Houston vs San Antonio
Water hardness comparison — how the two cities differ and what it means for your home.
Houston
united states
137mg/L
Hard Water
9.59°e
Hard
Base Unit (CaCO3): 137 mg/LLocal Unit
HarderFull San Antonio data →
San Antonio
united states
299mg/L
Very Hard Water
20.93°e
Very Hard
Base Unit (CaCO3): 299 mg/LLocal Unit
Side-by-Side Impact
| Impact Area | Houston | San Antonio |
|---|---|---|
| Limescale buildup | Moderate — monthly descaling | Rapid — visible within weeks |
| Boiler/heating risk | Monitor annually | Annual descaling required |
| Dishwasher salt setting | High salt setting (3–5) | Max salt setting (5–7) |
| Skin & hair impact | Low risk | High eczema/dry skin risk |
| Detergent usage | +15–25% more | +30–40% more detergent |
Key Findings
Hardness Difference: 162 mg/L
San Antonio is significantly harder than Houston — a difference that has major household implications. Appliances, boiler warranties, and detergent costs will differ substantially.
Moving from Houston to San Antonio?
If you're relocating from Houston to San Antonio, expect visible limescale on taps and shower heads within weeks. You'll need to recalibrate your dishwasher's salt setting, increase kettle descaling frequency, and check your boiler warranty requirements. A shower filter and under-sink scale inhibitor are worth considering immediately.
Compare With Other Cities
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