Boerne Water Hardness & Quality Report (2026)
Water Hardness
8.2 grains per gallon
Source
mixed
pH Level
7.8
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
311.9 mg/L
Est. Daily Cost
$0.37
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 Boerne, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Boerne | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5 yrs | 8.5 yrs | -41% |
| Washing Machine | 8.4 yrs | 12 yrs | -30% |
| Water Heater | 10 yrs | 15 yrs | -33% |
Regional Water Comparison
How Boerne compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Boerne, Texas | 140 mg/L | 6 ppt | 🟠 Hard | mixed |
| Timberwood Park, Texas | 85.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | mixed |
| San Antonio, Texas | 399 mg/L | 11.5 ppt | 🔴 Very Hard | mixed |
| Live Oak, Texas | 243 mg/L | 8.2 ppt | 🔴 Very Hard | mixed |
| Canyon Lake, Texas | 275.5 mg/L | 8.9 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Boerne compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Boerne | 140 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Boerne's Water Unique?
Local geology and source profile
Boerne, Texas, in Kendall County — the Kendall County seat adjacent to San Antonio and Comfort in the central Texas Hill Country — receives its water from the Boerne Water System, drawing from the Edwards Aquifer and Guadalupe River (Kendall County) through the Hill Country distribution.
The moderately hard 140 mg/L hardness and TDS of 311.9 mg/L reflect the central Texas Kendall County Hill Country supply's moderate calcareous character — reflecting the Cretaceous Edwards Limestone dissolution typical of the Texas Hill Country-Balcones Escarpment zone, slightly harder than Austin (122 mg/L) due to Kendall County's position deeper in the Edwards Plateau zone. The Edwards Aquifer at Kendall County — Cretaceous Edwards Limestone (calcareous — primary hardness contributor), Cretaceous Glen Rose Limestone (calcareous — secondary contributor), and Cretaceous Georgetown Limestone (calcareous — minor contributor).
At 140 mg/L, Boerne's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 6.0 ppt warrants a certified drinking water filter — Randolph Air Force Base (Bexar County — AFFF, nearby) and the central Texas Kendall County military corridor contribute to Boerne's readings.
Geology & Source: Boerne in Kendall County draws from the Boerne Water System on the Edwards Aquifer and Guadalupe River (Kendall County, central Texas Hill Country) — the Edwards Aquifer at Kendall County is developed in Cretaceous Edwards Limestone (highly calcareous) and Cretaceous Glen Rose Limestone — Texas Kendall County Edwards Aquifer-Guadalupe River Cretaceous calcareous Hill Country watershed produces moderately hard water at 140 mg/L with TDS 311.9 mg/L.