic and metasedimentary terrain) of Nash and Edgecombe Counties; hard supply at 161 mg/L in Nash County.