You care about your home's indoor air quality, taking steps to protect your health. But what about the water quality inside your home?
Tap water is treated in California and throughout the country, but many different contaminants still end up in the water supply, which can compromise your health.
Several methods exist for water filtration, including reverse osmosis (RO), a home water treatment that we recommend for any property in Northern California.
Typically, RO systems are installed in the kitchen, but you could also choose to have your system installed in your garage, basement, or somewhere else where it can remain more concealed.
Eliminate the potentially hazardous chemicals in your drinking water. Schedule a consultation with Ongaro & Sons about installing a reverse osmosis system in your home.
What Is Reverse Osmosis?
A reverse osmosis system is highly effective at removing contaminants, including chloride, copper, chromium, arsenic, and lead, some of which may be in your home’s tap water at this very moment!
How Reverse Osmosis Works
Reverse osmosis systems filter and flush out contaminants in water by moving water across a semi-permeable membrane. The result is cleaner, purified water for drinking, cooking, and bathing.
Benefits of Reverse Osmosis Water Filtration Systems
Many households rely on basic pitcher filters or refrigerator filters, but these systems typically only target chlorine and sediment. A reverse osmosis system offers a much higher level of filtration, providing peace of mind that your family is drinking truly purified water—it’s easy to see why reverse osmosis systems are so beneficial!
You don’t want to be drinking or cooking with impure water—otherwise, you will risk compromising your health by ingesting these dangerous chemicals and contaminants.
Here’s a full list of all the advantages that reverse osmosis water filtration systems offer:
Reverse osmosis systems effectively filter out a wide range of harmful substances—such as lead, chlorine, arsenic, nitrates, PFAS, and more. This multi-stage process provides cleaner, safer water from every tap, making it one of the most comprehensive home filtration options available today.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert—specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Northern California. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
PHCC- and NATE-Certified Experts
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time—no surprises.
Professional Installation by Ongaro & Sons
With over 90 years of trusted service, Ongaro & Sons is your go-to team for professional water treatment solutions. When you choose us for your reverse osmosis installation, you’re getting:
- Expert system recommendations tailored to your home’s needs.
Professional installation by licensed, experienced plumbers.
Clean, organized workmanship and full system testing.
Ongoing service, filter changes, and maintenance as needed.
We install compact under-sink RO units, whole-house systems, and multi-stage filtration setups depending on your needs, space, and water source.
Is Reverse Osmosis Right for You?
If you’re concerned about the taste, safety, or appearance of your water, an RO system could be the perfect solution. It’s especially helpful if:
You have well water or live in an area with older pipes.
You have family members with sensitive immune systems.
You’re looking to reduce plastic bottle use.
You want peace of mind about what’s in your water.
Let our team test your water and explain your options. We’ll help you make an informed choice without any pressure.
Trusted Reverse Osmosis Services in Northern California
Serving Santa Rosa, San Rafael, Kentfield, and elsewhere in Sonoma, Napa, and Marin counties since 1932, Ongaro & Sons is a fourth-generation, family-owned business committed to high standards, honest service, and lasting solutions.
Our team is committed to protecting your health, and we know that it can start with the water in your home. When you’re looking for a solution for polluted or hard water, we have many options available, including water softeners, whole-home water filtration, and reverse osmosis systems.
Speak with our experts to learn about the course of action we recommend to help you achieve all of your water quality goals. You don’t have to deal with water that is too high in iron, calcium, or heavy metals. Take back control of your home’s contaminated water by turning to Ongaro & Sons for help!
Considering Reverse Osmosis? Call Us!
Pure, filtered water is one call away—contact Ongaro & Sons to schedule a consultation and learn more about our reverse osmosis systems. Call us at 415-741-2820 or request services online to get started.
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Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Neglecting your routine checkups can potentially put everyone at risk.
With these annual visits, our experienced technicians use the latest technology to help find unsafe problems before they can become bigger problems.
Maintenance Plan Benefits
Member benefit of 5% discount on repairs and replacements.
Proactive maintenance identifies and addresses issues before they become big problems.
Courtesy reminder calls for scheduled services and appointments.
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Frequently Asked Questions
Yes, RO systems reduce hardness-causing minerals, but they’re not a substitute for a whole-home water softener. For households with very hard water, it’s best to combine a water softener with a reverse osmosis system.