Seguin Water Hardness & Quality Report (2026)
Water Hardness
14.7 grains per gallon
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
649.9 mg/L
Est. Daily Cost
$0.67
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 Seguin, your appliances are currently losing 33% efficiency due to mineral buildup.
| Appliance | In Seguin | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4.3 yrs | 12 yrs | -64% |
| Water Heater | 5.6 yrs | 15 yrs | -63% |
Regional Water Comparison
How Seguin compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Seguin, Texas | 251 mg/L | 8.4 ppt | 🔴 Very Hard | mixed |
| New Braunfels, Texas | 147.5 mg/L | 6.2 ppt | 🟠 Hard | mixed |
| Cibolo, Texas | 273 mg/L | 8.8 ppt | 🔴 Very Hard | mixed |
| Schertz, Texas | 189.5 mg/L | 7.1 ppt | 🔴 Very Hard | mixed |
| San Marcos, Texas | 440 mg/L | 4.6 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Seguin compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Seguin | 251 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Seguin's Water Unique?
Local geology and source profile
Seguin, Texas, the Guadalupe County seat — a major south-central Texas Guadalupe River Valley city (Seguin is the Guadalupe County seat — a significant south-central Texas city on the Guadalupe River between San Antonio and San Marcos; Seguin is named for Juan Seguín (one of the most important Tejano political and military leaders in Texas history — Juan Seguín was a Texas revolutionary who fought at the Battle of the Alamo (he was one of the defenders who survived the Alamo, as he had left on a message-carrying mission before the final assault) and the Battle of San Jacinto; Seguín later served as mayor of San Antonio)); Seguin is known as the 'Pecan Capital of Texas' (Seguin and Guadalupe County are historically one of the most important pecan-growing regions in Texas — the German immigrant community that settled the Seguin area in the 1840s established the pecan orchards and farming traditions that made the region famous), home of Texas Lutheran University (a small Lutheran liberal arts university), a diverse Guadalupe County community with a significant Hispanic-American, German-heritage, and working-class population — draws its municipal water supply via the City of Seguin Water Division. Water hardness in Seguin measures 251 mg/L — classified as very hard.
Seguin's very hard supply reflects the south-central Texas Guadalupe County Edwards Plateau limestone's highly calcareous character. The Guadalupe River at Seguin drains Cretaceous Edwards Group limestone (highly calcareous karst). Very limited softening produces the very hard 251 mg/L.
At 251 mg/L, Seguin residents face significant hard water challenges. Regular water softeners and descaling are strongly recommended. City of Seguin Water Division consistently delivers water meeting all Texas TCEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Guadalupe River via the City of Seguin Water Division — the Guadalupe County south-central Texas Guadalupe River Valley Seguin corridor (Cretaceous calcareous Edwards Group — the extremely calcareous south-central Texas Edwards Plateau limestone; very limited softening); very hard at 251 mg/L in Guadalupe County.