Gainesville Water Hardness & Quality Report (2026)
Water Hardness
24 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1277.1 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 Gainesville, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Gainesville | 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 Gainesville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Gainesville, Texas | 411 mg/L | 11.8 ppt | 🔴 Very Hard | mixed |
| Denton, Texas | 170.5 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| Corinth, Texas | 169 mg/L | 6.6 ppt | 🟠 Hard | mixed |
| Little Elm, Texas | 197 mg/L | 7.2 ppt | 🔴 Very Hard | mixed |
| Prosper, Texas | 368.5 mg/L | 10.9 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Gainesville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Gainesville | 411 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Gainesville's Water Unique?
Local geology and source profile
Gainesville, Texas, in Cooke County — the Cooke County seat adjacent to Muenster and Lindsay on the Red River in north Texas, on the Oklahoma border near Lake Texoma — receives its municipal water from the Gainesville Water Division, drawing from Lake Kiowa (Cooke County) and the Elm Fork of the Trinity River through the north Texas distribution system.
The extremely hard 411 mg/L hardness and very high TDS of 1,277.1 mg/L make Gainesville one of the hardest water supplies in the entire USA — matching and slightly exceeding Mercedes TX (402.5 mg/L). The Red River-Trinity watershed at Cooke County drains the Permian redbeds — Artesia Formation (calcareous), Permian Wichita Formation (evaporitic gypsum and halite — major TDS contributor), and Cretaceous Eagle Ford Formation (calcareous chalk). The cumulative Permian evaporitic and calcareous loading across the Red River drainage produces the exceptional north Texas hardness and TDS.
At 411 mg/L with TDS 1,277, Gainesville's water is one of the hardest in the USA. 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 11.8 ppt warrants a certified reverse osmosis drinking water filter — the north Texas-Oklahoma border corridor PFAS background and the Cooke County industrial corridor contribute to Gainesville's very elevated readings.
Geology & Source: Gainesville in Cooke County draws from the Gainesville Water Division on Lake Kiowa and the Elm Fork Trinity (Cooke County, north Texas) — the Red River-Trinity watershed at Cooke County drains the Permian redbeds (Artesia calcareous, Wichita Formation evaporitic) and Cretaceous Eagle Ford calcareous — Texas Cooke County Red River-Trinity Permian calcareous watershed produces extremely hard water at 411 mg/L with TDS 1277.1 mg/L.