Highland Village Water Hardness & Quality Report (2026)
Water Hardness
21.8 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1115.1 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 Highland Village, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Highland Village | 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 Highland Village compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Highland Village, Texas | 373.5 mg/L | 11 ppt | 🔴 Very Hard | mixed |
| Corinth, Texas | 169 mg/L | 6.6 ppt | 🟠 Hard | mixed |
| Lewisville, Texas | 99.5 mg/L | 5.2 ppt | 🟡 Moderately Hard | mixed |
| Flower Mound, Texas | 244.5 mg/L | 8.2 ppt | 🔴 Very Hard | mixed |
| Little Elm, Texas | 197 mg/L | 7.2 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Highland Village compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Highland Village | 373.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Highland Village's Water Unique?
Local geology and source profile
Highland Village, Texas, in Denton County — a Denton County city adjacent to Lewisville and Corinth on Lake Lewisville in the north Dallas-Fort Worth metro — receives its municipal water from the Trinity River Authority, drawing from Lake Lewisville (Elm Fork of the Trinity River, Denton County) through the north DFW water treatment system.
The extremely hard 373.5 mg/L hardness and very high TDS of 1,115.1 mg/L make Highland Village one of the hardest water supplies in the USA — reflecting the upper Trinity River watershed's intense calcareous and evaporitic character. Lake Lewisville (Elm Fork Trinity) drains the north Texas Cretaceous Woodbine Formation (calcareous), Cretaceous Eagle Ford Formation (calcareous chalk-marl), and upstream Permian Wichita Group (evaporitic gypsum and halite — the major TDS contributor from the Red River-Permian basin drainage). The cumulative Cretaceous calcareous and Permian evaporitic loading produces the exceptional north DFW hardness and TDS.
At 373.5 mg/L with TDS 1,115, Highland Village's water is extremely hard. A water softener is absolutely essential. Scale forms immediately on all surfaces, appliance lifespans are critically shortened, and water heaters fail within 2 years without treatment. The PFAS level of 11.0 ppt warrants a certified reverse osmosis drinking water filter — the Denton County north DFW industrial corridor and the Trinity River PFAS complex contribute to Highland Village's elevated readings.
Geology & Source: Highland Village in Denton County draws from the Trinity River Authority on Lake Lewisville (Denton County, north Dallas metro) — Lake Lewisville drains the Elm Fork Trinity watershed (Cretaceous Eagle Ford calcareous, Permian Wichita evaporitic redbeds) — Texas Denton County Lake Lewisville Cretaceous-Permian calcareous watershed produces extremely hard water at 373.5 mg/L with TDS 1115.1 mg/L in this Denton County Texas city.