Brentwood Estates Water Hardness & Quality Report (2026)
Water Hardness
7.2 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
220.1 mg/L
Est. Daily Cost
$0.33
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 Brentwood Estates, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In Brentwood Estates | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.5 yrs | 8.5 yrs | -35% |
| Washing Machine | 9 yrs | 12 yrs | -25% |
| Water Heater | 10.7 yrs | 15 yrs | -29% |
Regional Water Comparison
How Brentwood Estates compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Brentwood Estates, Tennessee | 123 mg/L | 4.2 ppt | 🟠 Hard | reservoir |
| Brentwood, Tennessee | 122.5 mg/L | 4.1 ppt | 🟠 Hard | reservoir |
| Franklin, Tennessee | 103.5 mg/L | 3.5 ppt | 🟡 Moderately Hard | reservoir |
| Nashville, Tennessee | 125.5 mg/L | 4.2 ppt | 🟠 Hard | reservoir |
| La Vergne, Tennessee | 170.5 mg/L | 5.7 ppt | 🟠 Hard | reservoir |
National Benchmark
How Brentwood Estates compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Brentwood Estates | 123 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Brentwood Estates's Water Unique?
Local geology and source profile
Brentwood Estates, Tennessee, in Williamson County — a major north Williamson County Nashville suburban community (Brentwood Estates is within the broader Brentwood community — one of the most affluent and prestigious Nashville suburbs; Brentwood and Williamson County collectively represent one of the wealthiest counties in Tennessee and one of the wealthiest counties in the United States; Brentwood is home to numerous country music industry executives, recording artists, and a highly affluent professional population), a diverse Williamson County community with a primarily affluent professional, country music industry, and healthcare executive population, home of significant corporate campus development (Brentwood's Maryland Farms area is one of the most important suburban office park communities in Middle Tennessee), adjacent to Cool Springs (one of the most significant retail and commercial developments in Tennessee), and one of the most desirable residential communities in the Nashville metro — draws its municipal water supply via Tennessee American Water. Water hardness in Brentwood Estates measures 123 mg/L — classified as moderately hard.
Brentwood Estates's moderate hardness reflects the north Williamson County Nashville Basin carbonate geology with effective treatment. The Cumberland River watershed at Brentwood–Williamson County drains the Ordovician Carters and Hermitage Limestone (calcareous-moderate carbonate). Tennessee American Water distributes with effective treatment, producing the moderate 123 mg/L.
At 123 mg/L, Brentwood Estates residents encounter moderate scale accumulation. Monthly cleaning is recommended. Tennessee American Water consistently delivers water meeting all Tennessee DEC and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Cumberland River (J. Percy Priest Lake) via the Tennessee American Water or Brentwood Utilities — the Williamson County north Tennessee Nashville suburban Brentwood corridor (Ordovician calcareous Carters and Hermitage Limestone — the calcareous-moderate north Tennessee Nashville Basin carbonate; Williamson County supply with effective treatment); moderately hard supply at 123 mg/L in Williamson County.