SoftenThe Bay Area's Most Reviewed
Water Softener Team.
"Soften's technicians found scale buildup our plumber had missed for three years. Our Miele coffee machine now pulls shots the way it did the day we bought it."
Your pipes are
wearing armor.
We strip it off.
San Francisco's municipal water carries 180–260 mg/L of dissolved calcium and magnesium — among the hardest in California. Every glass of water leaves a deposit. Every shower leaves a film. Every appliance shortens its own lifespan. We reverse the damage, one home at a time.
Your ZIP code
has a water problem.
SF Public Utilities Commission water hardness data, mapped by ZIP code. The darker the cell, the harder your water — and the faster your appliances, pipes, and glass surfaces are degrading right now.
Hover over any ZIP code to see hardness level and common issues →
Data source: SF PUC Water Quality Reports 2023–2025. Hardness values are annual averages.
What hard water actually
does to your home.
After 8 years of SF municipal water, this homeowner's copper supply line had narrowed from 3/4-inch to barely 1/4-inch of usable diameter. Water pressure dropped 60%. The white armor is calcium carbonate — the same compound in limestone.
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Our electrolytic descaling process dissolves calcium deposits without acid or pipe replacement. Full diameter restored. This Pacific Heights family avoided a $14,000 repiping quote by calling us first.
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This Marina homeowner had replaced their shower door twice in five years, assuming the etching was permanent. It wasn't. SF water deposits etch glass chemically — but within 72 hours, we restore clarity with our pH-neutral descaling treatment.
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The Mission District has SF's hardest water at 245 mg/L. This homeowner's $4,500 espresso machine was pulling 35-second shots instead of 28 — a symptom of scale-narrowed group head passages. Two hours of service restored it to factory spec.
Book a free assessmentWhat SF homeowners
say in their own words.
We'd been tolerating spotted dishes and gray shower grout for two years, assuming it was our dishwasher. Soften's technician tested our water at 248 mg/L — nearly three times what our Miele is rated for. Three weeks after treatment, our glasses come out of the dishwasher looking like they did when we bought them.
I manage 34 units across the Peninsula. Hard water complaints were costing me $8,000 a year in plumber callouts and appliance replacements. Soften installed building-entry treatment in four of my properties last spring. Maintenance calls related to scale are down 80%. That's not an estimate — I track it.
My tankless water heater threw an error code every three months. The manufacturer said it was normal for SF. Soften said it wasn't — they descaled the heat exchanger in under two hours and installed a point-of-entry filter. Zero error codes in fourteen months. I wish I'd called them the week I moved in.
Book your free
water assessment.
A Soften technician visits your home, tests your water hardness on-site, inspects your pipes and appliances, and gives you a written report — at no cost, no obligation. Most assessments take 45 minutes.
Download the SF Water Hardness Report
32-page guide covering every SF ZIP code, appliance damage thresholds, and DIY descaling limits. Free PDF.