Weslaco Water Hardness & Quality Report (2026)
Water Hardness
14.4 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
636.2 mg/L
Est. Daily Cost
$0.66
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 Weslaco, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Weslaco | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.5 yrs | 12 yrs | -63% |
| Water Heater | 5.7 yrs | 15 yrs | -62% |
Regional Water Comparison
How Weslaco compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Weslaco, Texas | 247 mg/L | 8.3 ppt | 🔴 Very Hard | mixed |
| Donna, Texas | 268.5 mg/L | 8.8 ppt | 🔴 Very Hard | mixed |
| Mercedes, Texas | 402.5 mg/L | 11.6 ppt | 🔴 Very Hard | mixed |
| Alamo, Texas | 120 mg/L | 5.6 ppt | 🟠 Hard | mixed |
| San Juan, Texas | 432.5 mg/L | 12.2 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Weslaco compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Weslaco | 247 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Weslaco's Water Unique?
Local geology and source profile
Weslaco, Texas, in Hidalgo County — a major Rio Grande Valley city in the Lower Rio Grande Valley, a major agricultural and commercial community in the subtropical lower Rio Grande Valley (the Texas Valley's citrus, sugar cane, and vegetable farming center), part of the McAllen–Edinburg–Mission metropolitan area (the second largest city in the Rio Grande Valley), a significant Mexican-American and Tejano community, and a border cultural and commercial community adjacent to Reynosa, Tamaulipas — draws its municipal water supply from the Rio Grande via Hidalgo County Water Control. Water hardness in Weslaco measures 247 mg/L — classified as very hard.
Weslaco's very hard supply reflects the lower Rio Grande's extreme calcareous hardness. The Rio Grande at the lower Valley carries water draining: the Chihuahuan Desert (Permian calcareous evaporite — the Permian Basin of west Texas and New Mexico, with highly calcareous gypsum and anhydrite evaporite); Cretaceous calcareous limestone of the Trans-Pecos and Edwards Plateau; and Tertiary calcareous Rio Grande rift basin deposits. The Rio Grande at the lower Valley is among the hardest major river supplies in the nation. Minimal softening at Weslaco produces the very hard 247 mg/L.
At 247 mg/L, Weslaco residents face severe hard water challenges. Weekly descaling and appliance protection measures are strongly recommended. Hidalgo County Water Control consistently delivers water meeting all Texas TCEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: Rio Grande supply from the Rio Grande (Falcon Reservoir watershed) via the Hidalgo County Water Control and Improvement District — the Hidalgo County Texas Rio Grande Valley (Quaternary calcareous Rio Grande alluvium and Tertiary calcareous Eocene formations of the lower Rio Grande Valley; minimal softening at Weslaco); very hard supply at 247 mg/L — reflecting the Rio Grande's extreme calcareous evaporite-influenced hardness in the lower Valley.