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Water Filtration · Sonoma & Marin

Cleaner Water. Right From the Tap.

Whole-house filtration, water softeners, reverse osmosis, and well water treatment for Sonoma and Marin homes. Cleaner water at every faucet — for drinking, bathing, laundry, and cooking.

4.9★ · 120+ Google Reviews Licensed · CA #1115191 Local · Sonoma & Marin
Six Signs Your Water Needs Help

If Any of These Sound Familiar, You’re Not Imagining It.

Most people get used to bad water and stop noticing. The signs are still there — in your skin, your appliances, your glassware, and your grocery bill. Here’s how to tell when it’s time to do something about it.

Strong Chlorine Taste or Smell

If your tap water smells like a swimming pool, that’s the chlorine your municipal supplier added to keep it safe. Safe doesn’t mean pleasant. A whole-house carbon filter removes it before it reaches your glass.

Hard Water Scale on Fixtures

White crust on faucets, spots on glassware, residue in the dishwasher. That’s calcium and magnesium — minerals your water carries straight from the source. A softener stops the buildup before it starts.

Dry Skin or Itchy Hair After Showering

Hard water doesn’t rinse soap away cleanly — it leaves a film that dries out skin and dulls hair. Most people who blame their shampoo are actually fighting their water.

Rust, Sediment, or Cloudy Water

Brown tint when you fill a pot. Grit at the bottom of a glass. Cloudy water that doesn’t clear up. These almost always mean iron, sediment, or aging pipes — especially in well water and older homes.

Strange Taste — Metallic, Sulfur, or Earthy

A metallic taste usually means iron or copper. Rotten-egg smell is sulfur. Earthy or musty taste often means algae or organic matter. Each one points to a different fix — testing tells us which.

Bottled Water Bills Adding Up

The average California family spends $400–$700 a year on bottled water they wouldn’t need with a real filter. A whole-house system pays itself back in 2–3 years — and never runs out at 9 PM on a Sunday.

The first step is always the same: test the water before recommending the system. Anything else is guessing.

Why Your Water Needs Help Here

North Bay Water Has Three Big Issues.

Three things make filtration especially worthwhile in Sonoma and Marin — and they affect different homes differently. Knowing which one applies to your house is the difference between the right system and a waste of money.

Hard Water Mineral Content

Santa Rosa, Petaluma, and Novato sit in some of the hardest water zones in California. Calcium and magnesium levels here destroy faucets, shorten water heater life, and leave residue on everything water touches.

Well Water Variability

Many properties in West Marin, Penngrove, Glen Ellen, and rural Sonoma rely on private wells. Well water carries iron, sulfur, sediment, and sometimes bacteria — problems city water doesn’t have, requiring filtration city plumbers don’t install.

Wildfire & PFAS Concerns

Recent wildfires have raised real questions about ash contamination in North Bay water systems. Add growing PFAS “forever chemical” concerns statewide, and many homeowners are choosing not to wait for the problem to be officially confirmed.

Our Filtration Services

The Right System for Your Water.

There’s no one-size-fits-all in water filtration. Hard water needs softening. Well water needs sterilization. Drinking water needs polishing. We install the right system for your specific water — not whatever we mark up most.

Whole-House Water Filtration

A single system that filters every drop entering your home — for drinking, bathing, laundry, and appliances. Removes chlorine, sediment, taste, and most contaminants in one install.

Water Softeners

Removes the calcium and magnesium responsible for hard water scale, dry skin, dingy laundry, and short water heater life. The single highest-impact upgrade for most North Bay homes.

Reverse Osmosis (Under-Sink)

The cleanest drinking water you can install at a residential scale. Filters out 99% of dissolved solids, contaminants, and bad taste. Mounts under the kitchen sink with a dedicated faucet.

Well Water Treatment & UV

For private wells: iron and sulfur removal, sediment filtration, and UV sterilization to kill bacteria. We handle the unique water quality issues city plumbers don’t see.

Salt-Free Water Conditioners

An alternative to traditional softeners that uses no salt and wastes no water — ideal for drought-conscious homes or properties on septic. Reduces scale buildup without removing minerals.

Service & Filter Replacement

Every filter has a lifespan. We service every major brand — Pelican, Aquasana, Culligan, EcoWater, RainSoft, and more. If we didn’t install it, we’ll still keep it running.

The West Coast Difference

Honest Filtration Advice. No Pressure.

Water filtration is a category full of high-pressure salespeople and gimmicky systems. We don’t work that way. We test the water, we tell you what it actually needs, and we install the right system — not the one with the highest commission.

West Coast Plumbing technician installing a water filtration system in a Sonoma County home
Why Homeowners Choose Us
  • We Test Your Water First

    Before we recommend anything, we test your actual water. Hardness, chlorine, iron, sediment, pH. Then we recommend the system that fits the test — not a generic upsell.

  • Local Water Expertise

    We’ve installed filtration across Santa Rosa, Petaluma, Novato, and rural West Marin. We know which water issues show up in which neighborhoods — and which systems actually solve them here.

  • No High-Pressure Sales

    We’re plumbers, not commission salespeople. We tell you what your water needs — and what it doesn’t. Sometimes that’s a $4,000 whole-house system. Sometimes it’s a $400 under-sink filter.

  • We Service Any Brand

    Pelican, Aquasana, Culligan, EcoWater, RainSoft, off-brand — doesn’t matter who sold or installed your system. If it needs filters, service, or repair, we keep it running.

Common Questions

Honest Answers About Filtration.

Do I need a whole-house system or just an under-sink filter?

Depends on the problem. If you only care about better drinking water and ice, an under-sink reverse osmosis system at the kitchen sink is enough — and far cheaper. If you also want to eliminate hard water scale on showerheads, save your water heater, and stop dry skin, you need a whole-house system. Many homes do best with both.

What’s the difference between a softener and a conditioner?

A water softener removes calcium and magnesium by ion-exchange (using salt). A conditioner doesn’t remove minerals — it changes their structure so they don’t bond into scale. Softeners work better for hard water symptoms (scale, soap problems). Conditioners use no salt or wastewater, making them better for septic systems and drought-conscious homes. We’ll help you decide based on your priorities.

How much does whole-house filtration cost?

Most whole-house systems run $1,800–$5,500 installed, depending on capacity and features. Water softeners alone: $1,500–$3,500. Reverse osmosis (under-sink): $500–$1,200. Well water treatment with UV: $2,500–$6,000. We give upfront quotes after testing your water — not vague ranges that change at the end of the install.

How often do filters need to be replaced?

Depends on the system. Most whole-house carbon filters: every 6–12 months. Sediment pre-filters: every 3–6 months. Reverse osmosis membranes: every 2–3 years. UV bulbs: annually. We can set up a maintenance schedule so you don’t have to remember — we just show up when it’s time.

What about PFAS and “forever chemicals”?

PFAS (per- and polyfluoroalkyl substances) are a real and growing concern in California water supplies. Most carbon filters reduce PFAS partially. Reverse osmosis systems remove the vast majority. If PFAS is your primary concern, RO is the right answer for drinking water. We can recommend specific systems with verified PFAS reduction certifications.

Will a water softener affect my landscaping or septic system?

Traditional salt-based softeners discharge brine, which can affect plants and isn’t ideal for septic systems if used heavily. Salt-free conditioners avoid this entirely — nothing is added to your water and nothing is discharged. For homes on septic or with sensitive landscaping, we usually recommend salt-free systems unless the hardness is extreme.

Ready for Better Water?

Book a free water test. We’ll tell you what’s in your water, what (if anything) needs filtering, and what it would cost — honestly and upfront.