Keller Water Hardness & Quality Report (2026)
Water Hardness
22 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1128 mg/L
Est. Daily Cost
$1.00
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 Keller, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Keller | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Keller compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Keller, Texas | 376.5 mg/L | 11 ppt | 🔴 Very Hard | mixed |
| Watauga, Texas | 187.5 mg/L | 7 ppt | 🔴 Very Hard | mixed |
| North Richland Hills, Texas | 314 mg/L | 9.7 ppt | 🔴 Very Hard | mixed |
| Colleyville, Texas | 418.5 mg/L | 11.9 ppt | 🔴 Very Hard | mixed |
| Southlake, Texas | 308 mg/L | 9.6 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Keller compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Keller | 376.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Keller's Water Unique?
Local geology and source profile
Keller, Texas, in Tarrant County north of Fort Worth — one of the most affluent communities in the DFW metroplex, a premier north Tarrant County residential community known for excellent schools (Keller ISD), major corporate headquarters (multiple Keller business parks), a community with some of the highest household incomes in Tarrant County — draws its municipal water supply from the Tarrant Regional Water District (TRWD) Eagle Mountain Lake via the City of Keller Water Division. Water hardness in Keller measures 376.5 mg/L — classified as very hard.
Keller's very hard supply — among the hardest in Tarrant County — reflects the north Tarrant County calcareous Cretaceous geology and the Keller distribution zone's characteristics. The TRWD Eagle Mountain Lake watershed drains the west Texas Cretaceous formations — Cretaceous Palo Duro Formation, Trinity Group (Paluxy Sand and Glen Rose Formation — the highly calcareous Glen Rose Formation is one of the most prominent calcareous formations in north Texas), and the Texas Rolling Plains calcareous Cretaceous terrain. The TRWD distributes this very calcareous supply through Keller's distribution infrastructure, producing the very hard 376.5 mg/L — among the highest hardness readings in the DFW metropolitan area.
At 376.5 mg/L, Keller residents face severe hard water challenges. Scale deposits form very rapidly on all fixtures and appliances — weekly descaling and appliance protection measures are strongly recommended. City of Keller Water Division consistently delivers water meeting all Texas TCEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: Surface water from the Tarrant Regional Water District (TRWD) Eagle Mountain Lake and Fort Worth system via the City of Keller Water Division — the Tarrant County north Fort Worth suburban corridor (Cretaceous Palo Duro Formation and Antlers Sand calcareous terrain and the Texas Rolling Plains calcareous Western Interior); very hard supply at 376.5 mg/L — reflecting the Tarrant County calcareous Cretaceous terrain at Keller.