San Benito 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 San Benito, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In San Benito | 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 San Benito compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ San Benito, Texas | 411 mg/L | 11.8 ppt | 🔴 Very Hard | mixed |
| Harlingen, Texas | 171 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| Brownsville, Texas | 336 mg/L | 10.2 ppt | 🔴 Very Hard | mixed |
| Mercedes, Texas | 402.5 mg/L | 11.6 ppt | 🔴 Very Hard | mixed |
| Weslaco, Texas | 247 mg/L | 8.3 ppt | 🔴 Very Hard | mixed |
National Benchmark
How San Benito compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ San Benito | 411 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your San Benito home
Shop water softeners on Amazon.com →
What Makes San Benito's Water Unique?
Local geology and source profile
San Benito, Texas, in Cameron County in the southern Rio Grande Valley near the Mexico border, receives its municipal water from the San Benito Water Works, drawing from the Rio Grande River through the Rio Grande Valley's irrigation canal and diversion system. The Lower Rio Grande Valley's municipalities depend almost entirely on Rio Grande water — distributed through the Hidalgo-Cameron Regional canal system — supplemented by local groundwater wells in the Cameron County alluvial plain. San Benito's water is treated at a municipal plant before distribution through the community's aging grid.
The extraordinarily hard 411 mg/L hardness and extreme TDS of 1,277.1 mg/L place San Benito among the most mineralologically concentrated municipal water supplies in the United States. The Rio Grande carries dissolved mineral loads from its 1,900-mile journey through the Chihuahuan Desert — passing through Permian Castile Formation evaporite terrain (gypsum and anhydrite beds in the Delaware Basin), Cretaceous Edwards Plateau limestone, and the Big Bend canyon carbonate corridor. Desert evaporation in Amistad Reservoir and along the lower river concentrates these minerals dramatically. By the time the river reaches Cameron County, every liter carries extraordinary amounts of calcium sulfate, calcium carbonate, magnesium, and sodium.
At 411 mg/L, San Benito residents face among the most extreme hard water conditions of any US city. Scale forms immediately on all water contact surfaces — within hours of contact with fixtures, glasses, and tiles. Appliances degrade rapidly without aggressive treatment: kettles need descaling weekly, water heaters accumulate heavy scale deposits within months, and dishwashers cannot produce acceptable glassware results without water softener salts. A whole-house water softener is non-negotiable for San Benito homeowners. Additionally, the TDS of 1,277 mg/L produces very salty, mineral-heavy drinking water — a certified reverse osmosis system at every drinking tap is a genuine quality-of-life necessity. The PFAS level of 11.8 ppt adds further urgency for comprehensive drinking water treatment.
Geology & Source: San Benito in Cameron County draws from the Rio Grande River — the Rio Grande carries dissolved Permian Castile Formation evaporites (gypsum, anhydrite, halite) and Cretaceous Edwards Plateau limestone minerals, amplified by desert evaporative concentration — producing one of the hardest municipal supplies in the US at 411 mg/L with extreme TDS of 1,277 mg/L.