Texarkana Water Hardness & Quality Report (2026)
Water Hardness
4.3 grains per gallon
Source
river
pH Level
7.4
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
122.1 mg/L
Est. Daily Cost
$0.20
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 Texarkana, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Texarkana | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.2 yrs | 8.5 yrs | -15% |
| Washing Machine | 10.9 yrs | 12 yrs | -9% |
| Water Heater | 12.7 yrs | 15 yrs | -15% |
Regional Water Comparison
How Texarkana compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Texarkana, Arkansas | 73.5 mg/L | 3 ppt | 🟡 Moderately Hard | river |
| Texarkana, Texas | 337 mg/L | 10.2 ppt | 🔴 Very Hard | mixed |
| Marshall, Texas | 190.5 mg/L | 7.1 ppt | 🔴 Very Hard | mixed |
| Shreveport, Louisiana | 143 mg/L | 12.5 ppt | 🟠 Hard | river |
| Mount Pleasant, Texas | 345.5 mg/L | 10.4 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Texarkana compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Texarkana | 73.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Texarkana's Water Unique?
Local geology and source profile
Texarkana, Arkansas, in Miller County — a major southwest Arkansas–northeast Texas twin-city (Texarkana is a unique bi-state city straddling the Arkansas–Texas border — Texarkana is simultaneously Texarkana, Arkansas (Miller County seat) and Texarkana, Texas (Bowie County seat); the Texas–Arkansas state line runs directly through the center of Texarkana's downtown (the famous Texarkana Post Office is the only federal building straddling a state line in the United States), making Texarkana one of the most distinctive geographic communities in America), birthplace of Scott Joplin (the 'King of Ragtime' — Scott Joplin, the most important composer in ragtime music history, was born in the Texarkana area; the Scott Joplin mural on the Texarkana Post Office is one of the city's most iconic landmarks), a diverse Miller County community with a significant African-American, working-class, and retail/service industry population, and a regional hub for southwest Arkansas and northeast Texas — draws its municipal water supply from Lake Texarkana via Texarkana Water Utilities. Water hardness in Texarkana measures 73.5 mg/L — classified as moderately soft.
Texarkana's moderate softness reflects the southwest Arkansas Red River Valley watershed's calcareous-poor geology. The Sulphur River watershed (Wright Patman Lake) drains Cretaceous Woodbine Sandstone (calcareous-poor). Texarkana Water Utilities treatment produces the moderately soft 73.5 mg/L.
With hardness at 73.5 mg/L, Texarkana residents enjoy moderately soft water. Texarkana Water Utilities consistently delivers water meeting all Arkansas DEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Lake Texarkana (Wright Patman Lake — Sulphur River watershed) via the Texarkana Water Utilities — the Miller County southwest Arkansas Red River Valley Texarkana corridor (Cretaceous calcareous-poor Woodbine Sandstone and Quaternary calcareous-poor Red River alluvium — the calcareous-poor southwest Arkansas–northeast Texas Red River Valley; effective treatment); moderately soft supply at 73.5 mg/L in Miller County.